Never seemed fair to nail the "lazy" tag so permanently on the "Susans" but that probably has no "bearing" on the issue. Also called turntable bearings, they are the square or circular flat ball bearing devices YOU bolt between two flat objects to achieve rotation. Like that spinning center section of a Chinese restaurant table. We had these in surplus once and they were quite popular. To our chagrin, we discovered they could be bought commercially for the same price. So we did. The 4" version is rated for a 300lb. load and the 12" (round) for 1000lbs.

These light-duty plastic casters are on swiveling stems and have dual 1-1/2" dia x 5/16" wheels in 1-7/8" x 1-3/16" hemispheric housings. Stems are striated steel, 3/8" dia x 3/4" long. We're thinking these would be fine for your average chair. Our each is a bag of (4).

The ball casters are great swivelers and quite snazzy looking, too. Seen on your better chairs everywhere. These are brass plated on 1-1/2" square mounting plates with 3/16" holes at the corners. You pick the 2" or 2-1/2" dia versions.

A nice pulley just ready to be combined into the block and tackle you need for tiny jobs, like trimming your bonsai trees or hauling your model boat out of the pond. Get this block with (1) sheave and rig up whatever you need. Each block has an aluminum frame about 3–1/2” long with “S” hooks on each end. The sheaves, or wheels are about 2” dia x 1/4” wide, with a “V” groove that looks perfect to handle 1/8” or smaller Venetian blind cord. These dudes are perfect for demonstrating mechanical advantage in the physics lab!! But not for heavy lifting.

Pardon us--just a little machinists’ joke. This sturdy cast-iron pillow block measures 5" x 2-3/8" tall x 1-3/8". Has a sealed 1-3/4" dia bearing with a 3/4" ID x 1-7/32" bushing and a pair of set screws. Mounts via 7/16" x 13/16" x 1/2" slots in the base. Has a 1/4” lube fitting with a cover. Get a couple and add a 3/4” dia steel rod, and you’ve got the toughest towel bar in the universe.

Good-bye backaches. Save your sacroiliac with a 3-wheeled professional mover's dolly. It measures 6-3/8" wide between a trio of swivel casters with 1-9/16" x 11/16" wheels, and has a drop-down center and a 1/2" dia hole for permanent attachment to frequently moved items. Steel construction, 110 lb max load (so not piano-duty), and rubber pads above each wheel. Stands 2-1/2" tall. We think ordering (4) would be a good place to start.

No? Good, because we’ve got these plastic gear sets ready for you. You pick. The (20) piece pinion set includes gears from 4mm to 19mm, all meshing, and all with 1.9mm ID bores for 2mm shafts. In 0.5 modulus and very close to 48 pitch. The (7) piece set is 16 pitch with a 20-degree pressure angle, and you’ll get red and blue gears from 3/4” to 2-1/2”, again all meshing. They’re 1/4” thick with a 3/16” bore, and come with a 1-1/2” handle to crank the hub on any gear.

That's what these nylon bushings were made for, but they're suitable for anything that could use a little bushing. Our middle-sized measures 15/16" dia x 15/32" thick with a 3/8" bore and a slight taper.

These little swivel-plate casters look like they should be on the bottom of one of those spinner carry-on suitcases. In flat black, they have (2) 1-1/8" dia x 3/8" plastic wheels (approx 1-1/4" thick) on a 1/4" stem and a 1-1/8” square steel plate with 3/16" mounting holes at the corners. Make a rolling file, or your own  spinner luggage.

These translucent silicone O-rings are 1/8" thick and measure 3-1/2" dia. Nice belts for science-project motors and even nicer for your slingshot needs. Crafters will see jewelry material that the metal-detectors won't care about.

This black plastic gear is 3-1/16" dia with (96) teeth at 32 pitch, 20-degree pressure angle. Center has a 9/16" ID bore with a 3/4" dia x 1/8" bushing on both sides. One side also has (3) 3/32" ID x 1/8" standoffs along with a 3/16" tooth along one edge. Source and function are unknown but you'll think of something.

You pick from our nylon gear collection. The 30-tooth gear is 1" dia, 32 pitch, with a 20-degree pressure angle. Measures 3/32" thick on the face with a 3/32" bore on that side and an 11/32" dia x 3/8" long 9-tooth shaft with the same pitch/pressure. The 32-tooth gear is 1-1/16" dia, 32 pitch and 20-degree pressure angle (so it'll mesh with the 30-tooth). Measures 3/32" thick on its face with a 1/4" bore and a 15/32" dia x  17/32" long 13-tooth shaft with the same pitch/pressure.

These translucent silicone O-rings are 3/32" thick and measure 4" dia. Nice belts for science-project motors and even nicer for our slingshot needs. Crafters will see jewelry material that the metal-detectors won't care about.

These pillow block bearings have 13-gauge steel mounting straps, 4" long x 1-1/8" with 5/16" x 5/8" mounting slots, and a sintered iron ball unit measuring 1-11/16" dia with either a 5/8” ID or 1” ID brass sleeve. The 5/8” ID one has an oil cup on the top; the 1” dia version has a grease fitting in the same place.

Little black plastic gear, 1-1/32" dia x 3/32" thick with (34) teeth, 32-pitch with a 14-1/2 degree pressure angle and a 3/8" long, 11/32" 9-tooth shaft, same pitch, with the teeth on the outer half. Has (3) equidistant 3/16" bores in the face, and a 5/32" bore on the shaft side, 3/32" on the face side.

Nice multipurpose wheel measures 4-7/8" dia x 1-1/4" with a gray plastic wheel and a hard rubber tire with straight-line treads. The 7/8” dia hub is flush on one side, and protrudes 3/8" long on the other (inside) with a 3/8” bore all the way through.

Bring these bearings to bear on your next project. Our supply and variety is constantly rolling over so get ‘em while we got ‘em!. Click on the bearing name to see a large photo of your favorite. 

This small 24-tooth pulley is 1-1/16" long with 5/16" of that being a 5/8" dia shaft with a 1/2" x 3/8" flattened bore. The pulley portion is 1" OD x 7/8" ID. In shiny silver aluminum.