MB55X1/2, BK57-1/2, Transmission Pulley; 1/2" Bore; 1 Groove; 5.45" Outside Diameter; Finished Bore; 4L | A | 5L | B Belt Series; 4.7" Pitch Minimum; 5.1" Pitch Maximum; Keyway

MB55X1/2, BK57-1/2,  Transmission Pulley; 1/2" Bore; 1 Groove; 5.45" Outside Diameter; Finished Bore; 4L | A | 5L | B Belt Series; 4.7" Pitch Minimum; 5.1" Pitch Maximum; Keyway

KEY FEATURES

• Model: MB55X1/2

• Noun: Pulley (Transmission Sheave)

• Category: Sheaves – Fixed Pitch

• Belt Series: 4L | A | 5L | B

• Number of Grooves: 1

• Mounting Method: Finished Bore

• Bore Size: 1/2'' (12.7 mm)

• Outside Diameter: 5.45'' (138.43 mm)

• Pitch Diameters: ~5.05'' (A/4L) | ~5.45'' (B/5L)

• Belt Width Range: 0.5'' – 0.656'' (12.7 – 16.662 mm)

• Keyway: Yes

• Bushing Size: No Bushing (Fixed Bore)

• Construction: Light-duty Cast Iron

• Weight: ~2.6 lbs (~1.18 kg)

• Units: Inch / Metric

• Application: Power transmission

• Groove Profile: Compatible with 4L, A, 5L, and B belts