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3D printed Ratchet....Kinda
- Thread starter Tscott
- Start date
stratman977
Well-known member
This is not a new concept. That ratchet is basically a one way bearing which have been used in ratchets before. They are improving on the design by making it reversible which was a challenge for the previous designs.
Kinda a waste of money to make those handles on a 3d printer you could make those pretty easily with standard machine tools.
Kinda a waste of money to make those handles on a 3d printer you could make those pretty easily with standard machine tools.
240sxguy
Well-known member
Is that the same design as those old mac tools zero degree turn ratchets? I had one back in the day and it was really sucky.
rlitman
Well-known member
Yep same thing. The website claims:
"Ratcheting systems of all types have three key components"
Sounds like they've never heard of a sprag clutch.
There is nothing new about this concept. I had a trapped roller gearless "ratcheting" screwdriver that was reversible just like a Snap On ratcheting screwdriver around 20 years ago. If it wasn't mostly plastic, and didn't fall apart, I'd still have it. That one was super smooth.
"Ratcheting systems of all types have three key components"
Sounds like they've never heard of a sprag clutch.
There is nothing new about this concept. I had a trapped roller gearless "ratcheting" screwdriver that was reversible just like a Snap On ratcheting screwdriver around 20 years ago. If it wasn't mostly plastic, and didn't fall apart, I'd still have it. That one was super smooth.
neophyte
Well-known member
Would laser sintering produce a part with a high enough tensile strenghth for a ratchet body?
helterskelter
Well-known member
- Joined
- Mar 26, 2010
- Messages
- 296
Would laser sintering produce a part with a high enough tensile strenghth for a ratchet body?
I'm not familiar with the process but it's not going to be able to compete with the grain flow of a forged handle. But I'm also not sure I've ever seen a handle fail. Always the gear set or the drive end.
neophyte
Well-known member
I'm not familiar with the process but it's not going to be able to compete with the grain flow of a forged handle. But I'm also not sure I've ever seen a handle fail. Always the gear set or the drive end.
What I would be worried is that the steel structure would crack, rather than bend or tear, if over stressed.
joe_padavano
Well-known member
Yep same thing. The website claims:
"Ratcheting systems of all types have three key components"
Sounds like they've never heard of a sprag clutch.
Beat me to it. I was going to point out that the sprag clutch is typically the weak link in a TH400 trans.
helterskelter
Well-known member
- Joined
- Mar 26, 2010
- Messages
- 296
What I would be worried is that the steel structure would crack, rather than bend or tear, if over stressed.
I have no doubts it would crack and fail abruptly. Versus a forging which will generally bend. Not an ideal quality for a ratchet handle.
neel2008
Well-known member
Parts store salesman was at the shop the other day trying to sell "stubby" 1/4" and 3/8" "zero degree" Sprag clutch whatever ratchets like that for $25 each....Neat little guys for tight places...I probably should at least buy the 1/4" one....
steveo3002
Well-known member
ratchet sounds cool..handles look like *** , seems like its a major selling point about the handle ? no mention of what stops it flying off when youre heaving on it
240sxguy
Well-known member
The issue I had with mine was that it was too tight. You'd get a nut broken loose and unless it was super tight on the bolt you lost your "ratcheting" motion.
rlitman
Well-known member
Parts store salesman was at the shop the other day trying to sell "stubby" 1/4" and 3/8" "zero degree" Sprag clutch whatever ratchets like that for $25 each....Neat little guys for tight places...I probably should at least buy the 1/4" one....
I have a set of these and really like them:
http://www.toolfetch.com/titan-1820...4e3138323032&gclid=CIKTuIaTlLkCFWcOOgodBCQAGA
(not from them, but they're sold all over the place). They are not truly reversible though. The center shaft pushes through, so you can use it on either side to reverse.
Dave455
Well-known member
Not big news. Britool in the U.K. made these for years. Good tools. I've got one and it works really well. I think the roller clutch was bought in as a unit, from Timken or somesuch (British bearing manufacturer).
Trouble was, Britool, like so many British firms didn't advertise much towards the end, so nobody knew about their products, let alone the advantages of the roller clutch!
I've seen on others around, but all Taiwanese and nothing special!
Trouble was, Britool, like so many British firms didn't advertise much towards the end, so nobody knew about their products, let alone the advantages of the roller clutch!
I've seen on others around, but all Taiwanese and nothing special!
neel2008
Well-known member
I have a set of these and really like them:
http://www.toolfetch.com/titan-1820...4e3138323032&gclid=CIKTuIaTlLkCFWcOOgodBCQAGA
(not from them, but they're sold all over the place). They are not truly reversible though. The center shaft pushes through, so you can use it on either side to reverse.
Yep that's what he had the titan ones....Couldn't remember the name. lol They seem well worth the price.
celticbhoy
Well-known member
- Joined
- Apr 10, 2013
- Messages
- 540
God forbid you put a longer extension on your regular gear ratchet so that you're in the clear.
joe_padavano
Well-known member
Did anybody see the article at the bottom of the page, about the Japanese government funding development of 3D printers using metal instead of plastic?
-Brad
No, but so what? DARPA has been funding similar research in the US for about the last five years.
SpiderGearsMan
Banned
where does the 3d printer start and the cnc machine end ?