View Full Version : 3/4 drive Koken Metric set
rhandwor
07-16-2009, 06:37 PM
http://www.ebay.com/ Search 180376993204
This appears to be a good price.
Diesel-Mech
07-16-2009, 06:54 PM
That is a smokin deal, I just picked up a set and I hardly even have a use for metric 3/4" stuff. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&_rdc=1&ru=http%3A%2F%2Fshop.ebay.com%3A80%2F%3F_from%3DR4 0%26_trksid%3Dp3907.m38.l1313%26_nkw%3D18037699320 4%26_sacat%3DSee-All-Categories%26_fvi%3D1&item=180376993204&viewitem=
Kurt4440
07-16-2009, 07:16 PM
With my coupon $115.63 shipped to the door. I will let you know what they look like when the package arrives.
scottmlew
07-16-2009, 07:32 PM
Same seller also has the socket set with a ratchet and 2 extensions for $350 plus shipping.
Diesel-Mech
07-16-2009, 07:36 PM
Well that was quick all 4 are gone, who got the other two?
48548
07-17-2009, 07:38 AM
There are 5 more, hehehehe. She posted more after I tried to make an offer.
rhandwor
07-17-2009, 07:46 AM
That is a smokin deal, I just picked up a set and I hardly even have a use for metric 3/4" stuff. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&_rdc=1&ru=http%3A%2F%2Fshop.ebay.com%3A80%2F%3F_from%3DR4 0%26_trksid%3Dp3907.m38.l1313%26_nkw%3D18037699320 4%26_sacat%3DSee-All-Categories%26_fvi%3D1&item=180376993204&viewitem=
Go to yahoo and search millimeter to inch a lot of your metric set will work.
Snap On used to put both metric and US on the same sockets.
rhastings80
07-17-2009, 10:16 AM
Here are 2 more that are for sale. I just bought one. I hope these are nice.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=180384140466
Rob
48548
07-17-2009, 10:37 AM
Also I was able to make an offer for 95 and she took it, so it can save you 5 dollars.
Paumanok
07-17-2009, 11:22 AM
I thought I missed out last night, checked again this morning and there were 5 more sets listed. I bought one too, at that price it works out to like $4 and change per socket. Lets hope that Koken lives up to its high quality reputation:thumbup:
48548
07-17-2009, 02:48 PM
I want to see what this koken stuff is about also and I hope that it works well, should be better than the hf set I was going to buy.:lol_hitti
DetroitDIESEL444
07-17-2009, 02:53 PM
i bought one.... i had been sitting on it for a while.
48548
07-17-2009, 03:15 PM
3 left, someone needs to pick them up....
48548
07-17-2009, 03:37 PM
Down to 2 left now, 2 more people jump on them for 5 a piece with shipping....
dede2897234
07-17-2009, 11:56 PM
Guys,
I noticed that the Ko-ken 3/4" drive sockets being sold on eBay were manufactured using the older 12 point design (not Snap-on's universally adopted "Flank Drive" technology). Will the lack of "Flank Drive" affect turning performance on such large nuts?
Thanks,
Dave
Diesel-Mech
07-17-2009, 11:58 PM
Guys,
I noticed that the Ko-ken 3/4" drive sockets being sold on eBay were manufactured using the older 12 point design (not Snap-on's universally adopted "Flank Drive" technology). Will the lack of "Flank Drive" affect turning performance on such large nuts?
Thanks,
Dave
Extremely unlikely that would make a difference on anything you would use 3/4" drive for in my opinion.
rhandwor
07-18-2009, 07:36 AM
I've heard this for years and my combination wrenches are preflankdrive. I have a few small size six point I use when they are corroded. I don't think you will have any problem.
If you need a 3/4 drive set I would buy a set of these. I purchased some Proto metric at a flea market and added some other sizes of metric. I paid $40.00 for these around 1980.
I imagine a new Snap On set would be around $1000.00 about 10 times this price.
scottmlew
07-18-2009, 10:08 AM
I got one of the sets in the first offering...sorry, I thought I had mentioned that. Thx to the OP for pointing out a deal!
How are you guys planning to store these? I don't believe that Ernst or Hansen makes holders that accommodate the 60+mm sockets!
Diesel-Mech
07-18-2009, 10:21 AM
I got one of the sets in the first offering...sorry, I thought I had mentioned that. Thx to the OP for pointing out a deal!
How are you guys planning to store these? I don't believe that Ernst or Hansen makes holders that accommodate the 60+mm sockets!
I'm just going to set them on the drawer mat in the bottom drawer of my box with the other 3/4" drive stuff I already have for the most part they are heavy enough that they wont slide around.:thumbup:
Nikolai_V
07-19-2009, 04:33 AM
Just to be a Koken geek - I was reading one of their catalogues in the store the other day, and it mentioned they had a patent for a suface drive type socket back in the 60`s or 70`s (from memory).
I`ve never had any issues with mine not gripping fasteners securely.
superautobacs
07-19-2009, 09:50 PM
Nikolai V, I'm somewhat of a Ko-ken geek as well. I wish I could walk into a store full of their stuff.
Ko-ken did have a patent application dating back to December 1967. It was a domestic patent for a brand new (in Japan) type of drive called the Flat Drive. Unlike Snap-on's Flank Drive with 144 degree, Ko-ken's was 148 degrees.
UK Steve
07-20-2009, 05:57 AM
Nikolai V, I'm somewhat of a Ko-ken geek as well. I wish I could walk into a store full of their stuff.
Ko-ken did have a patent application dating back to December 1967. It was a domestic patent for a brand new (in Japan) type of drive called the Flat Drive. Unlike Snap-on's Flank Drive with 148 degree, Ko-ken's was 144 degrees.
Let's us geeks get our facts right.... "Over 40 years ago Ko-ken developed a new 12 point opening by reducing the angle of the conventional oppening (150 deg) to 148 Deg in order to improve the gripping zones of the socket teeth and their effectivness on nuts & bolts"
Everybody including Snap-on used and still use 150 deg Ko-ken developed the 148 deg angle.
In 1986 Ko-ken introduced Flat drive (Snap-on's Flank drive invented by Rolls Royce way back in the 20's) to all sockets, this in combination with 148 deg made Ko-ken 12 point sockets unbeatable.
I would be careful with those sockets on ebay.....they are less than wholesale prices.
rhandwor
07-20-2009, 07:47 AM
Nikolai V, I'm somewhat of a Ko-ken geek as well. I wish I could walk into a store full of their stuff.
Ko-ken did have a patent application dating back to December 1967. It was a domestic patent for a brand new (in Japan) type of drive called the Flat Drive. Unlike Snap-on's Flank Drive with 148 degree, Ko-ken's was 144 degrees.
This appears to prevent cracking as even six point sockets have the sharp radius rounded also. Its presented as a sales item to give a better grip but also helps prevent cracking.
rhandwor
07-20-2009, 08:17 AM
Let's us geeks get our facts right.... "Over 40 years ago Ko-ken developed a new 12 point opening by reducing the angle of the conventional oppening (150 deg) to 148 Deg in order to improve the gripping zones of the socket teeth and their effectivness on nuts & bolts"
Everybody including Snap-on used and still use 150 deg Ko-ken developed the 148 deg angle.
In 1986 Ko-ken introduced Flat drive (Snap-on's Flank drive invented by Rolls Royce way back in the 20's) to all sockets, this in combination with 148 deg made Ko-ken 12 point sockets unbeatable.
I would be careful with those sockets on ebay.....they are less than wholesale prices.
A lot of times if a truck going to a large distributor gets in a wreck the insurance company pays and they get a new shipment. The insurance carrier sells the rest of the shipment on the wrecked truck for a good price. Sometimes a company goes out of business and the stock is auctioned off and the tools end up on ebay.
I don't know for sure how these were obtained.
OldSchoolSS
07-20-2009, 08:29 AM
Those exact same sets were on there for 40 dollars from the same seller a couple of months ago. I almost bought one then I realized I'd never use it. The seller is only about 15 minutes from me.
Monte
07-20-2009, 08:36 AM
@UK Steve: Can you tell us what exactly are the advantages of the Ko-Ken design compared to the others ? There is a tremendous amount of different socket designs from "Flank-drive" to Unit-drive, AS-drive, Torqueplus, Energy-profil, Tractionsprofil, sure-grip, etc. but what are the advantages of the different 6 and 12 point styles compared to each other and what makes ko-ken superior ??
:)
12 Kant /point:
http://www.werkzeugforum.de/uploads/pics/Stahlwille_Nuss_03.jpg
UD-Profil (Unit Drive)
http://www.werkzeugforum.de/uploads/pics/Gedore_Nu__02.jpg
6 kant /point (no flank drive etc.)
http://www.werkzeugforum.de/uploads/pics/Gedore_Halbzoll_6Kant_02.jpg
http://www.werkzeugforum.de/uploads/pics/Vergleich_13_mm_01.jpg
http://www.werkzeugforum.de/uploads/pics/8mm_Vergleich_Kopie_01.jpg
UK Steve
07-20-2009, 10:07 AM
MONTE......"UK Steve: Can you tell us what exactly are the advantages of the Ko-Ken design compared to the others ? There is a tremendous amount of different socket designs from "Flank-drive" to Unit-drive, AS-drive, Torqueplus, Energy-profil, Tractionsprofil, sure-grip, etc. but what are the advantages of the different 6 and 12 point styles compared to each other and what makes ko-ken superior ??"
OK here goes......."There is a tremendous amount of different socket designs from "Flank-drive" to Unit-drive, AS-drive, Torqueplus, Energy-profil, Tractionsprofil, sure-grip" .....First of all, all these are basically the same as Snap-on's flank drive system and Ko-ken's FLAT DRIVE introduced in 86 after Snap-on' patent came to an end.
Prior to all this back in 67 Ko-ken introduced (12 point only) the 148 deg angle on the flats of the sockets, this allows the socket to bite into the flats of the fastener, usefull when the fastener is slightly worn. Bear in mind back in the sixties most sockets were 12 point.
After Snap-on's patent ran out early/mid 80's, Ko-ken along with most quality socket/ring spanner producers adopted the "Flank drive" system but unable to call it Flank drive, hence all the different names you mention.
But Ko-ken still use the 148 deg (12 point only) profile to day also incorporating FLAT DRIVE.....Phew..........hope that helps.
rhandwor
07-20-2009, 12:05 PM
Those exact same sets were on there for 40 dollars from the same seller a couple of months ago. I almost bought one then I realized I'd never use it. The seller is only about 15 minutes from me.
Why don't you invite her to post a complete list of all her Koken tools on the list?
scottmlew
07-20-2009, 04:01 PM
My sockets arrived today. They're pretty nice, but I don't like the stickers on them...they're bound to get all dirty and grimy (NO -- I am not saying that my tools can't get dirty, but stickers have a tendency to get really nasty and then they're hard to clean). I have no idea how I'll store these, nor do I have any idea what I'd ever use the larger sizes for, but they're cool to have ;)
Paumanok
07-20-2009, 04:02 PM
I got my set today! It's very nice, I would say they are as nice as my snapons. I think this was a steal for 130 delivered!
Diesel-Mech
07-20-2009, 05:28 PM
My set came today and my initial impression is very positive these are really nice sockets and I really like that they are dual marked SAE and Metric.
My problem is that according to the list on her auction of what is supposed to be included I'm Missing the following.
24MM
32MM
34MM
50MM
55MM
And I have extras of.
19mm
23mm
33mm
35mm
46mm
58mm
Diesel-Mech
07-20-2009, 06:14 PM
My set minus the 5 I'm missing.
http://i62.photobucket.com/albums/h103/Ozman2/005-5.jpg
And here's the extras.
http://i62.photobucket.com/albums/h103/Ozman2/006-4.jpg
charlie_nj
07-20-2009, 06:28 PM
My sockets arrived today. They're pretty nice, but I don't like the stickers on them...they're bound to get all dirty and grimy (NO -- I am not saying that my tools can't get dirty, but stickers have a tendency to get really nasty and then they're hard to clean). I have no idea how I'll store these, nor do I have any idea what I'd ever use the larger sizes for, but they're cool to have ;)
I bought one of these sets as well, I don't have it yet. Stickers don't belong on tools, IMO. Can you just peel off the stickers and clean up the adhesive with solvent?
rhandwor
07-20-2009, 07:44 PM
My set came today and my initial impression is very positive these are really nice sockets and I really like that they are dual marked SAE and Metric.
My problem is that according to the list on her auction of what is supposed to be included I'm Missing the following.
24MM
32MM
34MM
50MM
55MM
And I have extras of.
19mm
23mm
33mm
35mm
46mm
58mm
I would wait a day or two as another list member might have your missing sockets. But notify her immediately so she will pay postage.
Diesel-Mech
07-20-2009, 07:50 PM
I would wait a day or two as another list member might have your missing sockets. But notify her immediately so she will pay postage.
I thought about that but she has already contacted me back, shes next day airing me the missing sockets and has already refunded me part of the purchase price as an apology and she is picking up the tab on sending back the wrong sockets. I couldn't ask for a better resolution.:bowdown:
rhastings80
07-20-2009, 08:31 PM
Hi Everyone,
I got my Koken sockets today. Thought I would take some pictures for everyone. I think they look very nice. They were all just dumped in a box and rattling around but I’m not complaining as this was a great deal. Wondering what everybody else thinks? The 63mm socket is huge. It’s as big as my hand. At first glace I have all 27 sockets and no duplicates. Guess I will find out how well my Harbor Freight US General box drawers will holds these. They weight like 37 pounds in all. Now I also need to find a ¾ ratchet and breaker bar. Anybody have any suggestions? :beer:
<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/mgXiM-acXDmINB7zXIBifA?feat=embedwebsite"><img src="http://lh5.ggpht.com/_gyA2MJjiLlg/SmUY0kcNVqI/AAAAAAAAAFM/8Y6MA7mJ8jc/s144/IMG_4091.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/mike.4324/Koken?feat=embedwebsite">Koken</a></td></tr></table>
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I also picked up that 3/8 Koken socket set on Ebay for $35.00. It is not nearly as nice as the ¾ inch. The 3/8inch MM set seems very cheap and the ratchet isn’t very smooth.
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Later,
Rob
scottmlew
07-20-2009, 08:54 PM
I bought one of these sets as well, I don't have it yet. Stickers don't belong on tools, IMO. Can you just peel off the stickers and clean up the adhesive with solvent?
Possibly...I haven't looked into this yet. I will probably leave them on until I actually use them, which might be awhile since I don't really have a good use for 3/4" sockets...but again, they are cool to have! :)
scottmlew
07-20-2009, 08:55 PM
I thought about that but she has already contacted me back, shes next day airing me the missing sockets and has already refunded me part of the purchase price as an apology and she is picking up the tab on sending back the wrong sockets. I couldn't ask for a better resolution.:bowdown:
Yeah, this is a top-notch seller, guys....I had a minor issue that she resolved beyond by satisfaction ASAP.
scottmlew
07-20-2009, 08:57 PM
btw, if you nest the sockets correctly, they all easily fit into a box the size of a shoebox. I have a nice Sterilite plastic container with cover that they all fit into nicely.
lognom
07-20-2009, 11:10 PM
I just rec'd my set of 3/4" sockets, and my "missings" and "extras" are the exact opposite of Diesel-Mech. Like in his case, the vendor is quickly resolving the problem. Otherwise, the sockets look great, and I would buy from her again.
superautobacs
07-21-2009, 01:11 AM
Let's us geeks get our facts right.... "Over 40 years ago Ko-ken developed a new 12 point opening by reducing the angle of the conventional oppening (150 deg) to 148 Deg in order to improve the gripping zones of the socket teeth and their effectivness on nuts & bolts"
Everybody including Snap-on used and still use 150 deg Ko-ken developed the 148 deg angle.
In 1986 Ko-ken introduced Flat drive (Snap-on's Flank drive invented by Rolls Royce way back in the 20's) to all sockets, this in combination with 148 deg made Ko-ken 12 point sockets unbeatable.
I would be careful with those sockets on ebay.....they are less than wholesale prices.
I just realized that my #'s were reversed between the Ko-ken and Snap-on's, so I've corrected it. I apparently didn't read the title of my attachment too well.
I understand that the conventional designs out there are 150deg, but I've read the Snap-on's flank drive to be 144deg; not the 150deg you state. See attachment below.
And, a Japanese source says the patent for the Flat Drive was submitted in Dec. 1967; not the 1986 you mention.
Are you reading these from an old Ko-ken catalogue? If that's the case, it's understandibly hard to dispute it.
UK Steve
07-21-2009, 04:49 AM
I just realized that my #'s were reversed between the Ko-ken and Snap-on's, so I've corrected it. I apparently didn't read the title of my attachment too well.
I understand that the conventional designs out there are 150deg, but I've read the Snap-on's flank drive to be 144deg; not the 150deg you state. See attachment below.
And, a Japanese source says the patent for the Flat Drive was submitted in Dec. 1967; not the 1986 you mention.
Are you reading these from an old Ko-ken catalogue? If that's the case, it's understandibly hard to dispute it.
This is very interesting, I like your attachment it's very informative.
I will hold my hand up to being wrong about Snap-on's 12 point angle, according to your drawing.
Your Japanese source is correct in saying the date was 1967 but that was for the 148 deg angle on the 12 point sockets and not Flat drive, two different things.
Flat drive was introduced in 1986 when Snap-on's flank drive patent ran out.
If you enlarge the photo's of the 3/4" drive sockets in this thread none have flat drive but all will have the 148 deg angle being 12 point.
This tells me that they are quite old sockets, having said that they should have a date stamp as all Ko-ken tools have year & month of manufacture.
48548
07-21-2009, 07:23 AM
Try this as you are into proto..
http://cgi.ebay.com/Vintage-Plumb-Plomb-3-4-Inch-Ratchet-Wrench-5649_W0QQitemZ110414714464QQcmdZViewItemQQptZLH_De faultDomain_0?hash=item19b53ad660&_trksid=p3286.c0.m14&_trkparms=65%3A12%7C66%3A2%7C39%3A1%7C72%3A1205%7C 293%3A1%7C294%3A50
Hi Everyone,
I got my Koken sockets today. Thought I would take some pictures for everyone. I think they look very nice. They were all just dumped in a box and rattling around but I’m not complaining as this was a great deal. Wondering what everybody else thinks? The 63mm socket is huge. It’s as big as my hand. At first glace I have all 27 sockets and no duplicates. Guess I will find out how well my Harbor Freight US General box drawers will holds these. They weight like 37 pounds in all. Now I also need to find a ¾ ratchet and breaker bar. Anybody have any suggestions? :beer:
<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/mgXiM-acXDmINB7zXIBifA?feat=embedwebsite"><img src="http://lh5.ggpht.com/_gyA2MJjiLlg/SmUY0kcNVqI/AAAAAAAAAFM/8Y6MA7mJ8jc/s144/IMG_4091.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/mike.4324/Koken?feat=embedwebsite">Koken</a></td></tr></table>
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<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/hHb_im-sSS4mnRWjXsPzCA?feat=embedwebsite"><img src="http://lh3.ggpht.com/_gyA2MJjiLlg/SmUY1htHOKI/AAAAAAAAAFc/XCagnkh7a3o/s144/IMG_4097.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/mike.4324/Koken?feat=embedwebsite">Koken</a></td></tr></table>
I also picked up that 3/8 Koken socket set on Ebay for $35.00. It is not nearly as nice as the ¾ inch. The 3/8inch MM set seems very cheap and the ratchet isn’t very smooth.
<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/Afr5xJ1SHys05NEXXCqqsA?feat=embedwebsite"><img src="http://lh6.ggpht.com/_gyA2MJjiLlg/SmUZfMfMLqI/AAAAAAAAAFk/_6CBvgb-bOM/s144/IMG_4101.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/mike.4324/Koken?feat=embedwebsite">Koken</a></td></tr></table>
<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/rgQpw2qjDRrUknd8_C0V4A?feat=embedwebsite"><img src="http://lh4.ggpht.com/_gyA2MJjiLlg/SmUZfZ8BNYI/AAAAAAAAAFo/Bip3mAlF5fM/s144/IMG_4100.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/mike.4324/Koken?feat=embedwebsite">Koken</a></td></tr></table>
<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/NdIGh7gjJJoQ1aGDVUwFAQ?feat=embedwebsite"><img src="http://lh6.ggpht.com/_gyA2MJjiLlg/SmUZfhk6WmI/AAAAAAAAAFs/mlY2geTb4Z0/s144/IMG_4099.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/mike.4324/Koken?feat=embedwebsite">Koken</a></td></tr></table>
<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/IjfD1U2Bu59BwrOENaYQWQ?feat=embedwebsite"><img src="http://lh6.ggpht.com/_gyA2MJjiLlg/SmUZf8_h6TI/AAAAAAAAAFw/9zNqjXAv-UU/s144/IMG_4098.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/mike.4324/Koken?feat=embedwebsite">Koken</a></td></tr></table>
Later,
Rob
rhandwor
07-21-2009, 08:15 AM
Where can Koken sockets be warrantied in the USA. Will they warranty a chrome socket used on an impact wrench. I imagine a few of these will be used on an impact wrench.
Paumanok
07-21-2009, 08:19 AM
Can anyone recomend a quality 3/4" ratchet other than SO. All my snapon 3/4" gear has those locking pins in addition to the spring retainer ball on most normal ratchets. My Koken sockets don't want to go on the SO stuff, and I'm afraid if I force one of the Kokens on, I won't be able to get it off, 'cause I can't release the locking pin(no button on the Koken socket). Would anyone recomend a new proto 3/4" ratchet? Are they still made in USA? How about a long(at least 36") 3/4" breaker bar?(other than snapon - I have the snappy one and the head is not compatible with Koken sockets). Thanks guys:thumbup:
rhandwor
07-21-2009, 08:25 AM
I have a long Wright that has held up well. A friend with a Semi Has one and he has used a six foot pipe on his.
Ask TRTOOLSUPPLY he's on the list and might give you a discount.
48548
07-21-2009, 08:28 AM
Proto, would be my recommendation, or if you want to save some bucks I bought 2 snap on 3/4 ratchet adapters to use with my breaker bars or I also have a couple plomb 5849 1" ratchets and a toptul impact reducer that should work just fine with the 3/4 sockets.
Kurt4440
07-21-2009, 09:53 AM
So how old are these Koken sockets?
rhandwor
07-21-2009, 12:53 PM
http://www.ebay.com/ Search Armstrong and Proto ratchets 3/4 drive they have several used.
superautobacs
07-21-2009, 05:12 PM
...
Your Japanese source is correct in saying the date was 1967 but that was for the 148 deg angle on the 12 point sockets and not Flat drive, two different things.
Flat drive was introduced in 1986 when Snap-on's flank drive patent ran out.
...
I get it now. The attached image that I put up of the Ko-ken....the top drawing shows the 148deg they started in 1967 and the bottom drawing depicts the sockets after 1986.
Thanks for the clarification. :)
So how old are these Koken sockets?
With the newer products, there are 3 digits. ie. 097 --the first two digits equate to the year and the last digit being the month. October would be 090; November 09J; December 09K
In your case, there's only two digits and I don't know how to decode it. Perhaps UKSteve might know.
superautobacs
07-21-2009, 06:09 PM
There is a tremendous amount of different socket designs from "Flank-drive" to Unit-drive, AS-drive, Torqueplus, Energy-profil, Tractionsprofil, sure-grip, etc. but what are the advantages of the different 6 and 12 point styles compared to each other and what makes ko-ken superior ??
[/IMG]
Like UKSteve mentioned, after SO's patent term expired, many started to copy/mimic the design, and coming up with their own names. In essence they're all trying to acheive a socket/wrench pattern that does not bear any forces on hex points, but on the hex flats.
I think there's two major designs in the market when it come to fastener-friendly drive patterns:
1. Flank Drive pattern
2. Loc-Rite pattern
Many are familiar with the Flank-drive pattern as it's the most widely recognized design, but have probably never heard of the Loc-rite pattern. Loc-Rite drive was apparently patented even before Snap-on's Flank Drive, in March of 1964 by Utica-Bonney.
I think the primary difference between the two patterns is this:
Flank Drive styles, whether it be a genuine Snap-on 144deg angle or a more conventional 150deg or anywhere in between, the driving force is exerted on a single point on the hex flat during high torque situations.
On the other hand, the Loc-Rite, or any variation to it's wavey pattern, is exerting it's force on a slightly larger surface area of the hex flat during high torque situations.
48548
07-21-2009, 06:14 PM
It would appear the person still has 3 sets in case someone wanted to pick one up.
48548
07-21-2009, 06:36 PM
I just picked up another plomb 5668 breaker bar on ebay for 35, not great but when I add that to the proto 3/4 ratchet adapter I got for less than 20, that sure makes is a better deal. Also look at snap on ratchet adapters a new 3/4 can be had for 150 or a used one for about 50 or so, then get a breaker bar and you are good to go.
UK Steve
07-22-2009, 03:51 AM
So how old are these Koken sockets?
After doing some detective work and asking the right people the right questions, the date of manufacture on the socket photographed is March 1985, now don't ask me why it's not March 1995 because I don't know the secret of the code.
But I'm going to find out,..... it's now a mission.
UK Steve
07-22-2009, 03:54 AM
Where can Koken sockets be warrantied in the USA. Will they warranty a chrome socket used on an impact wrench. I imagine a few of these will be used on an impact wrench.
Stahlwille are the US distributors of Ko-ken, maybe try them, but don't hold your breath, impacted chrome sockets are a no no.
UK Steve
07-22-2009, 03:57 AM
Can anyone recomend a quality 3/4" ratchet other than SO. All my snapon 3/4" gear has those locking pins in addition to the spring retainer ball on most normal ratchets. My Koken sockets don't want to go on the SO stuff, and I'm afraid if I force one of the Kokens on, I won't be able to get it off, 'cause I can't release the locking pin(no button on the Koken socket). Would anyone recomend a new proto 3/4" ratchet? Are they still made in USA? How about a long(at least 36") 3/4" breaker bar?(other than snapon - I have the snappy one and the head is not compatible with Koken sockets). Thanks guys:thumbup:
Why not try Ko-ken, they do a 1000mm breaker bar where the head can be exchanged for a ratchet head, cracking piece of kit.
rhandwor
07-22-2009, 01:54 PM
I think she said she would put in two packages to drop postage to foreign countries.
Diesel-Mech
07-22-2009, 03:18 PM
I received my missing sockets today, I'm both very happy with the sockets and the seller so if any of you are on the fence about buying a set for those reasons I give both a thumbs up from me.
48548
07-22-2009, 03:33 PM
2 more left for now... Pick them up while you can.
scottmlew
07-22-2009, 06:03 PM
Yeah, you should all get in on this action...it's a great deal, and the seller is top-notch! Admittedly, most of us will use only the smaller sizes, but it's still a good deal!
48548
07-23-2009, 06:24 AM
Looks like they are down to one set left.
webscrounger
07-23-2009, 06:19 PM
Hi, I'm Craig. Found you posts about the Koken stuff and just joined the forum. Good place for tool info.
The socket set sounded too good to be true if you add up what you'd pay retail for all those sockets so I jumped on it and bought one set on eBay. I don't really need some of those large sockets but for the price, what the heck.
The current add says there are two left.
Go get em!
48548
07-23-2009, 06:40 PM
Hmmmm The number keeps changing maybe she has more to sell.....
rhandwor
07-23-2009, 06:43 PM
Has anyone used the sockets yet?
Diesel-Mech
07-23-2009, 06:49 PM
The return address and box that my missing sockets came in is from a large rubber molding company so I'm guessing maybe they bought these large drive sets for in house maintenance and then never used them or something of that nature.
Turns out they also do this stuff.
Products Description:
Thermoplastic plastics, Rubber and elastomers, Natural rubber, Processed and synthetic rubber, Elastomers, Thermoset plastics, Tools and General machinery.
That explains the good customer service it is a real company selling this stuff.
loganp
07-23-2009, 06:52 PM
I bought a set a few days ago... they will go nicely with my 3/4" jet ratchet and The seller is putting them in 2 separate boxes to save on shipping so I will let you all know how it works out when i get them.. Also The seller has extensions and ratchets listed now as well.
scottmlew
07-24-2009, 12:05 AM
I bought a set a few days ago... they will go nicely with my 3/4" jet ratchet and The seller is putting them in 2 separate boxes to save on shipping so I will let you all know how it works out when i get them.. Also The seller has extensions and ratchets listed now as well.
Yeah I noticed that...but $100 for 2 extensions? Even $100 for a ratchet sounded steep. I know they're brand new, but still...
webscrounger
07-24-2009, 03:30 PM
WOW! One fast shipment. Less than 24 hours and the sockets were at my door! Very nice set of 24 large sockets for $115 delivered even if they are a bit older and lacking the newest socket design. I did notice that the items listed in my auction were less 2 or 3 sockets from those the earlier auctions but it is still a bargain IMO. Happy camper here. :thumbup:
48548
08-08-2009, 12:45 PM
Well I was thinking of using the stuff this weekend, but couldn't find anything big enough that needed the stuff.... Oh well the thought that counts. At least I am prepaired. I have two snap on 3/4 ratchet adapters to use on my 3/4 breakers and an a toptul impact adapter to go from 1" to 3/4 to use on my plomb 1" ratchets and two more snap on 1" ratchet adapters and adapters to go to 3/4 to use on the breaker bars and back down to 3/4 for the sockets.
http://i421.photobucket.com/albums/pp296/48548/IMG_3875.jpg
http://i421.photobucket.com/albums/pp296/48548/IMG_3886.jpg
http://i421.photobucket.com/albums/pp296/48548/IMG_3887.jpg
http://i421.photobucket.com/albums/pp296/48548/IMG_3888.jpg
48548
10-29-2009, 12:05 PM
Has anyone actually used this set and what do they think? I don't have anything to use them on at this time.... So I was curious if anyone else has used them.
rhandwor
10-30-2009, 09:10 PM
You never know when you will need them. I bought a set of Proto used and a little MG came in and they were needed.
It was the last place I ever thought they would be needed.
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