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Thread size for WEN adjustible chuck

danasummers1

Plastic
Joined
Jun 18, 2022
Does anyone know the thread size for the WEN 2305-KC Keyless Rotary Tool Chuck and where I can purchase a die to cut the same size threads on round stock?
 

L Vanice

Diamond
Joined
Feb 8, 2006
Location
Fort Wayne, IN
It was not very difficult to find your answer on the Amazon Q&A section for the Wen chuck.

"Question:
Will this fit Dremel tool?
Answer:
NO IT WILL NOT FIT DREMEL OR ANY OTHER TOOLS UNLESS THEY HAVE AN M8 x 0.85mm Thread
I have been searching for hours, until I found that the WEN 2305/2307 Collet thread is an M8 x 0.85mm (30 threads per in) -"

That is very close to 5/16-30. Victor has the die for $11.50.

Larry
 
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danasummers1

Plastic
Joined
Jun 18, 2022
It was not very difficult to find your answer on the Amazon Q&A section for the Wen chuck.

"Question:
Will this fit Dremel tool?
Answer:
NO IT WILL NOT FIT DREMEL OR ANY OTHER TOOLS UNLESS THEY HAVE AN M8 x 0.85mm Thread
I have been searching for hours, until I found that the WEN 2305/2307 Collet thread is an M8 x 0.85mm (30 threads per in) -"

That is very close to 5/16-30. Victor has the die for $11.50.

Larry
Larry if I use the 5/16-.30 die what diameter round stock metal solid tubing would I used to cut the threads?
 

Joe Gwinn

Stainless
Joined
Nov 22, 2009
Location
Boston, MA area
How is 30 threads per inch derived from M8 x 0.85mm? Thanks

It isn't, but they are close. But not close enough to interwork without jamming unless the fit is quite loose. I'd test this with nuts and bolts from a local hardware store.

If Wen uses M8x 0.85 mm, it's best to use exactly that.
 

L Vanice

Diamond
Joined
Feb 8, 2006
Location
Fort Wayne, IN
A 5/16 inch thread can be cut on stock that is 5/16 inch diameter. Some material is easier to thread with a die than other materials. Experience helps, but keep in mind that a chamfer on the end of the stock is a minimum requirement.

I wonder if Joe Gwinn, whose location is stated as Boston, MA area, really has a local hardware store that stocks 5/16-30 nuts and bolts.

If that Amazon reviewer gave accurate information, I have great confidence that a Wen chuck will screw on to a 5/16-30 thread without jamming until the internal shoulder hits the end of the male thread. I have less confidence that it is a good idea, but the idea was never explained.

Larry
 

Joe Gwinn

Stainless
Joined
Nov 22, 2009
Location
Boston, MA area
I wonder if Joe Gwinn, whose location is stated as Boston, MA area, really has a local hardware store that stocks 5/16-30 nuts and bolts.
Hmm. Good point. Probably not, as 5/16-30 is not a standard size. So, we are back to M8x0.85, which is also not so common, judging by what McMaster carries. So it's a custom job either way, so might as well make it exactly M8x0.85, perhaps starting with 5/16" (7.94mm) stock, perhaps oversize.
 

Scottl

Diamond
Joined
Nov 3, 2013
Location
Eastern Massachusetts, USA
At this point I must ask; Why are you so determined to put a Wen chuck on a shaft?

If it's to make a custom arbor I'd pick a more common size.

If it's to make a wide range pin vise such tools already exist such as the one from General.

M8 x 0.85 would be a special order die as it is a non-standard size.
 

Scottl

Diamond
Joined
Nov 3, 2013
Location
Eastern Massachusetts, USA
Hmm. Good point. Probably not, as 5/16-30 is not a standard size. So, we are back to M8x0.85, which is also not so common, judging by what McMaster carries. So it's a custom job either way, so might as well make it exactly M8x0.85, perhaps starting with 5/16" (7.94mm) stock, perhaps oversize.
No lathe, no chance. The die would be so expensive that it would be cheaper to cannibalize a Wen tool for the shaft.
 
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Joe Gwinn

Stainless
Joined
Nov 22, 2009
Location
Boston, MA area
I've lost the bead. Aren't we trying to achieve M8x0.85, which sounds like something Victor (and others) can easily do, as they are already close?
 








 
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