RATCHET HOLDBACKS

Click Here to VIEW OTHER HOLDBACKS

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
Diameter Ratchet A	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.

P.O. Box 427, 107 Mildred St. Greenville, Alabama 36037	Phone: 334.382.7121 Fax: 334.382.0815
cmattingly@the-machine-shop.com