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.

Our 4" dia swivel-stem casters have 3/4" wide dual black-plastic wheels and 1" steel stems with 1/2" - 13 threads. Available with or without a foot-operated lock No weight limit listed, but they're pretty sturdy, and pretty snazzy, at least to the extent that casters admit of snazziness.

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

Or gear down-for the science fair or for any number of hobby projects. This hard-to-find set of (3) combination spur/beveled gears-for when you want gears set either straight or at 90° to one another-also has one small spur gear, plus three bushings. All in red, green, or blue plastic (we'll pick). The combo-beveled gears are 1-5/8", 1-1/4" and 27/32" dia with 3/16" bores to accept the bushings, which are 3/16" OD, 3/32" ID. The straight gear is 17/32" dia with a 1/16" half-bore. All are 24 pitch.

This set of (4) stylish gray plastic casters includes (2) fixed and (2) swivelers. All have double 1-1/2" dia x 1/4" wheels set on an axle and are 1-3/16" wide overall. Fixed caster plates are 2-7/8" x 1-5/8" with 3/16" mounting holes on the corners and a tooth on the long side; swivel plates are1-5/8" sq with 3/16" mounting holes.

You pick: the sleeved bearing, sometimes listed as a "special agricultural bearing," is a single race radial bearing, 1-9/16" OD x 5/8" ID x 3/4" with a black plastic sleeve surrounding it, measuring 1-13/16" x 1" with a 1/16" wall; the booted bearing measures 1-1/2" OD x just shy of 11/16" ID x 1/2" thick, inside a 1-13/16" black rubber boot with a removable hex ID bushing.

Our each is (10) feet of  #420 roller chain with a 1/2" pitch at 1/4" wide. Pre-stretched and heat-treated, and includes a master link. Rated for a 3600-lb load. This size is used with a lot of minibike and go-kart drives.

Interesting concentric sealed bearing, like a pillow block, from Hub City. The outer portion measures 52mm dia x 15mm thick with an anti-rotation pin, and the inner measures  34mm dia x 12mm thick with a 22mm ID bore and (2) 3mm setscrews.

If these were full-size, car guys would put them on restored ’57 Bel Airs and low riders. These 6” dia solid rubber wheels are gray with (5) treads on 1-7/8” wide tires. Mounted on a 4” dia aluminum rim with dual 9/16” ID bearings with a loose bushing between them. One side has a nearly 1-3/4” dia hub that protrudes approx 3/16”; the other bearing is recessed by 3/8”.

For your riding comfort, this 9-5/8" dia x 3" wide pneumatic tire has a plastic hub, rubber treads and a 25psi inner tube. Has a 1/2” ID with a 1-1/4” dia x 15/16” axle hub on the inside face and a standard Schrader air valve on the outer. Great for DIY large wagons, or to replace those little hand truck tires.

Biggest industrial bearing we’ve seen in a dog’s age, and we’ve got some old industrial dogs around here. This shielded, single-direction roller thrust bearing is 80mm OD x 30mm ID x 36mm thick. Unique bore. Will fit either 30mm square or 31mm round shaft. Part #208PP5.

Steel. Not used but a little rusty from storage. Handy. Measures 3-1/2" dia with a single 1/2” ID sheave with a 2-1/8" x 1-5/8" dia hub and a keyed 1” ID bore. Drilled for a 1/4” - 16 setscrew (not included). Made in the USA.

Well, who doesn’t, really? And yet most of us confine our swiveling to our local dive. Until now, when you can buy genuine authentic bar-stool swivel plates and make home swiveling a reality. In heavy-duty steel, double 7” square plates are separated by a plethora of steel ball bearings, and have 1/4” mounting holes on the corners. Might be a touch stiff at first, but a little break-in swiveling and a drop of oil or dab of grease will fix that. Please note: These are designed to be stiff not swivel freely. To test, add oil or grease, stand on and twist and shout like the Beatles. 

This nostalgia-prompting, zinc-plated aluminum single sheave pulley is made (and so marked) for a clothesline, which is what people dried clothes on before there were driers. If you had two of these, you could run a clothesline to the kitchen window of the tenement across the street and have something to tell your grandkids about. Measures 3-1/2" dia x 1/2" ID on a 3/4" wide x 2-1/2" bracket and comes with a 4" long x 7/8" ID J-hook for mounting outside the kitchen window.