HTD-5M 46-60Teeth Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 16mm

The tooth count determines the pitch diameter and, combined with your mating pulley, sets the drive ratio. A 46 T pulley paired with a 23 T motor pulley gives a 2:1 reduction. Higher tooth counts (e.g., 60 T) also increase the belt wrap angle on the driven pulley, which improves load capacity. Select based on your required speed ratio and available center distance.

Most NEMA 17 stepper motors use a 5 mm shaft; NEMA 23 motors typically use an 8 mm or 6.35 mm (1/4") shaft; NEMA 34 motors commonly use a 12 mm or 14 mm shaft. Measure your shaft diameter with calipers before selecting a variant. The expansion sleeve accommodates minor shaft tolerance variation, but the bore must match the nominal shaft size.

The expansion sleeve distributes clamping force circumferentially, which is more effective than a single set screw. For typical CNC and robotics loads the connection is sufficient. For very high-torque applications (e.g., heavy industrial conveyors), verify the clamping torque rating against your drive requirements. Ensure clamping screws are torqued to specification and use thread-locking compound if vibration is present.

Yes. The HTD-5M tooth profile is an industry-standard geometry defined by the HTD (High Torque Drive) specification. Any HTD-5M belt — regardless of brand — with a 15–16 mm width will mesh correctly with these pulleys. Avoid mixing HTD-5M pulleys with MXL, GT2, or T5 belts, as those profiles are not interchangeable.

Aluminum alloy forms a natural oxide layer that provides moderate corrosion resistance in typical indoor and light-outdoor environments. For prolonged exposure to moisture, salt spray, or aggressive chemicals, consider applying a thin coat of corrosion-inhibiting lubricant to the pulley surface and clamping screws. Stainless steel clamping screws (if not already supplied) further improve corrosion resistance.

Yes. These pulleys function identically as driver or driven pulleys. The expansion sleeve design makes them especially convenient on the driven side where shaft access may be limited, since no keyway or press fit is required. Just ensure both pulleys are aligned in the same plane to prevent belt tracking issues.

The pitch diameter scales linearly with tooth count: 46 T ≈ 73.2 mm, 48 T ≈ 76.4 mm, 50 T ≈ 79.6 mm, and 60 T ≈ 95.5 mm. The outer diameter is slightly larger than the pitch diameter. The 60 T pulley is noticeably larger and heavier, which may affect rotational inertia in high-acceleration servo systems. All four share the same 16 mm width and the same sleeve bore range.