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RunRight® RT F tensioners are designed for front mounting applications where access to back side or rear mounting surfaces is not possible. A single threaded hole is required to mount these tensioners. These tensioners include a special mounting screw and spacer bushing. They are manufactured with powder metal or cast iron housings, cast iron arms and inner square, come with the standard Tensys™ 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range.

Unit of Measure

Specifications

Description 

N/A RT F38 FRONT MOUNT TENSIONER

Type

N/A Chain/Belt Tensioner

Element Material

N/A Natural Rubber

Style

N/A Elastomeric

Color

N/A Black

UPC Number

N/A 53279

Dimensional Data

Tensioner

N/A RT F38

Mounting Bolt Size

N/A M12

Outside Diameter (Dim D)

N/A 3.74 in95 mm

Overall Length (Dim E)

N/A 5.51 in140 mm

Idler Bolt Size

N/A 3/4 - 10 x 5

Dimension L

N/A 8.07 in205 mm

Dimension J-1

N/A 6.89 in175 mm

Dimension J-2

N/A 5.51 in140 mm

Dimension M

N/A 0.63 in16 mm

Dimension R

N/A 0.67 in17 mm

Dimension G

N/A 0.39 in10 mm

Dimension O

N/A 0.59 in15 mm

Dimension P

N/A 0.49 in12.5 mm

Dimension K

N/A 2.36 in60 mm

Cubic inches

N/A 166.30172 in³

Performance Data

Normal Temperature Range

N/A -40 to 180 ºF-40 to 80 ºC

Force at 20° Angle of Pretension (Normal Force Level) (Dimension F)

N/A 164.1 lb730 N

Distance at 20° Angle of Pretension (Normal Force Level) (Dimension S)

N/A 2.4 in60 mm

Notes

Notes 

N/A
  • The recommended angle of pretension is 20°. This provides the tensioner a maximum capability to absorb vibrations and shock loads, while also maintaining a range of motion to address the system’s belt or chain stretch.
  • Mounting accessories into the “Hard” Position results in approximately 25% higher tensioning force over the “normal” position.
  • Inch (imperial) standard tensioner units all come with both the mounting screw and a zinc-plated idler bolt with nuts.
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