flattening the RR tracks



I DID THE SAME CUYS WITH DIFFERENT METAL WITH MUCH BETTER RESULTS. PRATT & WHITNEY MODEL B ,12 X 30 LATHE.
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14 thoughts on “flattening the RR tracks”

  1. Hello Kimber. I did that exact job some years ago. It will eat hss for breakfast. Tipped tools only. I made another and made a flycutter and used the milling machine to face it. If you look way back in my videos there is a 4 part series. Making a railroad anvil on a 4×6 bandsaw.

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  2. No doubt about having your carriage lock LOCKED ! Tighten down the toolpost too – just a little bit loose , & the tool pressure alone can jog the tool path ! * gibs 'very slightly ' snugged down . . . ** Your cross slide nut should have ZERO to do with those tool marks , 'IF' the cross slide gib is properly adjusted , ( nearly zero play ) Indeed the carriage lock would be the BEST solution – – – * I've mentioned many times how to measure & make a shim to allow that square headed bolt to WORK ! It's a really easy FIX ! ! !
    Rail can be highly variable in hardness , consider how much pounding it got when in use , the weight of full cars is CONSIDERABLE . . . which work hardens the surface !
    Adding the interrupted cut to the equation makes for tough going – ESPECIALLY if yo.u can't control the speed & feed according to the diameter – – – 'gotta go faster rpm near the center of the cut . . . 'not easily done without stopping the feed , increasing the speed while hand feeding ! ( double pffffft pfffffffffffft FART NOISE ! )
    ** If you're shooting for FLATNESS , 'might be a good idea to fix the carriage lock – take a light cleanup cut on the top surface of the rail . . . THEN flop the top face toward the chuck , & take a stab at cleaning up the bottom surface ! * In the olden days , a job like this would likely be done on a faceplate . . . depending on the mood / ability of the worker . . .

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  3. hi KZ
    There are many variables to consider, speed, feed, tool profile, tool ridgidity machine ridgidity, lubricant, etc etc, and the other variable is the material, its probably work hardened over years of use with harder spots in different places. it's a trial and error job!! good luck
    cheers
    Kev

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