Halyard attachment hole, Coupler attachment hole, Aft of existing hole – Harken HC7906 18 mm Battcar Switch System User Manual
Page 18: Drill 11 mm
18
Headboard coupler attaches to standard headboards. Some headboard modification required.
Maximum thickness of headboard plates and sail: 14 mm (
9
/
16
").
Halyard attachment hole
Use aft hole if headboard has two (2).
If not, drill second hole to accept halyard shackle pin.
Locate hole approximately 64 mm (2
1
/
2
") aft of existing hole.
Coupler attachment hole
Drill 11 mm (
7
/
16
") coupler attachment hole so center
is 101 mm (4") from top of headboard and 51 mm (2")
from front edge of boltrope.
Leave at least 9 mm (
3
/
8
") between front of headboard
plate and front edge of coupler attachment hole.
Installing Headboard Car Assembly
Sailmakers Instructions
Slug-Mount / Drill and Tap Mount
Dimensions (measured from aft face of mast)
100mm
(4")
51 mm (2")
Min 9.5 mm
(
3
/
8
")
Coupler
attachment hole
Mounted on slug mount track
A
B
C boltrope setback
D
E pin Ø
F stud Ø
Part No.
Description
in
mm
in
mm
in
mm
in
mm
mm
mm
HC7906
Headboard car
7
13
/
16
198
1
1
/
4
31
2
9
/
16
65
4
3
/
16
106
6
—
HC7905
Intermediate car
2
1
/
2
63
1
1
/
4
31
2
9
/
16
65
3
/
4
19
6
—
HC8537
Batten car (10 mm stud)
2
1
/
2
63
1
1
/
4
31
2
9
/
16
65
3
9
/
16
90
6
10
HC7906HL
Headboard car
7
13
/
16
198
1
1
/
4
31
2
9
/
16
65
4
3
/
16
106
6
—
HC7905HL
Intermediate car
2
1
/
2
63
1
1
/
4
31
2
9
/
16
65
3
/
4
19
6
—
HC7904HL
Batten car (12 mm stud)
2
1
/
2
63
1
1
/
4
31
2
9
/
16
65
3
3
/
4
95
6
12
HC8537HL
Batten car (10 mm stud)
2
1
/
2
63
1
1
/
4
31
2
9
/
16
65
3
9
/
16
90
6
10
Mounted on drill tap track
A
B
C boltrope setback
D
E pin Ø
F stud Ø
Part No.
Description
in
mm
in
mm
in
mm
in
mm
mm
mm
HC7906
Headboard car
7
13
/
16
198
1
1
/
8
29
2
15
/
32
62
4
1
/
16
103
6
—
HC7905
Intermediate car
2
1
/
2
63
1
1
/
8
29
2
15
/
32
62
3
/
4
19
6
—
HC8537
Batten car (10 mm stud)
2
1
/
2
63
1
1
/
8
29
2
15
/
32
62
3
7
/
16
88
6
10
HC7906HL
Headboard car
7
13
/
16
198
1
1
/
8
29
2
15
/
32
62
4
1
/
16
103
6
—
HC7905HL
Intermediate car
2
1
/
2
63
1
1
/
8
29
2
15
/
32
62
3
/
4
19
6
—
HC7904HL
Batten car (12 mm stud)
2
1
/
2
63
1
1
/
8
29
2
15
/
32
62
3
5
/
8
92
6
12
HC8537HL
Batten car (10 mm stud)
2
1
/
2
63
1
1
/
8
29
2
15
/
32
62
3
7
/
16
88
6
10
64 mm
(2
1
/
2
")
Halyard
attachment
hole
HC7906
HC7906HL
C
B
A
E
D
HC7905
HC7905HL
A
E
D
B
HC7904HL
HC8537HL
HC8537
D
E
B
C
A
F