Tip 1: Need a longer stem? Make your own.
Many customers ask about longer ½″ threaded stems for their caster builds. We stock the most popular lengths, but you’re not limited to them.

Ollie’s Tip: On our Model 3, Model 9, and select SS-9 diameters, we offer an option called HK1/2 — the Hollow Kingpin. Instead of a fixed stem, the caster ships with a clean ½″ hole bored straight through the swivel bearing. You supply your own ½″ bolt, slide it through, and you’ve got a stem of exactly the length you need. To install: remove the wheel (simple axle bolt), slip your bolt through the kingpin hole, mount the bracket, reinstall the wheel. Done.

Tip 2: Attaching a caster to end grain wood.
Plate mount casters put the fasteners right on the wood’s edge — not ideal. T-nut solutions aren’t much better; the nut can loosen over time even with epoxy, leaving you with a caster that rocks or pulls free under load.

Ollie’s Tip: Use the HK1/2 option and swap your ½″ bolt for a ½″ × 2½″ lag bolt (as shown in the photos). Drill a pilot hole into the end grain, drive the lag through the kingpin hole, and the caster locks in solidly. This is one of the most secure caster-to-wood installations you can make — far more reliable than any T-nut approach.

Tip 3: Specify a hardened bolt and make the stem virtually unbreakable.
Here’s a benefit most people don’t think about until something breaks: because you choose the bolt, you choose the steel grade.

Ollie’s Tip: Specify a Grade 5 or Grade 8 hardened steel bolt in the HK1/2 and you’ve created a stem that is, in practical terms, stronger than anything we could weld or press onto the caster from the factory. In real-world abuse, the wheel or the legs will fail before that bolt does. This is why we actively encourage the HK1/2 option on high-stress applications — it shifts the failure mode away from the stem entirely.

The HK1/2 is available on the Model 3, Model 9, and select SS-9 diameters. If you’re not sure whether your configuration qualifies, give us a call at 800-501-3808 and we’ll confirm it.

Check out Caster Models with HK1/2 stem option: Stem Caster Model 3 and Total Locking Model 3A