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DIFFERENTIAL HOLDBACKS

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When ordering, specify diameter of holdback, bore and keyseat. Mount with base in horizontal position as shown. Do nor mount with base inclined, vertical or at top.

NOTE:The Machine Shop, Inc., will not knowingly sell or recommend a holdback for use on a ski lift or other conveyance that transports people.

 

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

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 where R = the radius of the 1.5T/braker in inches.

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

where HP = Horsepower required to run the conveyor R. P. M. = Revolutions per minute of brake wheel.

Specifications subject to change without notice.

Dia. A Max. Torque in inch lbs. Catalog Numbers of Holdbacks Complete
Bore B Catalog # Bore B Catalog # Bore B Catalog # Bore B Catalog #
8 1/4 4,800 1 3/16
2 3/16
303043
290496
11/4
2 7/16
310855
290427
1 7/16
2 15/16
290425
315939
1 15/16
. . . . . .
290426
. . . . . .
12 14,400 1 15/16
3 15/16
290415
290419
2 7/16
. . . . . .
290416
. . . . . . .
2 15/16
. . . . . .
2904107
. . . . . . .
3 7/16
. . . . . .
290418
. . . . . .
18 38,000 1 15/16
3 15/16
290449
290452
2 15/16
4 7/16
290450
290453
3 7/16
4 3/4
290451
308649
3 11/16
4 15/16
302691
290454
24 102,000 3 7/16
5 7/16
290471
290475
3 15/16
. . . . . .
290472
. . . . . . .
4 7/16
. . . . . .
290473
. . . . . . .
4 15/16
. . . . . .
290474
. . . . . .
30 170,000 4 7/16
6 7/16
290485
290489
4 15/16
. . . . . .
290486
. . . . . . .
5 7/16
. . . . . .
290487
. . . . . . .
5 15/16
. . . . . .
290488
. . . . . .
Dia. A weight in lbs. Dimensions in inches
Holdback Housing C D E F G H J K L M N P Q
8 1/4 40 12 3 4 7/16 6 2 1/8 5/8 1 7/8 2 3/8 6 1/2 1/2 2 5/8 1 11/16 5 1/4 4
12 75 15 3 7/8 6 3/8 8 2 7/8 3/4 2 1/2 3 1/4 8 1/2 3/4 3 5/8 2 3/16 7 1/2 6 1/2
18 160 30 5 3/8 9 7/16 11 3 1/4 1 3 1/8 3 3/4 10 7/8 4 3/8 2 9/16 10 3/4 8 1/2
24 295 52 6 3/8 12 1/2 14 4 3/8 1 1/4 4 1/8 4 3/4 12 1/2 1 5 3/8 3 1/16 14 1/2 10
30 590 65 7 9/16 15 11/16 17 1/4 5 3/4 1 1/2 5 3/8 6 1/4 16 1 7 1/8 3 15/16 19 11
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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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