Oregon M78 chain: what it fits and what the code means
M78 is a .325" pitch, .050" gauge chain with 78 drive links. It fits 78 saws listed below.
What M78 is
- Pitch
- .325"
- Gauge
- .050"
- Drive links
- 78
The letter M is the chain type, the number 78 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 78 drive links:
| Code | Type | Pitch | Gauge | Family |
|---|---|---|---|---|
| M78 | 95TXL | .325" | .050" | SpeedCut |
| H78 | 20BPX | .325" | .050" | ControlCut |
| J78 | 21BPX | .325" | .058" | ControlCut |
H78: same pitch and gauge as M78, different cutter. Either fits the same bar. J78: different pitch or gauge. Not a substitute for M78.
Saws that take M78
Jonsered · 13
Questions people ask
What does M78 mean on an Oregon chain?
M is the chain series (95TXL, SpeedCut: .325" pitch, .050" gauge). 78 is the number of drive links.
What bar length is M78?
Usually 20". What matters is the drive link count, 78: count the links on your old chain rather than going by the inches.
What file do I need for M78?
A 3/16" round file.