General-purpose and high-power compact stirrers cover the majority of laboratory stirring applications. This article compares the BL and BLh Three-One Motor series and explains their selection points.

Friction and wear testing machines can be classified by their motion method. This article introduces 8 major motion types—reciprocating, rotary, pin-on-disk, and more—with representative HEIDON products.

The fixture (jig) used in a friction and wear tester determines the contact geometry, motion type, and measurable parameters. This article introduces key fixture types and their applications.