Short thread cutter (KFA)
78 Service Instructions 867 - 04.0 - 10/2019
16.3 Adjusting the thread-pulling knife
Fig. 64: Adjusting the thread-pulling knife
Proper setting
When the thread-pulling knife (1) is at rest, the distance between the high-
est point of the control cam (7) and the roller (5) is 0.1 mm.
The control cam (7) makes contact with the set collar (6).
The marking (3) on the thread-pulling knife (1) is adjacent to the cutting
edge of the counter blade (2).
The knife carrier (4) has no axial play, but can still run smoothly.
To adjust the thread-pulling knife:
1. Loosen all 4 screws on the set collar (6) and push the set collar (6)
toward the hook bearing.
2. Tighten all 4 screws on the set collar (6).
3. Loosen both threaded pins on the control cam (7).
4. Turn the lever (8) as far as it will go against the screw (10).
5. Set the distance between the roller (5) and the highest point of
the control cam (7) to 0.1 mm.
6. Tighten both threaded pins on the control cam (7).
7. Loosen the clamping screw (9) on the lever (8).
8. Turn the thread-pulling knife (1) until the marking (3) on the cutting
edge of the counter blade (2) is adjacent to it.
9. Tighten the clamping screw (9). Take care to ensure that there is no
axial play.
(1) - Thread-pulling knife
(2) - Counter blade
(3) - Marking
(4) - Knife carrier
(5) - Roller
(6) - Set collar
(7) - Control cam
(8) - Lever
(9) - Clamping screw
(10) - Screw
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