1344-14M-170 Metric Timing Belt HTD Airtac SC S 70 = Medium series

S 70 = Medium series bearing USO = Standard double row spindle bearing DB with steel balls / fibre cage 55 = 55mm bore A21 = 21 degree contact angle 0 = Tolerance class inner ring: more accurate than P2 or ABEC 9 I = Tolerance class outer ring: more accurate than P4 or ABEC 7 S = Heavy prelaod

The product type is Self-Aligning Ball Bearings 12

4 mm dimensions

on the other hand

1344-14M-170 Metric Timing Belt HTD Airtac SC S 70 = Medium series1344 14M 170 Metric Timing Belt HTD Product Attributes Manufacturer Product Code 1344 14M 170 Basic Product Description Metric Timing Belt HTD Measurement Metric UOM Each Nominal Length Ln (mm) 1344 Tooth Pitch (mm) 14 Width (mm) 170 Weight (Kg) 2. 32 Variance HTD Section 14M Material Rubber Cord Type Fibreglass Temperature range 30'c to +100'c