3
Torque-Limiter
Clutches
Stock Plate Sprockets with Ground
Face and Bored to Fit the Martin
Torque Limiter
Sprocket Size
35TTA25-25
35TTA26-25
40TTA20-25
40TTA22-25
40TTA24-25
40TTA28-25
40TTA30-25
50TTA17-25
50TTA21-25
50TTA22-25
Sprocket Size
35TTA35-35
35TTA40-35
40TTA28-35
40TTA30-35
40TTA32-35
50TTA22-35
50TTA24-35
50TTA25-35
50TTA26-35
60TTA18-35
60TTA20-35
TT25 1 300 700 400 1200 2
1
⁄2 1
3
⁄4
1
⁄8
11
⁄32
29
⁄64
19
⁄64
19
⁄64 2
1
⁄2 1
1
⁄2 1.368 1.631/1.628
TT35 2.5 600 1700 900 2500 3
1
⁄2 2
7
⁄16
1
⁄8
5
⁄8
45
⁄64
23
⁄64
35
⁄64 3
3
⁄16 1
15
⁄16 1.675 2.006/2.003
TT50 6 950 2650 2350 5700 5 2
7
⁄8
1
⁄8
5
⁄8
53
⁄64
29
⁄64
21
⁄32 4
5
⁄16 2
13
⁄16 2.625 3.008/3.005
TT70 18 2100 8000 3100 11500 7 3
7
⁄8
1
⁄4 1
1
⁄4
55
⁄64
31
⁄64
29
⁄32 6 4 3.811 4.197/4.194
Torque Rating ▲ CKL
(Pound-Inches) +.000 +.003
With One With Two –.002 –.000
Size Avg. Spring Springs** G Spline Spkt.
No. Wt.
Min. Max. Min. Max
A B Min. Max. D E
♦ H J O. D. Bore
Torque-Limiter Clutch Ratings
TT25
1
⁄2
7
⁄8 1
TT35
3
⁄4 1
3
⁄16 1
1
⁄4
TT50 1 1
3
⁄4 2
TT70 1
3
⁄8 2
3
⁄4 3
Size Stock
Max. Bore
No. Bore Std. KW* Shallow KW*
1
⁄2-
9
⁄16
1
⁄8 ×
1
⁄16 1
7
⁄16-1
3
⁄4
3
⁄8 ×
3
⁄16
5
⁄8-
7
⁄8
3
⁄16 ×
3
⁄32 1
13
⁄16-2
1
⁄4
1
⁄2 ×
1
⁄4
15
⁄16-1
1
⁄4
1
⁄4 ×
1
⁄8 2
5
⁄16-2
3
⁄4
5
⁄8 ×
5
⁄16
1
5
⁄16-1
3
⁄8
5
⁄16 ×
5
⁄32 3
13
⁄16-3
3
⁄4 ×
3
⁄8
Torque- Torque-
Limiter Limiter
Bore Keyway Bore Keyway
TT25
1
⁄2
5
⁄8
3
⁄4
7
⁄8
TT35
3
⁄4
7
⁄8 1
TT50 1 1
1
⁄8 1
3
⁄16 1
1
⁄4 1
3
⁄8 1
7
⁄16 1
1
⁄2 1
5
⁄8
TT70 1
7
⁄16 1
1
⁄2 1
3
⁄4 1
15
⁄16 2 2
7
⁄16
Size
No. Finished Bores
STK. 25 19 19 16 .. .. .. .. .. ..
TT25 Min. Teeth MTO 25 19 19 16 .. .. .. .. .. ..
Bush. Lght. Req’d.
1
⁄8
1
⁄8
1
⁄4
1
⁄4 .. .. .. .. .. ..
STK. 35 25 26 21 18 15 .. .. .. ..
TT35 Min. Teeth MTO 33 25 26 21 18 15 .. .. .. ..
Bush. Lght. Req’d.
1
⁄8
1
⁄8
1
⁄4
1
⁄4
3
⁄8
3
⁄8 .. .. .. ..
STK. 48 35 35 29 25 19 .. .. .. ..
TT50 Min. Teeth MTO 46 35 35 29 25 19 .. .. .. ..
Bush. Lght. Req’d.
1
⁄8
1
⁄8
1
⁄4
1
⁄4
3
⁄8
3
⁄8 .. .. .. ..
STK. .. .. 48 38 33 26 21 18 16 14
TT70 Min. Teeth MTO .. .. 48 38 33 26 21 18 16 14
Bush. Lght. Req’d. .. ..
1
⁄4
1
⁄4
3
⁄8
3
⁄8
1
⁄2
7
⁄8
7
⁄8 1
Unit
Min. Allowable Sprocket Teeth and Length of Bushing Req’d for Chain Number
Size Sprocket Pitch 35 41 40 50 60 80 100 120 140 160
★ Min. number of teeth on sprocket stocked by factory which can be used w/Torque-Limiter clutch.
Min. number of teeth on made-to-order sprocket which will permit chain to clear friction disc.
* Use one
3
⁄8″ long bushing and one
1
⁄2″ long.
♦ Use two
1
⁄2″ long bushings.
† KW Same as Std. Listed in Tables Above. Additional S.S. See List Price
Bored to Size Torque Limiters w/Std. KW & I-SS
†
† Additional SS See List Price Alterations
* KW To Be Cut Central w/Threaded Spline
Standard Keyways
Stock Bores — Torque Limiters (No KW I-SS
†
)
▲ Using a center member with rubbing sides ground
parallel — 65 to 125 micro-inches. Center member
must be clean and free from oil, rust, etc.
** Second spring may be nested in one originally fur-
nished. Order if required.
♦ Nominal for maximum torque setting. For minimum
torque setting, add
3
⁄64 for No. 25;
5
⁄64 for No. 35;
3
⁄32 for
Nos. 50 and 70. When two springs are used this
dimension is increased approximately
1
⁄16″ on Nos.
25, 35 and 50 —
3
⁄32″ on No. 70.
TORQUE-LIMITER CLUTCHES
Each assembled unit contains one
spring. Higher ratings can be obtained
by ordering a second spring to nest in
the original one. Bushings need to be
ordered separately if required.
The rubbing sides of the center
member should be ground parallel —
65 to 125 micro-inches.
Sprocket Size
40TTA35-50
50TTA30-50
50TTA32-50
60TTA25-50
60TTA26-50
60TTA28-50
60TTA30-50
80TTA20-50
80TTA22-50
80TTA24-50
Sprocket Size
60TTA36-70
80TTA26-70
80TTA28-70
80TTA30-70
80TTA36-70
100TTA22-70
100TTA24-70
PRESSURE PLATE 2
FRICTION DISC 2
ADJ. NUT ASSY. & S.S. 1
ADJ. TENSION NUT 3
HUB 1
TT25 TT50
TT35 TT70 QTY. REG.*
SPARE PARTS
UNIT TT25 UNIT TT35
UNIT TT50 UNIT TT70
* PER UNIT
B
GE
C
ED
JLK
A
Comentarios a estos manuales