3-18
Quality
Transmission
Components
Quality Transmission Components
125 Railroad Avenue, Garden City Park, NY 11040-5016
Phone: (516) 437-6700 • Fax: (516) 328-3343
e-mail: support@econobelt.com
www econobelt com
www.econobelt.com
QCT-ETR103S
QCT-ETR103D
QCT-ETR104S
QCT-ETR104D
QCT-ETR205S
QCT-ETR205D
QCT-ETR206S
QCT-ETR206D
QCT-ETR308S
QCT-ETR308D
ETR Type Tensioner
For 3/8" to 1" Pitch Roller Chains
Sprockets with Ball Bearing – Spring-Loaded
=
=
M
C
B
Q
Q
R
R
Q
Q
R A
R
F
D
=
=
E
N
O
H G
I
L
LOAD
Double (D)
Single (S)
Integral
"End-of-stroke" sensing
switch is available on
special order.
Automatically keeps the tension constant.
21
16
17
15
12
3/8" X 7/32"
1/2" x 5/16"
5/8" x 3/8"
3/4" x 7/16"
1" x 17 mm.
Catalog
Number
A
B
C
D
E
F
G
H
I
L
Q
R
M
N
O
Chain
Pitch
20
20
25
25
30
23
23
28
28
33
12.5
12.5
15
15
17.5
11
11
12.5
12.5
14.5
56.2
56.2
70.5
70.5
82
7
7
9
9
9
58
58
70
70
86
74
74
87
87
104
99
99
127
127
151
127
127
163
163
193
–
–
–
–
21
–
–
–
–
35
130
130
180
180
300
250
250
420
420
650
Load
(N)
Min Max
19.7
18
19.7
16.5
19.7
21.8
19.7
19.4
19.4
26.4
–
–
–
–
70
9.2
11
9.2
12.5
9.2
15.3
9.2
17.7
8.9
26.4
MATERIAL: Base & Mounting Head – High-Tensile Die-Cast Aluminum Alloy
Slide Arms – High-Tensile Steel (Zinc Plated)
Sprocket – Steel (Heat-Treated)
NOTE: Orientation of sprocket is supplied as shown. End user can reposition if necessary.
All dimensions are in mm unless otherwise noted.
