Oregon M66 chain: what it fits and what the code means
M66 is a .325" pitch, .050" gauge chain with 66 drive links. It fits 93 saws listed below.
What M66 is
- Pitch
- .325"
- Gauge
- .050"
- Drive links
- 66
The letter M is the chain type, the number 66 is the drive link count.
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Check pitch, gauge and drive links on the listing before you order. How this works
Same length, different chain
The number is the length; the letter is the chain. These all have 66 drive links:
| Code | Type | Pitch | Gauge | Family |
|---|---|---|---|---|
| M66 | 95TXL | .325" | .050" | SpeedCut |
| D66 | 72V | 3/8" | .050" | AdvanceCut |
| E66 | 72LPX | 3/8" | .050" | PowerCut |
| H66 | 20BPX | .325" | .050" | ControlCut |
| J66 | 21BPX | .325" | .058" | ControlCut |
H66: same pitch and gauge as M66, different cutter. Either fits the same bar. D66, E66, J66: different pitch or gauge. Not a substitute for M66.
Saws that take M66
Jonsered · 20
Efco · 1
Hitachi · 1
Questions people ask
What does M66 mean on an Oregon chain?
M is the chain series (95TXL, SpeedCut: .325" pitch, .050" gauge). 66 is the number of drive links.
What bar length is M66?
Usually 16". What matters is the drive link count, 66: count the links on your old chain rather than going by the inches.
What file do I need for M66?
A 3/16" round file.