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  1. 31st January 2010, 02:29 PM #1
    pipeclay
    pipeclay is offline GOLD MEMBER
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    Default Cone Pulley Gear Sizes

    Just wondering if any of the members of this forum who have Stripped the Main Spindle would be able to tell me the length of the Gear Teeth on there Cone Pully.

    Also could you let me know what model Lathe it is please.
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  3. 2nd February 2010, 12:19 PM #2
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    HavinaGo
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    Hi Pipeclay,

    Assuming length is parallel to the spindle, I took the cover off and measured my 1973 model AR with the gear in place and found the teeth to be a little under 16.5mm long (16.4mm to my best eyeball using a pair of dividers just slipped over the ends of the teeth and then transferring the measurement to a vernier calliper)

    This is a V belt cone pulley. 37 teeth, tooth height 3.45-3.5mm

    Hope that helps.
    cheers
    David

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  4. 2nd February 2010, 02:11 PM #3
    pipeclay
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    Thanks David,the reason why Im asking is that I have a couple of Cone Pulleys with Broken Teeth that I am replacing and I have noticed that they are 5/8" and 1/2" in length.

    The overall length of the Cone Pulley also differs by this amount,just not sure what the Shorter of the Two fits.

    If its not to much trouble could you Double check the Tooth count as I thought they were 38 Teeth,also if you dont mind could you count the teeth on the Large Back Gear.

    The reason being is that I know the BackGear tooth count does vary,and if your Cone Gear pullet is 37 Teeth then I might of found out the reason why the Back Gear Tooth count varies on the Large Gear.
  5. 2nd February 2010, 02:54 PM #4
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    HavinaGo
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    Unless I'm going blind 37 on small cone pulley and 61 on large back gear mating to it.

    overall length of cone pulley and small gear is ~102.9mm
    cheers
    David

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    A society grows great when old men plant trees whose shade they’ll never sit in. (Greek proverb)
  6. 2nd February 2010, 04:06 PM #5
    pipeclay
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    Thankyou David.
  7. 2nd February 2010, 08:23 PM #6
    brittleheart
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    Just to add to the info, the Sheraton clone has 38 teeth, 5/8" long gear teeth, is 16DP at 20 deg, overall length is 4-1/8".
    As I thought they were inter changeable, can someone confirm the length with a Hercus?
    Peter
  8. 3rd February 2010, 01:12 AM #7
    pipeclay
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    Apart from the PA the other sizes are the same for one type that I have repaired,although I think Sheraton are all B section Pulleys.
  9. 3rd February 2010, 07:17 AM #8
    brittleheart
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    Yes, thats right. They have a wider section pulley.
    The downside from this arrangement, is the section left is very thin, and the lip is liable to crack.
    Peter
  10. 5th February 2010, 11:31 AM #9
    Rebo
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    Default Cone Pulley Gear

    Hi Pipeclay,

    The cone pulley gear on my Model C, serial number 7852, has a tooth width of 15.95 mm, ie 5/8 inch. Teeth count is 37 and approximate diameter of the gear is 63.45 mm. ie 2 1/2 inch.

    Rebo
  11. 5th February 2010, 12:30 PM #10
    pipeclay
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    Thankyou Rebo,I hope someone who reads this thread might be able to shine some light on why there are different tooth counts on the Cone Pulley and Back Gears,
    All the Diameters that I have come across are all the same,just the tooth counts vary.
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