214733 216 Revision A
4.7.7 Knife Speed
The ideal cutting speed of the knife should achieve a clean cut. Crop types and conditions usually influence the knife and
forward speeds.
Table 4.4 Knife Speed
Header Description
Knife Speed
Type
Size m (ft.)
Minimum Maximum
rpm
5
spm
6
rpm
5
spm
6
Draper with
double knife
4.6 (15)
750 1500 950 1900
Draper with
double knife
6.1 (20)
700 1400 850 1700
Draper with
double knife
7.6 (25)
700 1400 850 1700
Draper with
double knife
9.1 (30)
600 1200 800 1600
Draper with
double knife
10.7 (35)
600 1200 700 1400
Draper with
double knife
12.2 (40)
550 1100 700 1400
Draper with
double knife
13.7 (45)
550 1100 700 1400
When the header is first attached to the windrower, the Harvest Performance Tracker (HPT) receives a code from the
header that determines the knife speed range and the minimum speed.
The desired speed can be programmed and stored in the HPT so the knife will operate at the original set-point after the
header is detached and reattached to the windrower.
Refer to the header operator’s manual for the suggested knife speed for a variety of crops and conditions.
NOTE:
The knife speed cannot be programmed outside the range specified for each header.
OPERATION
5. Revolutions per minute is the speed of knife drive box pulley
6. Strokes per minute of knife (rpm x 2)
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