36" Bullard main driving pulley rpm?
Close
Login to Your Account
Results 1 to 2 of 2
  1. #1
    Join Date
    Aug 2019
    Country
    UNITED STATES
    State/Province
    Massachusetts
    Posts
    1
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    0

    Default 36" Bullard main driving pulley rpm?

    Trying to get a 1941 36" spiral drive bullard up and running.
    Can anyone tell me the proper RPM for the main driving pulley?
    The pulley is 21" in diameter.
    Trying to size the motor pulley on a 20 hp 1750 rpm motor.

  2. #2
    Join Date
    Jul 2004
    Location
    Houston, TX USA
    Posts
    29,200
    Post Thanks / Like

    Default

    Put it in top gear, engage clutch and turn pulley enough times to turn table one full turn and do the math for what ever top speed is placarded

    Say it went six turns on pulley for one full turn of table

    Say you found the top to be placarded 150 RPM

    6 times 150 is the pulley speed

    OR.....

    Same deal for lower speed if pulley too hard to turn in top gear

    Just count the turns and do the math for THAT gear's placarded speed

    On Edit... say you went all the way down to 15 RPM placarded - you would find you needed SIXTY turns.

    Pulley speed same at 15 X 60
    Last edited by johnoder; 08-16-2019 at 07:13 AM.

  3. Likes Illinoyance, Richard King liked this post

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •