Low Speed Shaft Overhung Load

What determines these ratings?

Overhung load is a function of the shaft bending strength, the radial capacity of the bearing, the gearcase strength  and the position of the sprocket or sheave on the shaft (bearing centerline to sprocket/sheave centerline).  Where capacities increase as RPM's decrease, the bearing is limiting.  Where capacities are constant, other factors are limiting.

Basis for calculations

These guides are based on 1800rpm input speed.  The load is to be applied one shaft diameter from the housing face, and applies to single shaft extension units only.  The guide is for pure radial loads only.  In the event of combination radial and thrust loads, or for double extended low speed shafts, or for input speeds other than 1800rpm, or for higher load requirements, consult Cleveland Gear.

Ball Bearing Type

Guide to Low Speed Shaft Overhung Load in Inch Pounds

Ratio Unit Size
34 45 50 60 70 80 100* 120 135
10 145 289 380 400 550 810 630 760 1330
15 145 289 440 470 650 960 770 930 1580
20 145 289 440 560 760 1130 910 1160 1860
25 145 289 440 620 870 1250 1030 1260 2110
30 145 289 440 610 850 1240 1010 1220 2040
40 145 289 440 720 1000 1460 1200 1530 2470
50 145 289 440 810 1140 1630 1380 1730 2840
60 145 289 440 810 1230 1790 1520 1940 3160

This guide applies to all single reduction models using ball bearings to support the low speed shaft assembly.

* Size 100 is lower than size 80 due to the distance from the bearing center to the center of the usable shaft.

 

Taper Roller Bearing Type

Guide to Low Speed Shaft Overhung Load in Inch Pounds

Ratio Unit Size
50 60 70 80 100* 120 135 155 175 200 225
10 440 810 820 1790 1520 1140 2000 6310 7550 8710 9670
15 440 810 980 1790 1520 1400 2370 6310 7550 8710 9670
20 440 810 1440 1790 1520 1740 2790 6310 7550 8710 9670
30 440 810 1280 1790 1520 1830 3060 6310 7550 8710 9670
40 440 810 1280 1790 1520 2300 3710 6310 7550 8710 9670
50 440 810 1280 1790 1520 2600 4150 6310 7550 8710 9670
60 440 810 1280 1790 1520 2610 4150 6310 7550 8710 9670

This guide applies to all single reduction models using taper roller bearings to support the low speed shaft assembly.  Taper roller bearings are not standard on units from size 50 to size 135.  Consult our price list for bearing modification costs.

* Size 100 is lower than size 80 due to the distance from the bearing center to the center of the usable shaft.
1-800-423-3169
Cleveland Gear Company
3249 East 80th Street
Cleveland, Ohio 44104
sales@clevelandgear.com