Library › Hardware › Small pistons Ø14.9 × 15 and Ø19.9 × 20

gas-spring piston Ø15 (= the Ø15 bounce-space bore; clearance-seal running fit) × 15, Ø5 rod bore

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

file	gas-spring-piston-15x15
diameter	14.9
length	15
bore it runs in	15
rod bore	5
k at 1 bar, 20 cm³	≈ 220 N/m

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From the full sheet

Small pistons Ø14.9 × 15 and Ø19.9 × 20: every size, notes, mating features and sources. What small piston fits a 15 or 20 mm bore?

Other sizes

gas-spring piston Ø20 (= the Ø20 bounce-space bore; clearance-seal running fit) × 20, Ø5 rod bore