Thanks: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 16 to 26 of 26
Thread: Removing a mis-aligned roll pin
-
15th October 2012, 08:23 PM #16Senior Member
- Join Date
- Dec 2006
- Location
- Sunshine Coast
- Posts
- 191
-
15th October 2012 08:23 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
16th October 2012, 02:16 AM #17Senior Member
- Join Date
- Oct 2008
- Location
- Cairns, Q
- Posts
- 351
For future reference - crude, but it works wonders:
Frank.
-
16th October 2012, 07:58 AM #18GOLD MEMBER
- Join Date
- Aug 2011
- Location
- Melbourne
- Posts
- 2,951
Hi ned,
A bit late in the piece with my response but I too have had to deal with a mis-aligned roll pin. It was one of the first times I had ever dealt with or removed one. It seems to me that all roll pin holes are off centre which I did not realise until replacing and getting it most of the way in. I tried a few solutions such as the vice grips a pin punch from the other end (this found it's way either inside the pin or between the pin and the hole and added to the problem) I ended up butchering the thing to get it out. I never tried drilling it out though as I assumed they were hardened. I like the vice grip "bead breaker" that looks good!
Simon
-
16th October 2012, 10:03 AM #19GOLD MEMBER
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 7,775
On a side note. I think they often dont even try to get the pin in the middle. While I'm sure it can be done it would be a pain and if you got it "almost" right that would make it harder to be sure with was the right way around.
Stuart(the guy that managed to damage a machine driving a 1/2" dowel pin home that "almost" lined up. Not my best day )
-
16th October 2012, 12:24 PM #20Senior Member
- Join Date
- Mar 2009
- Location
- Melbourne
- Age
- 54
- Posts
- 380
All a bit academic now but another method that can work here is to fill the hole through center of the pin with grease, insert a pin punch with a diameter as close as possible to the hole and give a hit with a hammer. As long as the hole is completely misaligned and blind then the pin will hydraulic out.
The same technique works when removing bearings and bushes from blind housings.
Cheers,
Greg.
-
16th October 2012, 12:40 PM #21
shear pin
I was reading that some makers insert a shear pin in that locaton. If the leadscrew or drive shaft jams , the pin will shear and thus save other parts like gears from damage .
Mike
-
16th October 2012, 05:19 PM #22Senior Member
- Join Date
- Apr 2012
- Location
- Melbourne
- Age
- 57
- Posts
- 122
Never seen a roll pin in that position before. Have replaced a couple of taper pins for the feed shaft before.
Don't forget, you can get hardened roll pins as well.
Lucky it was a soft one to be drilled out.
-
16th October 2012, 07:00 PM #23Senior Member
- Join Date
- Dec 2006
- Location
- Sunshine Coast
- Posts
- 191
Yes, that's interesting, I don't know how you tell the difference between a soft and hard roll pin, short of trying to cut or drill it. Maybe they use soft ones in this situation so they will shear if necessary.
(EDIT. Whilst mine did drill out easily, I did happen to have a cobalt drill of the correct size, which I used, expecting the pin to be hard
Cheers,
Ned
-
16th October 2012, 08:53 PM #24Senior Member
- Join Date
- Oct 2008
- Location
- blackburn vic
- Posts
- 221
I would just push it out using a pin punch form the opposite side.
Roger
-
16th October 2012, 09:20 PM #25Senior Member
- Join Date
- Dec 2006
- Location
- Sunshine Coast
- Posts
- 191
Sure, That's the way to do it if you can, but here we are talking about a pin that is mis-aligned such that the pin can't be got to with a punch from the other side. i.e. the hole wasn't drilled exactly in the centre of the shaft and it's collar, so if it is 180 deg out, then not all holes line up.
-
16th October 2012, 09:40 PM #26
Similar Threads
-
Aligned dowels in chair seat cause cup?
By JB in forum FURNITURE, JOINERY, CABINETMAKING - formerly BIG STUFFReplies: 8Last Post: 28th August 2012, 10:52 PM -
Can't keep jointer tables aligned. HEEEEEEELP!!
By elanjacobs in forum JOINTERS, MOULDERS, THICKNESSERS, ETCReplies: 0Last Post: 15th December 2010, 08:08 PM -
my planets must be aligned...almost
By mic-d in forum HAVE YOUR SAYReplies: 0Last Post: 9th July 2005, 06:10 PM -
Roll up, roll up. come see the bearded lady..
By ozwinner in forum WOODWORK - GENERALReplies: 8Last Post: 30th September 2004, 07:52 AM