The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > The Smithy

Reply
 
Thread Tools Search this Thread
Old June 26, 2010, 10:22 AM   #1
RimfireChris
Senior Member
 
Join Date: April 27, 2010
Location: Pacific Northwest
Posts: 421
Need some advice about drift punches

So, I'm gonna disassemble my Model 60 bolt before I start polishing it, and I'm gonna need some punches. Looking in my idway catalog, there's several different types, and I'm not sure if I go with roll pin punches or center punches. There's also a type called transfer punches I've not heard of before. I've tried once with a punch I made from some brass stock I had, but I guess it was too soft, and I had a ***** of a time getting the one pin I took out back in, so I figure I'll be netter off getting a good set. Also, should I get brass or steel? Any help will be greatly appreciated, thanks in advance.
RimfireChris is offline  
Old June 26, 2010, 10:40 AM   #2
brickeyee
Senior Member
 
Join Date: December 29, 2004
Posts: 3,351
Get a decent set of Starret pin punches in steel.

Brass is used when you are driving something that is not really set up for a punch.

Like drifting a sight.

There is not a real place on them for a punch, and you do not want to mar the sight.

Roll pin punches have a raised area on the tip to enter inside the roll pin and center up the punch on the roll pin.

Transfer punches are slightly undersized with a point on the end.
they are used to transfer hole locations froin on item to another.
Place punch in hole of first item clamped on second item.
Strike punch.
Move punch to the next hole.
Strike punch.
the hole pattern is transferred to the second piece.

Brass often comes fully tempered and is not very suitable in that state for punches (though it machines easily, especially if it is leaded).
brickeyee is offline  
Old June 26, 2010, 01:06 PM   #3
RimfireChris
Senior Member
 
Join Date: April 27, 2010
Location: Pacific Northwest
Posts: 421
Thanks man, that's really helpful!
RimfireChris is offline  
Old June 28, 2010, 07:38 PM   #4
James K
Member In Memoriam
 
Join Date: March 17, 1999
Posts: 24,383
If the pins are flat on the ends, regular drift punches should work fine. If they are convex (domed) as in many old revolvers, you want cup tip punches to avoid flatening the pins.

Jim
James K is offline  
Old June 29, 2010, 11:08 AM   #5
RimfireChris
Senior Member
 
Join Date: April 27, 2010
Location: Pacific Northwest
Posts: 421
Thanks, I'll keep that in mind for the future.
RimfireChris is offline  
Old June 29, 2010, 01:35 PM   #6
Old Grump
Member in memoriam
 
Join Date: April 9, 2009
Location: Blue River Wisconsin, in
Posts: 3,144
Bite the bullet and get the best you can afford, it isn't something you will have to replace anytime soon and a variety will serve you better than trying to make one type the do all punch. My good ones are flat, cupped and brass flat. The rest are oddball stuff I picked up at auctions and yard sales but my good punches are kept clean and stored in their holder when not in use and not dumped in a drawer or tool box.

Those odd punches get used, abused, ground for specific jobs, get rusty, break and/or disappear. They do not get used on my guns.
__________________
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.
--Daniel Webster--
Old Grump is offline  
Old July 3, 2010, 09:15 PM   #7
gyvel
Senior Member
 
Join Date: August 30, 2009
Location: Northern AZ
Posts: 7,172
Quote:
Brass is used when you are driving something that is not really set up for a punch.
Be advised that brass punches can become work hardened after a period of time and will mar relatively soft steels such as those used in sights.

You are better off using aluminum punches or drifts for that type of application. (Drifting sights, etc.) The aluminum will leave silver marks on whatever you are hitting, but those marks will clean off with solvent and there will be no marring or denting of the steel.

As far as general use for drifting pins, etc, I agree with everyone else that you should get a good set of Starretts, although I have had fair success with Sears Craftsman punches, too, and they will replace them if they break or bend.
gyvel is offline  
Old July 4, 2010, 09:53 AM   #8
RimfireChris
Senior Member
 
Join Date: April 27, 2010
Location: Pacific Northwest
Posts: 421
Thanks for the input, I didn't think about that aspect of the punches from Sears. And for right now, they'll only be used on the pins in a Marlin 60 and 795 bolt, so steel is just fine.
RimfireChris is offline  
Old July 17, 2010, 03:38 PM   #9
HiBC
Senior Member
 
Join Date: November 13, 2006
Posts: 8,283
Good advice,I'll add a small point.
Even with a fine set of Starrett punches,trying to drive anything stubborn with a small (1/16) punch is not likely to end well.
To get things started,it is best to use a starter punch.These carry the taper nearly to the tip.A bent 1/16 punch can usually be cut off for a starter punch.
To go along with this,unless rust or peening have given a pin a reason to be stubborn,a good thought to keep in mind "Don't force parts"
Some pins are not intended to be removed with ordinary disassassembly.They may be staked or pressed.Some pins,as on a 1911,have very small heads,and some are tapered,as on M-16 front sight /gas blocks.
As a general rule,if a pin won't just tap out with a small hammer,a bigger hammer or more white knuckles may not be the best plan.
A cup of coffee,call a buddy,look over a dis-assembly /assembly manual,etc is often wise.
HiBC is offline  
Old July 17, 2010, 07:48 PM   #10
gyvel
Senior Member
 
Join Date: August 30, 2009
Location: Northern AZ
Posts: 7,172
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

What he said.
gyvel is offline  
Old July 18, 2010, 09:10 PM   #11
Big Shrek
Senior Member
 
Join Date: August 6, 2009
Location: NorthWest Florida
Posts: 1,358
A good set of punches makes a LOT of things easier on Marlin semiauto rifles...

Especially trigger jobs...

Although...Rimfire Technologies makes a new Adjustable drop-in trigger that fits their Aluminum Trigger Guards which uses screw-pins, which you use allen head wrenches on...and they are VERY easy to deal with, not to mention longer lasting than the OEM T/G's.
__________________
Marlin Specialist
Calico Specialist
A gun should be a tool in the hands of a deadly weapon, not a deadly weapon in the hands of a tool.
Big Shrek is offline  
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:28 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2021 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Page generated in 0.07372 seconds with 10 queries