3M Zahnrad Riemenscheibe 48 -90 Zähne BF-Typ Pulley - für 10mm Breite Zahnriemen

The tooth count determines the pitch circle diameter and, combined with your motor pulley tooth count, sets your drive ratio. For CNC and 3D printer motion systems, matching tooth counts on both ends gives a 1:1 ratio; using different counts creates speed or torque multiplication. Measure your existing pulley or calculate the required pitch circle diameter (PCD = Teeth × Pitch / π) to confirm fit before ordering.

A plain bore is a smooth cylindrical hole — the pulley is typically secured to the shaft with a set screw. A keyed bore includes a machined keyway slot that accepts a standard key (e.g., K3 = 3mm key, K4 = 4mm key). Keyed bores provide positive rotational locking and are preferred for higher-torque applications where set-screw slip is a concern.

No. These pulleys are machined specifically for the 3M tooth profile (3mm pitch, trapezoidal tooth form). GT2 and HTD belts use different tooth geometries and pitches. Mixing profiles causes poor engagement, accelerated wear, and potential belt skipping. Always match pulley and belt by pitch profile.

For typical desktop CNC routers, laser engravers, and 3D printer motion systems operating within the rated load of a 10mm-wide 3M belt, these pulleys are well-suited. The 3M belt system is designed for light-to-medium duty synchronous drives. For heavy industrial loads or high-speed continuous duty, verify the belt's rated tensile strength and confirm the pulley bore fits your shaft diameter with appropriate tolerance.

Measure your motor or drive shaft diameter with a caliper. For plain bores, select the bore that matches your shaft diameter (a light interference or sliding fit is typical). For keyed bores, also confirm the key size on your shaft matches the K designation (K3 = 3×3mm key, K4 = 4×4mm key, K5 = 5×5mm key, K6 = 6×6mm key, K8 = 8×7mm key — verify against your shaft's actual key dimensions).

These pulleys are machined from metal stock, typically aluminum alloy, which provides a good balance of low rotational inertia, dimensional stability, and corrosion resistance for indoor automation environments. If your application requires stainless steel or a specific alloy certification, please contact us to confirm before ordering.

In most cases, yes — provided your existing machine uses a standard 3M BF-type pulley with a 10mm belt. Verify the tooth count, bore diameter, and hub length match your current pulley's dimensions. The BF flange style is a common standard, so these are compatible with most off-the-shelf 3M belt drive assemblies.