Engineering guides

Practical reference notes for identifying and enquiring about industrial parts.

Seal materials compared: PU, NBR, FKM, EPDM, silicone, PTFE and POMCompare seven common seal materials by strengths, fluid compatibility, limitations and typical uses, with practical steps for choosing a compound.

How to measure a hydraulic seal for replacementMeasure a hydraulic rod, piston, wiper, O-ring or oil seal correctly using groove dimensions, a clean sample and clear application details.

How to read a bearing numberUnderstand basic ISO bearing designation digits, bore codes and common suffixes such as 2RS, ZZ and C3, with a worked 6205-2RS example.