nhbb :: precision engineering

torque

Starting torque and running torque are extremely important in applications such as gyro gimbals, low power consumption motors, and precision positioning devices. In such applications, the total system should be evaluated in the design phase for torque input vs. torque reflected by the various driven components. In many cases, bearing design and manufacture can be modified to reduce torque.

Maximum Starting Torque Values For ABEC 7P Bearings

NHBB Basic Size	Test Load (Thrust) grams	Maximum Starting Torque milligram—millimeters
		RADIAL PLAY
		Tight fit .0001" - .0003"	Normal fit .0002" - .0005"	Loose fit .0005" - .0008"
SSRI-2 SSRI-2 1/2 SSRI-3 SSRI-4 SSRI-5	75 75 75 75 75	1,800 1,800 1,800 1,800 1,800	1,500 1,500 1,500 1,500 1,500	1,400 1,400 1,400 1,400 1,400
SSRI-418 SSRI-518 SSRI-618 SSR-2 SSRI-618	75 75 75 75 400	1,800 1,800 2,000 2,000 5,000	1,500 1,500 1,600 1,600 4,500	1,400 1,400 1,500 1,500 4,200
SSR-2 SSR-2A SSRI-5532 SSRI-5632 SSRI-6632	400 400 75 75 75	5,000 5,000 1,800 1,800 2,000	4,500 4,500 1,500 1,500 1,600	4,200 4,200 1,400 1,400 1,500
SSR-3 SSRI-614 SSRI-814 SSR-4 SSRI-1214 SSRI-1438	400 75 400 400 400 400	6,500 1,800 6,000 7,000 8,000 11,000	5,500 1,500 5,200 6,000 7,000 9,500	5,000 1,400 4,800 5,500 6,500 9,000