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  • Gear cutter question??

    Hey all!
    I can't remember this...if a cutter IS NOT marked as to which PA it is...do we assume it is 20 deg?
    I was just going through some cutters I got off Fleabay a while ago and one is a 14 1/2 deg. It's marked on the side that you couldn't see in the picture. I forgot to ask..grrr!
    Just wondering for future purchases.
    (Ha...I scored three 14DP cutters today!)
    Thanks!
    Russ
    I have tools I don't even know I own...

  • #2
    Never had that problem before.I wouldn't assume that thou.it would be imbarassing to cut a gear and hand it to a customer only to hear"uhhhh...this thing don't mesh"
    I just need one more tool,just one!

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    • #3
      I don't think that's a valid assumption. I think the most you can assume is that it's probably not the P.A. you need at the time.
      ----------
      Try to make a living, not a killing. -- Utah Phillips
      Don't believe everything you know. -- Bumper sticker
      Everybody is ignorant, only on different subjects. -- Will Rogers
      There are lots of people who mistake their imagination for their memory. - Josh Billings
      Law of Logical Argument - Anything is possible if you don't know what you are talking about.
      Don't own anything you have to feed or paint. - Hood River Blackie

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      • #4
        It is probably safer to assume an unmarked cutter is 14-1/2*, as many were made before 20* existed.
        Jim H.

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        • #5
          Thanks for the advice guys...LMAO!
          JC...I think I had it backwards then. Like I said...I couldn't remember. I think Sir John may have told me that last year...for all the good it did....lol!
          Thanks again!
          Russ
          I have tools I don't even know I own...

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          • #6
            If those were the cutters from Canada, they were "Bevel Involute" gear cutters for cutting bevel gears, not the same as normal 14-1/2آ° PA involute gears. The cutter's tooth profile is more straighter than the normal involute cutter. I was out bid on the 6-16 DP "bevel involute" 14-1/2آ° cutter.

            ------------------
            Doug
            Doug

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            • #7
              <font face="Verdana, Arial" size="2">Originally posted by vmil3:
              If those were the cutters from Canada, they were "Bevel Involute" gear cutters for cutting bevel gears, not the same as normal 14-1/2آ° PA involute gears. The cutter's tooth profile is more straighter than the normal involute cutter. I was out bid on the 6-16 DP "bevel involute" 14-1/2آ° cutter.

              </font>
              Doug...that'd be the ones. I knew they where for bevel gears but didn't read up about the difference in the PA. JT's writeup about cutting bevel gears sparked my interest. I did see a few people bidding on the cutter you where after.
              Russ

              I have tools I don't even know I own...

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