Show us Your Vintage Bench Grinders!!!!

[exmaxima1]

What would be a good guess on HP for my grinder ?

1/2 hp, same as my vintage Atlas 7-inch grinder.

 

[tool_scrounge]

So the concensus is that its a 1/2 horse?

No. Using the equations I posted and assuming a 0.8 power factor, it is 3/4hp.

 

[454ragtop]

No. Using the equations I posted and assuming a 0.8 power factor, it is 3/4hp.

Actually, it's between 1/3 and 1/2 HP http://www.engineeringtoolbox.com/elctrical-motor-full-load-current-d_1499.html

 

[Outlawmws]

That's good info!:

http://redirect.viglink.com/?format=go&jsonp=vglnk_148512067436715&key=8d1879ea4db6639656bbe1af129db4fc&libId=iy96i2oq010025g3000DLv5i83g5&loc=http%3A%2F%2Fwww.garagejournal.com%2Fforum%2Fshowthread.php%3Ft%3D107092%26page%3D69&v=1&out=http%3A%2F%2Fwww.engineeringtoolbox.com%2Felctrical-motor-full-load-current-d_1499.html&ref=http%3A%2F%2Fwww.garagejournal.com%2Fforum%2Fshowthread.php%3Fp%3D6259569%26posted%3D1&title=Show%20us%20Your%20Vintage%20Bench%20Grinders!!!!%20-%20Page%2069%20-%20The%20Garage%20Journal%20Board&txt=http%3A%2F%2Fwww.engineeringtoolbox.com%2Fel...nt-d_1499.html

As a "rules of thumb" amps horsepower rating can be estimated to

115 Volts motor - single-phase : 14 amps/hp
230 Volts motor - single-phase : 7 amps/hp
230 Volts motor - 3-phase : 2.5 amps/hp
460 Volts motor - 3-phase : 1.25 amps/hp
Always check nameplate information before designing the protective devices, wiring and switch gear.

Single-Phase Motors - HP and Full-Load Currents

Three-Phase Motors - HP and Full-Load Currents

1 hp (English horse power) = 745.7 W = 0.746 kW = 550 ft lb/s = 2,545 Btu/h = 33.000 ft lb/m = 1.0139 metric horse power ~= 1.0 KVA

 

[tool_scrounge]

outlawmws - The engineeringtool box calculations must assume a pretty low power factor in their calculations.

For example, they show a 3 phase 230V 3/4hp motor needs 2.8A.

The Baldor 8102w (3 phase 230V 3/4hp) grinder shows 1.4A at 230V (0.7A at 460V)
Link to nameplate:
http://www.baldor.com/catalog/8102W#tab=%22nameplate%22

That is a 2x difference.

 

[Outlawmws]

Maybe they are guessing chicom built motors? I also notice their estimates above the tables don't track either...

And manufacturers are often at odds with reality, particularly when claiming HP...

 

[EOC_Jason]

Forget HP rating for bench grinders, there is no standard what one manufacturer will label vs the next. Heck, even different lines from the same manufacturer will vary...

Just pay attention to the amps (and volts) to gauge how much power it has.

 

[Davefr]

Forget HP rating for bench grinders, there is no standard what one manufacturer will label vs the next. Heck, even different lines from the same manufacturer will vary...

That's absolutely true today. But with this old vintage stuff they were pretty consistent and honest in their nameplate ratings.

Just pay attention to the amps (and volts) to gauge how much power it has.

Agree. Amps is just about everything in grinders.

 

[454ragtop]

outlawmws - The engineeringtool box calculations must assume a pretty low power factor in their calculations.

For example, they show a 3 phase 230V 3/4hp motor needs 2.8A.

The Baldor 8102w (3 phase 230V 3/4hp) grinder shows 1.4A at 230V (0.7A at 460V)
Link to nameplate:
http://www.baldor.com/catalog/8102W#tab=%22nameplate%22

That is a 2x difference.

I'd believe the chart before the Baldor motor, note this 1/4 HP rated VFD delivers 1.8 amps, but even at that I suggested a 1/2 HP VFD.

 

[toolferone]

I picked up this Dunlap at a yard sale for $5.00 as is a few years ago. No side covers, but runs smooth and quiet. I am trying to get the back wheel flange off and it it is not coming. It spins free on the shaft and moves in and out a bit. I can't see any kind of set screw or e-clip behind it. Any thought on how to remove it?

 

[EOC_Jason]

How's the shaft? Maybe a little emery cloth or high-grit sandpaper to smooth it out? Then use some penetrating oil?

 

[toolferone]

How's the shaft? Maybe a little emery cloth or high-grit sandpaper to smooth it out? Then use some penetrating oil?

Tried the oil and a scotch brite pad. Tried lightly levering it from the backside still no go.

 

[exmaxima1]

Tried the oil and a scotch brite pad. Tried lightly levering it from the backside still no go.

How's the other end? Did it come off? If both won't slide off, I'd suspect a clip, but if one slides off the other must have a burr on the shaft holding it.

Also, those old grinders often had a key to keep the inner flange from spinning on the shaft. Many times it was a woodruff, and it might be holding it onto the shaft. Looks like a puller will be in order....

 

[macgee]

I am trying to get the back wheel flange off and it it is not coming. It spins free on the shaft and moves in and out a bit. I can't see any kind of set screw or e-clip behind it. Any thought on how to remove it?

You'll need a gear puller. I had a similar problem on a different machine. The shaft is hardened.

 

[Outlawmws]

Be VERY careful with a puller, as that pot metal flange won't take a lot of bend moment.

Get the jaws lined up on those gussets, and if possible, get something under the back edge to spread the load.

 

[EOC_Jason]

Exactly why do you want to take it off? If it ain't broke....

 

[toolferone]

Exactly why do you want to take it off? If it ain't broke....

Fair question. I want to take the cover off so I can put a wire wheel on it and have good access all around. I have a big grinder fopr my grindng wheels.

 

[toolferone]

How's the other end? Did it come off? If both won't slide off, I'd suspect a clip, but if one slides off the other must have a burr on the shaft holding it.

Good idea, I had not thought of trying the other side. Will do in the morning and see what happens.

 

[exmaxima1]

Fair question. I want to take the cover off so I can put a wire wheel on it and have good access all around. I have a big grinder fopr my grindng wheels.

If those grinders are anything like the Dunlop motors of that era, there will be access covers over the bearings, and you will be able to flush them out with solvent and re-grease them. Maybe you will get another 50 years out of them...

 

[lilredex]

Here is a gem, described as a "Hoover" and it is for sale....$40.

http://www.kijiji.ca/v-power-tool/c...40/1235672200?enableSearchNavigationFlag=true



++I am not the vendor, saw it while cruising the local KIJIJI ads. Could not find anything like it any where)++

 

[Oregon rock crusher]

Here is a gem, described as a "Hoover" and it is for sale....$40.

++I am not the vendor, saw it while cruising the local KIJIJI ads. Could not find anything like it any where)++

That is a pretty neat old grinder. A search of Kingston-Conley Elect Co. / Hoover grinder may turn something as there were some grinders made by them. Ed.

 

[lilredex]

There are a few over on OWWM, but nothing like this one or other belt drive versions. Nothing interesting comes up on an image search either.

 

[Oregon rock crusher]

Here is a grinder that caught my eye recently. It was the name cast into the pedestal that was most interesting to me. Of course it didn't turn out to be a Weaver grinder sitting on the stand but still kind of neat. J G Blount made several sizes of belt driven grinders around 100 years ago and this was their #2 which could take a 10" wheel but seems more comfortable with 8" wheels.

This was back in the day when guards were only supplied as optional equipment in the catalog. I really like the design of the shatter guard at the top of the guards. I only got the one but can fab the other. Both tool rests are the right style but one may be a replacement from a later grinder. This one spins super smooth and quiet on Babbitt bearings. I think the pedestal is the base of an old Weaver tire changer. Here's a couple of pics. Ed.

 

[454ragtop]

Oregon RC I have the same, or very similar, grinder minus the stand and guards, stashed away in my rathole. Thought I might find a use for it someday.

 

[Oregon rock crusher]

Oregon RC I have the same, or very similar, grinder minus the stand and guards, stashed away in my rathole. Thought I might find a use for it someday.

As for use I'll probably give one of my newer bench grinders to a son to make some room. I've had a soft spot for this style grinder every since I was a kid. My uncle helped me prepare an old Mauser 98 rifle kit for blueing about 45 years ago in his modest shop. His grinder was very similar to this but with the motor mounted on the bench behind. It left a deep impression on me how darned useful that set up was and how accessible the wheels were without the motor in the way. He had a buffing wheel on one side and big sticks of buffing compounds which brought out a brilliant finish. Ed.

 

[joe.striper]

Awesome, that may be the coolest vintage grinder/buffer I've ever seen. Have 4 pedestal grinders now, don't need any more, but if I found one like that I'd snap it up in a heartbeat. Can't make out the tag, how many amps is that? Can probably get a 115 volt in VFD to run that, work out slick.
Congrats.

How's this?

 

[FMC1959]

How's this?

The lace gives it grandeur, it IS a Snap On

 

[exmaxima1]

The lace gives it grandeur, it IS a Snap On

Technically, it's a Wissota grinder, but indeed a very unique version.

 

[torqueman2002]

Baldor grinder on Michigan CL. no affiliation

"1 1/2 hp 10" baldor pedestal grinder - $250 (Middleville)"

Baldor 1 1/2 hp ,10" pedestal grinder, on baldor cast iron pedestal base,220/440,3 phase,lights,shields,$250.00,obo,

https://grandrapids.craigslist.org/tls/5999479495.html

3-phase machines go relatively cheap in these parts.

 

[CrotalusAtrox]

Found a Blue Point 1/2 HP 7 inch grinder today cleaned it up with some kroil and steel wool hit the tool rest with the wire wheel this runs as smooth or smoother then my Baldors. It came with a dreaded three leg stand but after further inspection realized it was heavier then the asian ones and was made by Dayton in Chicago. The base is cast base so a bit more stable then most three legged ones.

 

[exmaxima1]

Found a Blue Point 1/2 HP 7 inch grinder today cleaned it up with some kroil and steel wool hit the tool rest with the wire wheel this runs as smooth or smoother then my Baldors. It came with a dreaded three leg stand but after further inspection realized it was heavier then the asian ones and was made by Dayton in Chicago. The base is cast base so a bit more stable then most three legged ones.

I'm confused: are you saying the BASE was made in Chicago? Dayton is not a manufacturer, only a distributer, so it is difiicult to determine who/where any Dayton products come from. The grinder looks like an early Doerr to me.

 

[CrotalusAtrox]

Here is what is cast into the base. Dayton Electric Mfg Chicago. My comparison for weight and base style was this style pic on the right, this one seems more stable but maybe it's just the length of the legs, it still may be made in Asia.

 

[MissileBear]

I came across a 3-legged stand like that a while back at a flea market. I cannot remember the name that was stamped on it (wasn't a name I was familiar with) but it was US made and definitely heavier than the HF style you see everywhere. The stand was beat and priced way too high so I passed.

My assumption is that this style was copied overseas as it would be easier to ship disassembled than a 1 piece pedestal stand.

 

[ALLFAST]

I saw this awesome Thor (and all of the other models of course) while searching for guards and the black crinkle paint came into discussion.

This is from a WWII Jeep restorers forum. This electronic box cover is painted with genuine Hrley Davidson Engine Black Wrinkle Aerosol. The Eastwood Company sells a version, but the HD product is known to be highly reputable.

I'm going to try some on a project of my own soon.

 

[bagged89s10]

Check out this little walker turner bench grinder I picked up.



If anyone is selling any guards or tool rests for this guy please let me know. If I can't find any, I think this might become my buffer.

Also looking for a recreated printable badge. I'd like to restore the current one but it's way too faded.

 

[Shiftless]

bagged:
That grinder rocks!
I love the super heavy duty tool rests and of course the motor label

 

[bagged89s10]

bagged:

That grinder rocks!

I love the super heavy duty tool rests and of course the motor label

Thanks. It's only a 6" 1/3 HP but It's probably as powerful or more powerful than my 1/2 HP craftsmans that I own. Unfortunately one of the original tool rests is missing and the right side shields are cracked.

 

[exmaxima1]

Thanks. It's only a 6" 1/3 HP but It's probably as powerful or more powerful than my 1/2 HP craftsmans that I own. Unfortunately one of the original tool rests is missing and the right side shields are cracked.

That grinder was made by Kingston-Conley (they made many grinders for other companies), and you're right that it is as/more powerful than your block grinders. I used the 1/2hp version for my "Frankenstein" belt grinder, and it is by far more powerful than any 7"-8" grinder I own. I would suggest that you replace the bearings as they will be dried out, and revarnish the windings, to get another lifetime from that fine machine.

 

[Shiftless]

Here's a shot of my Blue Point grinder. Newer no doubt. Who made this one?

 

[Shiftless]

bagged:
Go back to posting #1107 on page 56 to see this...