Technical guides
Short explanations to help you choose the right part: codes, sizes and types.
Bearings
How to read a bearing code
What the digits and letters in a code like 6205-2RS C3 mean: type, size series, bore, seal and clearance, with short examples.
2RS vs ZZ: bearing seals and shields
ZZ is a metal shield, 2RS a rubber seal. Differences in dust, water, speed and friction, open bearings, and seal codes by brand.
What does C3 mean? Bearing internal clearance
C3 means the internal clearance is greater than normal. The difference between C2, normal, C3 and C4, and when to choose C3.
How to measure a bearing
How to measure the bore, outer diameter and width of a bearing with a caliper, common mistakes, and finding a bearing from its size.
Belt
How to read belt codes
How to read the profile, length and width in belt codes such as B62, SPZ 1250, 6PK1450 and 8M-920 30, by belt type.
What is a Ribbed Belt and How to Select It?
Working principle of ribbed (Poly-V) belts, PH, PJ, PK, PL, PM profile types, and basic measurement steps for proper belt selection.