STIHL MS 170 Chain: Size Chart & Replacement Chain Loops

Quick answer: pick your bar length below and add the matching STIHL chain loop to your cart. Every loop is genuine STIHL chain cut from the reel and ships nationwide (free shipping on orders $125+).

STIHL MS 170 chain size chart

Chain types for the MS 170

• PICCO Micro Mini 3 (61PMM3): 3/8" P pitch, .043" gauge, low-kickback semi-chisel.
• PICCO Micro 3 (63PM): 3/8" P pitch, .050" gauge, low-kickback semi-chisel; sharpen with a 5/32" (4.0 mm) round file.
• PICCO Super 3 (63PS): 3/8" P pitch, .050" gauge, full chisel, faster cutting; sharpen with a 5/32" (4.0 mm) round file.

Which chain should I buy?

For general firewood and storm cleanup, the semi-chisel loops (RM / PM) are the safest choice: they forgive dirt and are quick to touch up with a file. If you cut clean, seasoned wood and want maximum speed, choose the full-chisel loops (RS / PS). Buying two loops and rotating them is the easiest way to keep the saw cutting while one is being sharpened.

MS 170 chain FAQ

What size chain does a STIHL MS 170 take?

The STIHL MS 170 runs 3/8" P pitch chain. The loop depends on your bar length and gauge: 12" bar = 63PM44/63PS44; 14" bar = 63PM50/63PS50; 16" bar = 63PM55/63PS55; 16" (.043" Mini bar) bar = 61PMM355. Match the drive-link count stamped on your bar.

How do I count drive links?

Lay the chain flat and count the tangs on the inside of the loop, the parts that ride in the bar groove. That number must match exactly; one off and the chain will not tension correctly.

Semi-chisel or full chisel?

Full chisel (RS/PS) cuts fastest in clean wood. Semi-chisel (RM/PM) stays sharp longer in dirty, frozen or storm-damaged wood and is easier to sharpen.

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