Use and Care Guide
56V LITHIUM-ION CORDLESS CHAIN SAW — CS1800/CS1800-FC34
Underbucking
Begin on the underside of the log with the 
top of the saw against the log; exert light 
pressure upward. During underbucking, 
the saw will tend to push back at you. Be 
prepared for this reaction and hold the 
saw rmly to maintain control.
 ◾
When the log is supported along its 
entire length, it should be cut from 
the top (overbucking) (Fig. 21).
 ◾
When the log is supported on only 
one end, cut 1/3 the diameter from 
the underside (underbucking). 
Then make the nishing cut by 
overbucking to meet the rst cut 
(Fig. 22).
 ◾
When the log is supported on both 
ends, cut 1/3 of that diameter from 
the top overbuck. Then make the 
nished cut by underbucking the 
lower 2/3 to meet the rst cut 
(Fig. 23).
21
Log Supported Along the Entire Length
Cut From Top (Overbuck) 
Avoid Cutting Earth
22
Log Supported One End
2nd Cut Overbuck (2/3 Diameter) to Meet 1st Cut 
(To Avoid Pinching)
1st Cut Underbuck (1/3 Diameter) to Avoid Splintering
23
Log Supported Both Ends
1st Cut Overbuck (1/3 Diameter) to Avoid 
Splintering
2nd Cut Underbuck (2/3 Diameter) to Meet 1st Cut 
(To Avoid Pinching)










