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RATCHET HOLDBACKS

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Click on image for a detailed view and for Table Reference.

Note: A protective guard is recommended for this holdback.

Diameter Ratchet A Maximum Torque in Inches Lbs. Range of Bores Inclusive Weight Lbs.
12 45,000 1 15/16 - 3 15/16 110
16 3/4 75,000 3 7/16 - 5 7/16 290
21 1/2 150,000 3 15/16 - 6 1/2 600
28 250,000 4 15/16 - 7 1/2 880
Diameter Ratchet A Dimentions in Inches
B C D E F G H J K L
12 10 1/4 1 1/4 5/8 4 3/8 2 3/4 7/8 7/8 5 3/8 5 3/8 5
16 3/4 13 1/2 1 5/8 5/8 3 9/16 3 9/16 1 1/8 7/8 6 3/8 6 3/8 6 3/8
21 1/2 17 1/4 2 1/8 5/8 4 5/8 4 5/8 1 1/2 1 7 3/8 7 3/8 7 1/2
28 20 1/2 3 1 5 1/2 5 1/2 1 3/4 1 1/8 9 3/8 9 3/8 9 5/8

How to Select the Proper Size Holdback

The Torque (T), in inch-pounds, required at the shaft on which it is mounted may be found by using the equation at right.

The base should be mounted on a sufficiently rigid support designed to take an uplift load of approximately 1.5T/R where R = the radius of the T = 63,000 x HP/R.P.M. where HP = Horsepower required to run the conveyor.

T = 63,000 X HP/R.P.M.

R.P.M. = Revolutions per minute of the ratchet

Specifications subject to change without notice.

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P.O. Box 427, 107 Mildred St.
Greenville, Alabama 36037

Phone: 334.382.7121
Fax: 334.382.0815

cmattingly@the-machine-shop.com

 

 

 

 

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