DP- 4 Dynamic Pivot Tensioner
The Dynamic Tensioner uses just a small space
to provide constant pressure against a belt even as wear and
stretch occur. Plus the tensioner can be locked statically
into place if desired after tension is set.
Tensioner stroke - .50 inches (12.7mm) over a 22 degree arc
Range of adjustment - 1.12 inches (28.4mm)
Maximum force against belt - 5 pounds (2.3 kg) continuous,
15 pounds (6.8 kg) peak (10 pounds (4.6 kg) continuous available)
** Tensioner Height:
* Mounting Data:
footprint without idler pulley of 1.70 inches (43.2mm) wide
by 2.55 inches
(64.8 mm) long
clearance from mounting surface to bottom of pulley is .23
inches (5.8mm) except plastic
sleeve bearings require .28 inches (7.1 mm) minimum clearance.
one hole tapped 10-32 or M5 x .8 either through sheetmetal,
or blind hole with minimum
.38 thread depth. Also needs one .25 diameter by .25 min depth
See drawing below.
To find your tensioner height, determine Pulley Width + Belt
Clearance desired = X
X is less than or equal to .675 (17.1mm), tensioner height
is 1.000 (25.4mm)
X is between .675 (17.1mm) and .950 (24.1mm), tensioner height
is 1.275 (32.4mm)
X is larger than .950 (24.1mm), consult York Engineering.
York tensioners are designed to mount securely onto a flat surface with just a single screw. The
tensioners allow minimal clearance between the belt and mounting surface. Tensioners also feature
different shaft lengths so they are also adjustable by York to provide greater clearance heights if
needed. The York website's Tensioner Configuration Tools automatically account for shaft changes,
if needed, when they create the specific tensioner part number for your application. Where even
greater belt clearances are needed, York can provide machined, anodized spacers to act as a raised
tensioner mounting base. Spacers are available in custom thicknesses while standard catalog
spacers .38 inches thick (9.7mm) for Size 4 and .25 inches (6.4mm) for Size 3 tensioners are always
in stock at York. Spacers are shown below and fit within the same footprint as the tensioners
themselves. The spacer part numbering system uses the last two digits of the part number to indicate
the thickness in decimal inches, with a tolerance of +/- .01.