Course Reserves: Bearings

We have additional components in course reserves which are not part of the usual lab stock. These are available on request subject to availability.

For a searchable index of all regular lab parts, please see Physical Computing Lab Inventory.

Thin-Section Bearings

Thin-section bearings are ball bearings with an especially large bore. They are useful for keeping the center of a rotation axis open, e.g. for sensors or wiring. They can sometimes be used as a solitary bearing, i.e., they are wide enough to support off-axis loads in some applications without requiring a pair of bearings.

These metric bearings follow a standard size numbering scheme. E.g., a 6707 size has a 35 mm inner diameter, 44 mm outer diameter, and 5 mm width. Here is a handy table of standard sizes: https://www.bearingworks.com/bearing-sizes/

Thin-Section Bearings

Size	Lab Part #	Description
6707-2RS	proposed	35x44x5 mm Ball Bearing, Double Rubber Seals
6810-2RS	reserve-only	50x65x7 mm Ball Bearing, Double Rubber Seals
6810ZZ	non-stock	50x65x7 mm Ball Bearing, Double Shield

Lazy-Susan Bearings

Lazy-Susan Bearings are low-precision large-diameter bearings typically used for turntables. They are mounted using screws rather than bearing seats.

Lazy-Susan Bearings

Size	Lab Part #	Description
3 inch square	Lab Part 1891	turntable bearing, 3 inch square, 0.31 in height, 1.31 in inner diameter, 200 lbs. capacity, McMaster-Carr Part 6031K16
200 mm round	non-stock	200 mm Lazy Susan Aluminum Bearing, VXB Kit12879
250 mm round	reserve-only	250 mm Lazy Susan Bearing, 9mm width, 250lb capacity, SilverThin ASL250-090
392 mm round	non-stock	392 mm Lazy Susan Aluminum Bearing, VXB Kit11281
12.8 inch round	non-stock	Round Turntable, 175 lb capacity, McMaster-Carr Part 18635A52