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Author Topic: Ripping Chain Speed  (Read 1021 times)

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Offline Believer

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Ripping Chain Speed
« on: February 26, 2016, 07:51:33 AM »
Hello, I'm planning to build a slabber and am working through the design.  I have a 2800 rpm 14hp diesel I plan to use on a 5 or 6 foot bar.  What speed should I run the chain?  If it makes any difference, I'm also putting a right angle gearbox between the motor shaft and the chain drive sprocket. 

Offline boscojmb

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Re: Ripping Chain Speed
« Reply #1 on: February 26, 2016, 04:15:20 PM »
Here is the chain saw mill that I had.
It's not exactly a dedicated slabber, but similar in concept.
Chain speed under a load was about 2150 FPM.

You can buy sprockets ranging from 7 to 14? teeth. I would start with  a sprocket somewhere in the middle so you can increase or decrease your chain speed without redesigning your whole rig.

John B.

Log-Master LM4

Offline terrifictimbersllc

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Re: Ripping Chain Speed
« Reply #2 on: February 26, 2016, 04:20:51 PM »
That little guy's face tells everything you need to know about chainsaw milling.  :D
DJ Hoover, Terrific Timbers LLC,  Mystic CT  2001 WM LT40SHDD (42HP Kubota, Accuset2, FAO's, Lubemizer, debarker), Peterson WPF 10-30 with chain slabber. Logrite fetching arch, WM BMS250 sharpener/BMT250 setter.  2001 F350 7.3L PSD 6 spd manual ZF 4x4 Crew Cab Long Bed

Offline mad murdock

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Re: Ripping Chain Speed
« Reply #3 on: February 26, 2016, 04:28:51 PM »
That is a pic of a Bumblebee sawmill. I have one of those. As far as a CSM goes, it does work pretty well. Operator fatigue is at a minimum.
JD AMT 626, Turbosawmill M6 Warrior Ultra liteweight, Granberg Alaskan III, lots of saws-gas powered and human powered :D

Offline scsmith42

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Re: Ripping Chain Speed
« Reply #4 on: February 27, 2016, 11:18:39 PM »
As I recall the Lucas and Peterson dedicated slabbers run at around 3000 fps.  When I built my slabber I started off at 7500 fps, and ended up slowing it down to around 4000 because the chain's would stretch and break at the higher speeds.
Peterson 10" WPF with 65' of track
Smith - Gallagher dedicated slabber
Tom's 3638D Baker band mill
and a mix of log handling heavy equipment.

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