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| Track Road Arm Metallurgy http://www.international2cvfriends.com/forum/viewtopic.php?f=7&t=3694 |
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| Author: | blackjack [ February 17th, 2012, 1:36 am ] |
| Post subject: | Track Road Arm Metallurgy |
I recently bought a new pair of track rod arms from the leading 2CV parts specialist. I was preparing them for paint by grinding off all the flash lines and then smoothing and polishing them - makes them look nicer too. I noticed that they were MUCH softer than the last pair I did some years ago - almost like they are just plain mild steel. They were so soft that I didn't bother with a grinder in the end, just used files and 40 through 240 grit paper. Have they always been this soft - my experience on original Citroen parts and 1930's Ford forgings are that they are a lot tougher to prep for paint and chrome. |
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| Author: | subarupete [ February 17th, 2012, 10:03 am ] |
| Post subject: | Re: Track Road Arm Metallurgy |
Perhaps they havent had any heat treatment? |
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| Author: | blackjack [ February 17th, 2012, 10:48 am ] |
| Post subject: | Re: Track Road Arm Metallurgy |
Perhaps only the ball ends have been treated on these pattern parts and the whole thing was case hardened on original parts? |
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| Author: | Sean [ February 17th, 2012, 11:47 am ] |
| Post subject: | Re: Track Road Arm Metallurgy |
dont think even the balls are treated the Ami 6 set that are now on the blue car show no effects of wear but do show signs of pitting corrosion that id expect to see on a high carbon steel guess the older ones were just a better quality steel any recent car has a ball end that is soft enough to mark with a file easily |
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| Author: | Joolz [ February 17th, 2012, 7:23 pm ] |
| Post subject: | Re: Track Road Arm Metallurgy |
Hi, if you read the bit in my thread about the balljoint conversion, I cut the arms lengthwise with a hacksaw, they didn't seem very hard to me. I've no idea whether they were original or pattern parts though. |
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| Author: | Harley [ February 18th, 2012, 7:44 am ] |
| Post subject: | Re: Track Road Arm Metallurgy |
Joolz wrote: Hi, if you read the bit in my thread about the balljoint conversion, I cut the arms lengthwise with a hacksaw, they didn't seem very hard to me. I've no idea whether they were original or pattern parts though. The hardness of these parts is something that I will be encountering myself soon. The plan is to machine the ball end down to an M8 and cut a thread into it, then fit a reducer and M 14 X 1.25 left hand thread, male rod end. As you could imagine the M 14 X 1.25 male rod end was hard to come by. I order it from India via email, so dodgy, but they did arrive, $US110 later, most of which was shipping... So, can they be machined in a lathe? Harley |
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