Dremel - Scroll Saw Woodworking & Crafts Message Board

Chase · 05-19-2009, 07:33 PM

I did something dumb. I rounded off the threads on the tip of the drive coming out of my Dremel.

I know its 9/32 in diameter. I plan on using a die (as in tap and die-hope I'm spelling it right) to rethread the end so I can get the attachments to screw on.

My problem is I don't know the threads per inch so I don't know which die to buy.

Help.

Chase

BobD · 05-19-2009, 07:41 PM

Chase, can you take the nut that threads onto the Dremel to a hardware store and match it to a bolt or tap?

Chase · 05-19-2009, 07:44 PM

Did that at Home Depot. They don't have that size. In the process of searching the net.

Chase

BobD · 05-19-2009, 07:55 PM

of course...they wouldn't have that size...

If all else fails, Lee Valley has a new thread restoring tool that's supposed to work on any thread/pitch

Have you tried a knife file? If you can get the first few threads fixed, you may be able to use the nut to restore the other threads...

Bob

Chase · 05-19-2009, 08:53 PM

Tried the file, I'm to timid to get really aggressive. Found dies on line in 32 and 40 threads per inch. Also sent an e-mail to Dremel.

Going to look at Lee Valley.

Thanks Bob.

Chase

KtownScroller · 05-19-2009, 10:30 PM

Chase - Lay a ruler along side of the threads and count the threads per inch. If you don't have a whole inch you might have to do a little math. Say the threads only measure 1/2" long then count the threads and multiple by 2. A magnifying glass might come in handy.

Just beware, the threads might be metric. If so, take note that 9/32" diameter equals 7.1438 mm.

Good luck.

KtownScroller · 05-19-2009, 11:10 PM

Chase - I checked my Dremel tool spindle. It mic's .275. That equals 7mm. The only 7mm thread I can find is M7 x 1.0 (pitch). You might have a hard time finding a die at Lowe's or Home Depot. You might have to order one or see if you can order a new spindle from Dremel.

See chart: http://www.jarviscuttingtools.com/_p...nformation.pdf

Rolf · 05-20-2009, 05:38 PM

The best and fastest place to find things like this unless you have a local machinest supply is MC Master Carr
McMaster-Carr
Or MSC
Industrial Equipment - Browse the Big Book online at MSCDirect.com

Chase · 05-20-2009, 08:44 PM

Gt a response from Dremel. Said the diameter was "Thread size for the output shaft on current Dremel rotary tools is .28 x
40 threads per inch and is unique to this type of tool. "

I think the diameter is .28125

I really appreciate all the help.

Chase

KtownScroller · 05-20-2009, 09:14 PM

Quote:

Originally Posted by Chase

Gt a response from Dremel. Said the diameter was "Thread size for the output shaft on current Dremel rotary tools is .28 x
40 threads per inch and is unique to this type of tool. "

I think the diameter is .28125

I really appreciate all the help.

Chase

So does this mean you are up the creek without a paddle?

Are you going to order the armature & bearing assembly?

05-19-2009, 07:33 PM	#1
Chase Seasoned WV Veteran Join Date: Apr 2005 Location: Virginia, Born/Raised WV Posts: 727	Dremel I did something dumb. I rounded off the threads on the tip of the drive coming out of my Dremel. I know its 9/32 in diameter. I plan on using a die (as in tap and die-hope I'm spelling it right) to rethread the end so I can get the attachments to screw on. My problem is I don't know the threads per inch so I don't know which die to buy. Help. Chase __________________ Chase---Cleverly Disguised As A Responsible Adult. Visit my album @ http://home.comcast.net/~chasesmeeks...-by-Chase.html and click on the album link.

05-19-2009, 07:41 PM	#2
BobD Technical Editor Join Date: Aug 2004 Location: Lebanon, Pa Posts: 3,028 Blog Entries: 2	Chase, can you take the nut that threads onto the Dremel to a hardware store and match it to a bolt or tap? __________________ www.WoodCarvingIllustrated.com www.FoxChapelPublishing.com www.ScrollSawer.com Shopsmith, Hawk G4

05-19-2009, 07:44 PM	#3
Chase Seasoned WV Veteran Join Date: Apr 2005 Location: Virginia, Born/Raised WV Posts: 727	Did that at Home Depot. They don't have that size. In the process of searching the net. Chase __________________ Chase---Cleverly Disguised As A Responsible Adult. Visit my album @ http://home.comcast.net/~chasesmeeks...-by-Chase.html and click on the album link.

05-19-2009, 07:55 PM	#4
BobD Technical Editor Join Date: Aug 2004 Location: Lebanon, Pa Posts: 3,028 Blog Entries: 2	of course...they wouldn't have that size... If all else fails, Lee Valley has a new thread restoring tool that's supposed to work on any thread/pitch Have you tried a knife file? If you can get the first few threads fixed, you may be able to use the nut to restore the other threads... Bob __________________ www.WoodCarvingIllustrated.com www.FoxChapelPublishing.com www.ScrollSawer.com Shopsmith, Hawk G4

05-19-2009, 08:53 PM	#5
Chase Seasoned WV Veteran Join Date: Apr 2005 Location: Virginia, Born/Raised WV Posts: 727	Tried the file, I'm to timid to get really aggressive. Found dies on line in 32 and 40 threads per inch. Also sent an e-mail to Dremel. Going to look at Lee Valley. Thanks Bob. Chase __________________ Chase---Cleverly Disguised As A Responsible Adult. Visit my album @ http://home.comcast.net/~chasesmeeks...-by-Chase.html and click on the album link.

05-19-2009, 10:30 PM	#6
KtownScroller Wooden Clockman Join Date: Nov 2008 Location: PA Posts: 2,562	Chase - Lay a ruler along side of the threads and count the threads per inch. If you don't have a whole inch you might have to do a little math. Say the threads only measure 1/2" long then count the threads and multiple by 2. A magnifying glass might come in handy. Just beware, the threads might be metric. If so, take note that 9/32" diameter equals 7.1438 mm. Good luck. __________________ - Rick

05-19-2009, 11:10 PM	#7
KtownScroller Wooden Clockman Join Date: Nov 2008 Location: PA Posts: 2,562	Chase - I checked my Dremel tool spindle. It mic's .275. That equals 7mm. The only 7mm thread I can find is M7 x 1.0 (pitch). You might have a hard time finding a die at Lowe's or Home Depot. You might have to order one or see if you can order a new spindle from Dremel. See chart: http://www.jarviscuttingtools.com/_p...nformation.pdf __________________ - Rick Last edited by KtownScroller; 05-19-2009 at 11:14 PM.

05-20-2009, 05:38 PM	#8
Rolf Senior Member Join Date: Apr 2005 Location: Bellport, LI New York Posts: 2,778	The best and fastest place to find things like this unless you have a local machinest supply is MC Master Carr McMaster-Carr Or MSC Industrial Equipment - Browse the Big Book online at MSCDirect.com __________________ Rolf RBI G4 Hawk, Delta SS350 Philosophy "I don't know that I can't, therefore I can"

05-20-2009, 08:44 PM	#9
Chase Seasoned WV Veteran Join Date: Apr 2005 Location: Virginia, Born/Raised WV Posts: 727	Gt a response from Dremel. Said the diameter was "Thread size for the output shaft on current Dremel rotary tools is .28 x 40 threads per inch and is unique to this type of tool. " I think the diameter is .28125 I really appreciate all the help. Chase __________________ Chase---Cleverly Disguised As A Responsible Adult. Visit my album @ http://home.comcast.net/~chasesmeeks...-by-Chase.html and click on the album link.

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