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Tractor Pulling Discussion Forum

Re: need machinists advice

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03-14-2014 19:01:39

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Thanks guys. I started slow (75 rpm) to knock down the spot I built up, and then I went up to 158 to finish it off. The top came out nice but when I trued up the inside I found three little hairline cracks, beneath the area I built up so I have to decide how to go about fixing them. Now that the pulley is trued up on the outside I'd hate to warp it with another heating sequence. All of the guys in the shop don't think they'd ever be a problem at the low rpm's that it'll be turning but I don't know if I can get used to the idea of having cracks in something spinning so close to my right foot.

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03-14-2014 19:39:55

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 Re: need machinists advice in reply to clampdaddy, 03-14-2014 19:01:39  
Thanks for asking a legitimate question. Its a shame that a legitimate question only gets six replies. Makes you wonder where all the expert machinist are doesnt it

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03-15-2014 11:53:27

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 Re: need machinists advice in reply to mlpankey, 03-14-2014 19:39:55  
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Yeah, because your expert response was backed up by showing the math on how to figure out surface feet per minute and referring to validated charts such as those published in the machinists handbook.
Get a life troll. The previous responses were 100 x more valuable than the two bits you posted. Some expert you are.

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