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2015 Power Transmission Products
General Information
157
OBJECTIVE:
Continental ContiTech Synchronous timing belts
must be installed and tensioned properly to ensure optimum
performance. Sprocket alignment must be preserved while
tensioning the drive.
Before beginning, inspect the belt for damage and verify that
the sprockets are properly mounted. Refer to sprocket and
bushing manufacturer installation procedure. Belts should
never be crimped or bent to a diameter less than the minimum
sprocket diameter, approximately 2.5 inches for 8mm belts and
5 inches for 14mm belts.
1.
Shorten the center distance or release the tensioning idler
to install the belt. Do not pry the belt onto the sprocket. Refer
to the following Center Distance Allowance tables for required
center distance adjustment.
Apply the following center distance allowances for the Hawk
Pd® and Falcon Pd.® A center distance adjustment or decrease
in center distance, is necessary to install a belt. In addition,
an increase in center distance will be necessary for proper
tensioning. If you install a belt together with sprockets, allow
the following decrease in center distance for installation and
an increase in center distance for tensioning.
If you install a belt over one flanged sprocket and one
unflanged sprocket with the sprockets already installed on the
drive, allow the following decrease in center distance for
installation and increase in center distance for tensioning.
If you install the belt over two flanged sprockets that are
already installed on the drive, allow the following decrease in
center distance for installation and increase in center distance
for tensioning.
Consider the following center distance allowances when
installing SilentSync® sprockets. Since flanges are not
necessary on SilentSync® drives, only one table of center
distance allowances is provided.
Technical Information
Belt installation and tensioning
Pitch Length
Range (mm)
Allowance (decrease)
for Installation
Allowance (increase)
for Take-Up
8m, 14m Belts
(mm/in.)
8m, 14m Belts
(mm/in.)
Less than 1525
2.5/0.1
2.5/0.1
1525-3050
5.0/0.2
5.0/0.2
Greater than 3050 7.5/0.3
7.5/0.3
Pitch Length
Range (mm)
Allowance (decrease)
for Installation
Allowance
(increase)
for Take-Up
8m Belts
(mm/in.)
14m Belts
(mm/in.)
8m, 14m Belts
(mm/in.)
Less than 1525
22.5/0.9
36.5/1.4
2.5/0.1
1525-3050
25.0/1.0
39.0/1.5
5.0/0.2
Greater than 3050 27.5/1.1
41.5/1.6
7.5/0.3
Pitch Length
Range (mm)
Allowance (decrease)
for Installation
Allowance
(increase)
for Take-Up
8m Belts
(mm/in.)
14m Belts
(mm/in.)
8m, 14m Belts
(mm/in.)
Less than 1525
34.5/1.4
59.2/2.3
2.5/0.1
1525-3050
37.0/1.5
62.0/2.4
5.0/0.2
Greater than 3050 39.5/1.6
64.5/2.5
7.5/0.3
General Information
Automotive & Truck
Specialty
Bushing Hardware
V-Belt
Banded
Synchronous
Overview