Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your sliding door skips the track, your CNC carriage wobbles, or your automation guide rail wears unevenly, the culprit is almost always a pulley wheel that wasn't designed for the job. Makers, fabricators, and maintenance engineers who need a reliable, low-noise rolling solution will find these groove nylon pulley wheels purpose-built for precision linear guidance.
Each wheel is machined from engineering-grade nylon with a pre-installed deep-groove ball bearing at its core. Available in three groove profiles — U-Type, V-Type, and H-Type — and five slot widths (10 mm, 16 mm, 20 mm, 22 mm, 30 mm). Outer diameters range from 40 mm (approx. 1.57 in) to 68 mm (approx. 2.68 in); inner bore diameters from 8 mm to 15 mm; wheel thickness from 18 mm to 36 mm.
Typical use cases include sliding barn door hardware, aluminum extrusion linear rail systems (e.g., 2020/3030 profile), CNC router gantry carriages, drawer glide mechanisms, and light-duty conveyor guide wheels. The nylon construction keeps rolling noise low while the embedded bearing handles radial loads cleanly — a combination sought in DIY sliding door pulley wheel replacements and CNC guide rail pulley upgrades alike.
Three Groove Profiles in One Listing — U-Type for round rods, V-Type for angled rails, and H-Type for flat-flanged tracks. Select the profile that matches your guide rail geometry to ensure full contact and stable tracking.
Pre-Installed Deep-Groove Ball Bearing — The bearing is embedded at the factory, not press-fit in the field. This ensures concentricity between bore and wheel OD, reducing wobble and extending service life under continuous cycling loads.
Engineering-Grade Nylon Wheel Body — Nylon runs quieter than metal-on-metal contact and resists light oils, dust, and moderate moisture. Suitable for indoor workshop environments, residential sliding door hardware, and light industrial automation frames.
Wide Size Range — 40 mm to 68 mm OD — Five OD/bore/thickness combinations and five slot widths give you the flexibility to match existing hardware or design a new carriage from scratch without custom machining.
Available in 1, 2, or 5-Piece Packs — Order a single wheel for a repair, a pair for a two-wheel carriage, or a five-pack for a full door set or batch build. Quantity pricing is reflected in the variant selector.
Drop-In Replacement Geometry — Standard bore diameters (8 mm and 15 mm) align with common M8 and M15 axle bolts used in off-the-shelf sliding door kits and aluminum extrusion carriage hardware, simplifying replacement without re-drilling.
| Groove Types | U-Type, V-Type, H-Type |
|---|---|
| Slot Width Options | 10 mm, 16 mm, 20 mm, 22 mm, 30 mm |
| Outer Diameter (OD) Range | 40 mm – 68 mm (approx. 1.57 in – 2.68 in) |
| Inner Bore Diameter Range | 8 mm – 15 mm |
| Wheel Thickness Range | 18 mm – 36 mm |
| Bearing Type | Deep-groove ball bearing (pre-installed) |
| Wheel Material | Engineering-grade nylon |
| Available Pack Quantities | 1 PCS, 2 PCS, 5 PCS |
| Size & Amount | See variant options |
Match the groove profile to your rail cross-section. U-Type is designed for round rods or cylindrical rails. V-Type seats on angled or triangular rail edges, common in linear guide systems. H-Type engages flat-flanged or T-slot style tracks. If you are unsure, measure the rail profile width and compare it to the slot width options available.
The slot width should match or be slightly wider than the rail edge or flange that the wheel rides on. Available slot widths are 10 mm, 16 mm, 20 mm, 22 mm, and 30 mm. For standard 2020 aluminum extrusion T-slot rails, a 10 mm or 16 mm slot width is typically appropriate. For heavier 3030 or 4040 profiles, consider 20 mm or 22 mm.
The bore diameter must match your axle. Bore diameters in this range are 8 mm (for the 40 mm OD wheel) and 15 mm (for the 54 mm, 63 mm, and 68 mm OD wheels). Verify your axle diameter before ordering. Standard M8 and M15 bolts are compatible with the respective bore sizes.
These wheels are suited for light-to-medium duty applications such as residential sliding doors, DIY CNC carriages, and light automation frames. The load capacity depends on the bearing specification and wheel size. For heavy industrial loads exceeding the bearing's rated radial load, please contact us to confirm suitability before ordering.
The nylon wheel body resists moisture and light corrosion well. However, the embedded steel ball bearing may be susceptible to rust in prolonged wet or outdoor exposure without additional sealing or lubrication. For outdoor applications, periodic lubrication of the bearing is recommended. For fully weatherproof requirements, contact us to confirm bearing seal type.
Yes. A typical two-wheel sliding door carriage uses one wheel on each side of the rail. Ordering the 2 PCS pack provides a matched pair from the same production batch, which helps ensure consistent rolling resistance and wear characteristics across both wheels.
The pack quantity determines how many individual pulley wheels you receive. 1 PCS is ideal for a single replacement. 2 PCS suits a standard two-wheel carriage. 5 PCS is cost-effective for a full door set (typically 4 wheels) or a small batch build project. All packs contain the same wheel type and size as selected in the other variant options.
