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notorious KGB Samba Member
Joined: April 17, 2011 Posts: 26 Location: southern OREGON
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Posted: Fri Mar 16, 2012 12:22 am Post subject: Shortening Chromoly push rods |
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Has anyone tried to shorten chromoly pushrods that were purchased already cut and assembled to length from CB performance? |
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mark tucker Samba Member
Joined: April 08, 2009 Posts: 23937 Location: SHALIMAR ,FLORIDA
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Posted: Fri Mar 16, 2012 8:33 am Post subject: |
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it depends on how much they need shortning.if you have a lathe you can cut them down almost to the id and pull the ends out if there is enough room.but dont cut into the end shank. |
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notorious KGB Samba Member
Joined: April 17, 2011 Posts: 26 Location: southern OREGON
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Posted: Fri Mar 16, 2012 9:18 am Post subject: |
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Once cut I could press them until they seat again. Or use a type of soft mallet maybe? |
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the2ndcashboy Samba Member
Joined: March 19, 2007 Posts: 827 Location: Houston
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Posted: Fri Mar 16, 2012 9:27 am Post subject: |
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Unless you need to cut them down a lot (.250"~) you are probably going to have a hard time getting the old tips out using the undercut method. Those tips are pressed in there pretty tight. _________________
SRP1 wrote: |
You see....... He talks in code and translation requires a priest, geologist, astronomer, biophysicist, and Indiana Jones. |
modok wrote: |
If anything comes out perfect it just means your measuring tools are substandard. |
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Dale M. Samba Member
Joined: April 12, 2006 Posts: 20379 Location: Just a tiny bit west of Yosemite Valley
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Posted: Fri Mar 16, 2012 9:46 am Post subject: |
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notorious KGB wrote: |
Once cut I could press them until they seat again. Or use a type of soft mallet maybe? |
I use two old lifters one as a base (on anvil or solid steel object) and one as a protector from hammer blows with a real "steel" hammer..... Soft mallet is not going to be much help...
Dale _________________ “Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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notorious KGB Samba Member
Joined: April 17, 2011 Posts: 26 Location: southern OREGON
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Posted: Fri Mar 16, 2012 9:56 am Post subject: |
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sure just watch I dont bend them. I have machining skills, suppose I machine them as discussed earlier ,then file the rest of the tube to the OD of the insert. Without taking it out , just push it till it bottoms. Being carefull not to damage the insert OD badly other than light file marks. Maybe |
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UK Luke 72 Samba Member
Joined: September 07, 2011 Posts: 2867 Location: Little Britain
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Posted: Fri Mar 16, 2012 9:58 am Post subject: |
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Not sure about CroMo's but with stock pr's you can pein them just slightly around the circumference just below the end and the will eventually work loose |
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ap_sand Samba Member
Joined: November 07, 2008 Posts: 249 Location: Woodinville, WA
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Posted: Fri Mar 16, 2012 12:06 pm Post subject: |
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After figuring out exactly how long they needed to be (didn't want to do it twice), I used a fiber reinforced cutoff wheel in a dremel.
Marked the location of the cut line with tape and with the rod clamped in a vice carefully cut deeper at the line until through the wall. Nibbled out a line to the underside of the tip then used the corner of a chisel to spread the ring enough to fall off.
Tapped the end in between two old lifters. |
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notorious KGB Samba Member
Joined: April 17, 2011 Posts: 26 Location: southern OREGON
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Posted: Fri Mar 16, 2012 2:29 pm Post subject: |
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Great. You see I got some CB 044 mags that have CR's lower than I want. Cutting them down is going to make my Push Rods long. As is they are a little long due to the swivel feet.
Thanks everybody, hoping it was not to difficult to modify for what I will have to do. |
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