What's Actually in a Lazy Susan Hardware Kit
Typical kit contents
The Two Plates, Explained
A lazy susan bearing is two concentric steel plates that rotate independently.
Understanding which plate does what prevents the single most common installation error: mounting both plates to the same fixed surface.
Screw Specifications and Load Ratings by Bearing Size
The table below covers everything you need before drilling a single hole: load capacity, pilot hole size, screw number, and whether a detent stop is available.
Screw length is not fixed — it depends on your material thickness.
The rule: at least 2/3 the depth of the board, without penetrating through the opposite face.
Always do a one-screw test assembly before committing to all holes.
Bearing | Load Capacity | Pilot Hole | Screw | Countersink? | Detent |
|---|---|---|---|---|---|
3" | 200 lbs | 5/32" | #6 | If flat-head | No |
4" | 300 lbs | 5/32" | #6 | If flat-head | No |
6" | 500 lbs | 5/32" | #6 | If flat-head | No |
9" | 750 lbs | 3/16" | #8 | If flat-head | Yes (1 or 8) |
12" | 1,000 lbs | 3/16" | #8 | If flat-head | Yes (4) |
For #10 flat head screws: countersink each hole so the screw head sits flush. A protruding screw head will contact the bottom plate during rotation — the bearing will bind or scratch on every turn.
Tools You'll Actually Need
Step-by-Step Installation
For 3", 4", and 6" Bearings
Before drilling anything, find the center. Mark the center point on the tray and on the base, then line up the bearing's center hole over each mark. Spin the bearing by hand — it should turn freely before a single screw goes in.
For 9" and 12" Bearings
The larger access holes on 9" and 12" bearings change the installation sequence — you mount the bearing to the base first, then attach the turntable through the access holes.
Using Speed Nuts (The Better Option for Top Plate Attachment)
Speed nuts — small, spring-steel clip nuts — are an underused installation trick.
Instead of countersinking flat-head screws into the turntable, you press speed nuts onto #10 flat-head screws from above, insert them through the top plate holes, and the spring tension holds them in place during installation.
Two advantages over countersunk flat-head screws
1. Easier disassembly if you ever need to replace the bearing.
2. No countersinking required on the turntable surface.
Speed nuts are rarely included in standard lazy susan hardware kits. Buy them separately at any hardware store — they're inexpensive and worth having on hand.
The Most Common Installation Mistakes
3" = 200 lbs max. 9" = 750 lbs max. 12" = 1,000 lbs max.
Overloading deforms ball races.
Always add a 25–30% safety margin to your estimated load.
Five More Mistakes That Cause Problems
Mounting off-center: if the bearing isn't centered on both the tray and the base, the load sits unevenly and the tray wobbles as it spins. Mark and check center points on both plates before drilling.
Debris in the ball race: sawdust, paint, or grit that gets into the race during installation makes the bearing rough or noisy. Wipe the race clean immediately before final assembly.
Overtightening the screws: driving screws in too hard can deform the thin steel bearing plates, causing the same binding or uneven rotation as a screw that's too long. Snug is enough — you don't need full drill torque.
Mounting the bearing upside down: the small pilot holes and the large access holes sit on different plates. Even on bearings where either face can technically point up, flipping the intended orientation puts the wrong hole pattern where you need it, making the second plate harder to reach and drill.
Mounting on an uneven surface: a warped board or an uneven cabinet shelf tilts the whole assembly, so the bearing binds on one side even if every screw is correct. Check the mounting surface is flat before drilling.
Heavy-Duty and High-Load Installations
For large trays, cabinets, or anything carrying significant weight, the standard kit specs above aren't always enough on their own. A few adjustments make the assembly more durable:
Use thicker mounting plates so screws bite into more material.
Add more fasteners than the kit's minimum recommendation.
Step up to a bearing with a higher load rating rather than pushing a smaller bearing to its limit.
Factor in the operating environment, not just the platform diameter — outdoor, washdown, or high-humidity settings call for a bearing finish that resists corrosion, not just one rated for the weight.
Confirm the mounting surface itself is stiff enough — a bearing rated for 750 lbs won't perform if the base flexes under load.
The load path through any lazy susan assembly follows the same order, regardless of size: rotating tray → top bearing plate → ball bearing race → bottom bearing plate → fixed base. A simple DIY build sandwiches the bearing between two flat discs, but cabinet lazy susans are different — the bottom plate mounts directly to the cabinet's shelf supports or structure instead of a separate base disc, so measure against the actual shelf before ordering hardware.
For higher-load or commercial builds, browse our full lazy susan bearing range to compare load ratings and sizes before finalizing a kit.
If your load exceeds that range entirely, our Heavy Duty Turntable Bearings guide covers thrust and slewing options rated up to 25,000 lbs.
When to Buy a Kit vs. Components Separately
Kits make sense for single-project, standard-size installations (3"–12" steel bearings) where the included screws match your material.
They're cost-effective and convenient.
Buy components separately when:
You're installing multiple bearings and need bulk screws
Your material thickness requires non-standard screw lengths
You need speed nuts (almost never included in kits)
You're specifying precision aluminum bearings (ASL series) — these are generally sold as individual bearing units without a kit, and screw patterns follow metric bolt-circle dimensions
For guidance on selecting the right bearing size and load rating before buying a kit, see our lazy susan hardware selection guide.
Frequently Asked Questions
How to install lazy susan hardware?
Find the center of both the tray and the base, attach the bottom plate to the fixed base with the correct screws for your bearing size, then rotate the bearing so the top plate's holes are accessible and fasten it to the rotating tray. Spin it by hand to test before final use. The exact steps differ slightly by bearing size — see the step-by-step installation section above for 3"–6" bearings and 9"–12" bearings separately.
What size screws come in a standard lazy susan hardware kit?
Most kits include #6 wood screws for 3"–6" bearings and #8 screws for 9"–12" bearings. Always verify the screw length against your material thickness before installation — the included screws may not match your specific application.
Can I install a lazy susan bearing without a drill?
Not recommended. Without pilot holes, screws are likely to split wood or strip before seating. A basic cordless drill with a 5/32" bit is the minimum required tool for a reliable installation.
Why does my lazy susan click or bind after installation?
The most likely cause is a screw head sitting above the plate surface, contacting the opposing plate during rotation. Check every screw — even one that's 0.5mm proud can cause the symptom. The second most common cause is debris caught in the ball race; remove the bearing, clean the race, and reinstall.
Do I need to lubricate the bearing before installing?
For greased bearings (marked "CG"), no — they arrive pre-lubricated. For ungreased bearings in high-use applications (restaurant tables, retail displays), applying a small amount of bearing grease before final assembly extends service life and reduces noise. Don't overdo it: excess grease squeezed out of the race attracts sawdust and grit, which causes the exact roughness you're trying to prevent.
How do I know if my lazy susan hardware kit includes the right bearing for my load?
Check the load capacity on the product spec sheet. 3-inch bearings handle up to 200 lbs; 12-inch bearings handle up to 1,000 lbs. Add a 25–30% safety margin to your estimated load before selecting. If your kit doesn't specify a load rating, that's a red flag — buy from a supplier that publishes full specifications.
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