CHAIN TENSIONER AUTOMATIC TYPE
Automatic Type
TH-1
TH-2
MAXTON series automated chain tensioners * Automatic tensioning * Stable vibration dampening * Operates on return side in any position 51.5 71 46 32 17.5 M8 38 M6
48.5
63
28.5
* Simple adjusting * Quick and easy installation
17.5
AUTOMATIC TENSIONER All dimensions in millimeters unless noted.
2-M8
Push-up Force (lbs.) Min. Max
Automated Model Number
Stroke (S)
Chain Size
35
TH1 TH1 TH2 TH2 TH2
25.0 25.0 45.0 45.0 45.0
8.81 8.81
26.44 26.44 66.10 66.10 66.10
2-M8
40, 41
50 60 80
22.03 22.03 22.03
TH-1
TH-2 OB Type
BB Type
48.5
51.5
M6
M8
63
28.5
71
32
17.5
38
17.5
46
S1
S2
TH-1
TH-2
48.5
51.5
M6
M8
9
63
28.5
71
32
9
17.5
38
17.5
46
2-M8
12.7
7
19
（ 15 ）
（ 12 ）
9
9
50
40 65
2-M8
75
44.5
32
25.4
26
2-M8
2-M8
BB Type IDLER SPROCKETS FOR AUTOMATIC TENSIONER OB Type
Idler Sprocket
BB Type
OB Type
Model No.
S1
S2
No. of Teeth
Pitch Diameter (in inches)
Chain Size
BB Type
OB Type
Sintered Bushing ID
Ball Bearing ID
9
9
S1 SP-320-OB SP-320-BB SP-415-OB SP-415-BB
S2
35
20 15 15 14 11
2.397 2.405 3.006 3.371 3.550
40,41
9
50 60 80
9 SP-515-OB SP-515-BB SP-604-OB SP-604-BB （ 15 ） 9
12.7
7
19
（ 12 ）
9
50
40 65
75
44.5
32
25.4
26
-
SP-811-BB
12.7
7
19
（ 15 ）
（ 12 ）
9
9
50
40 65
75
44.5
32
25.4
26
208
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