STIHL MS640 — 20" bar

What is the bar length for STIHL MS640 — 20" bar?

For STIHL MS640, bar length is 20"; pitch is 3/8"; gauge is 1.6mm; drive links is 72, verified against its source on 2026-09-02.

MS640, MS650,MS660 | 16" 18" 20" 25" 30" 36" | 3/8" 3/8" 3/8" 3/8" 3/8" 3/8" | 1.6mm 1.6mm 1.6mm 1.6mm 1.6mm 1.6mm | 60 66 72

— lsengineers.co.uk, retrieved 2026-09-02

Verified2026-09-02

Review by2028-09-01

This source states these in separate places, so each value is shown with the passage that states it.

Bar length

20" Bar

Drive links

3621/72

— all from lsengineers.co.uk, retrieved 2026-09-02

lsengineers.co.ukhttps://www.lsengineers.co.uk/advice-centre/stihl-chain-selector

Last verified against source: 2026-09-02. Due for re-check by 2028-09-01. This page as Markdown · OKF bundle · full dataset as JSON.