MXL 14T-32T Timing Belt Pulley Pitch 2.032mm K-Type CNC Drive Pulleys Width 11mm

The tooth count determines your drive ratio. Divide the driven pulley's tooth count by the driving pulley's tooth count to get the ratio. For example, a 14T driver paired with a 28T driven pulley gives a 2:1 reduction. For CNC motion axes where you want 1:1 direct drive, match the tooth count on both ends. For torque multiplication, use a smaller driver and larger driven pulley.

Common NEMA 17 stepper motors use a 5 mm shaft; NEMA 23 motors typically use an 8 mm shaft. For servo motors or DC motors, check the motor datasheet for the shaft diameter. The 3.175 mm bore fits ⅛ in shafts, and the 6.35 mm bore fits ¼ in shafts — useful for imperial-standard motors. Always measure your shaft with calipers before ordering.

The K-type keyway is a rectangular slot machined into the bore wall. When a matching key (a small rectangular metal bar) is inserted between the shaft keyway and the pulley keyway, it prevents the pulley from rotating independently of the shaft. This is essential for applications with reversing loads or high torque. You will need a standard metric or imperial key that matches your shaft's keyway dimensions — these are widely available at hardware and industrial suppliers.

Yes. The MXL tooth profile is an industry-standard specification (2.032 mm pitch, 40° tooth angle). These pulleys are compatible with any MXL-profile timing belt of 11 mm width, regardless of brand. Confirm the belt width matches — using a narrower or wider belt will reduce engagement and may cause tracking issues.

Aluminum alloy naturally forms a thin oxide layer that provides moderate corrosion resistance. For humid indoor environments (such as workshops near water), the bare aluminum finish is typically sufficient. For outdoor or marine-adjacent applications, consider applying a light coat of dry-film lubricant or corrosion inhibitor to the bore and keyway area. Avoid prolonged contact with salt water or strong acids.

Yes. MXL pulleys are commonly used in desktop 3D printers (particularly older or custom designs) and small laser cutters that use MXL belt drives. Verify that your machine's belt is MXL profile and 11 mm wide, and that the bore matches your motor shaft. Many modern printers use GT2 belts — MXL and GT2 are not interchangeable, so confirm your belt profile before ordering.

MXL (2.032 mm pitch) and GT2 (2 mm pitch) are two different tooth profiles and are not interchangeable. GT2 has a curvilinear tooth profile designed for lower backlash, while MXL uses a trapezoidal profile. If your belt is labeled GT2 or 2GT, you need GT2 pulleys. If your belt is labeled MXL or 0.080 in pitch, these pulleys are the correct match.