Zero-Max PSL-G Posi-Lok Operating instructions

Brand
Zero-Max
Model
PSL-G Posi-Lok
Type
Operating instructions

Zero-Max PSL-G Posi-Lok is a keyless bushing that provides a secure, backlash-free connection between a shaft and a hub without the need for a keyway or other mechanical fastening devices. It is ideal for applications where high torque, precision, and reliability are required.

The Posi-Lok is made from high-strength steel and features a unique tapered design that creates a wedging action between the shaft and the hub. This wedging action generates high clamping forces, even under heavy loads, eliminating backlash and ensuring a positive drive.

The Posi-Lok is easy to install and remove, and it can be reused multiple times. It is a versatile bushing that can be used in a wide range of applications, including:

Zero-Max PSL-G Posi-Lok is a keyless bushing that provides a secure, backlash-free connection between a shaft and a hub without the need for a keyway or other mechanical fastening devices. It is ideal for applications where high torque, precision, and reliability are required.

The Posi-Lok is made from high-strength steel and features a unique tapered design that creates a wedging action between the shaft and the hub. This wedging action generates high clamping forces, even under heavy loads, eliminating backlash and ensuring a positive drive.

The Posi-Lok is easy to install and remove, and it can be reused multiple times. It is a versatile bushing that can be used in a wide range of applications, including:

Tools Required
• Calibrated torque wrench
• Cleaning cloth
• Caliper
These instructions are for standard Posi-Lok G-series
keyless shaft bushings with normal running and
environmental conditions. Special models or conditions
may require dierent instructions.
Verify shaft and hub dimensions are within the specied
range. Wipe rust,
dust, and oil
completely o of all
mating surfaces on
the shaft, hub, and
Posi-Lok. Do not
disassemble Posi-
Lok parts. Never
allow oil containing
molybdenum
disulde or grease to contact these surfaces as it will
aect the coecient of friction.
Do not tighten the clamping screws before installation.
Slide the Posi-Lok
onto the shaft and
slide the hub being
mounted over the
outside diameter
of the Posi-
Lok. Loosen the
clamping screws
slightly if necessary.
Position the Posi-
Lok assembly to the
desired location,
making sure both
the shaft and the
hub engage the
full length of the bushing. Hand tighten each clamping
screw lightly to gently grip the hub and shaft.
Using a calibrated torque wrench, tighten the clamping
screws gradually and evenly in a diagonal pattern.
For best results it is recommended to use at least (4)
tightening iterations to reach the specied tightening
torque (see page 2), evenly increasing the tightening
torque each iteration (for example, 25% each time if using
4 iterations).
Make a nal tightening of all clamping screws in a
sequential pattern to the specied torque using a
calibrated torque wrench. Do not over tighten. Check the
tightening torque again periodically after operating.
Caution: Rotating equipment is potentially
dangerous and should be properly guarded. It is
the responsibility of the machine builder, user, or
operator to follow all applicable safety codes and
provide a suitable guard. Make sure the machine
is “locked out” and cannot be accidently started
during installation or maintenance of bushing.
Posi-Lok® Keyless Bushing
Instructions
PSL-G(-C)
Installation Instructions for
PSL-G(-C) Series
13200 Sixth Avenue North, Plymouth, MN 55441-5509
Phone 763.546.4300  Fax 763.546.8260   TOLL FREE 1.800.533.1731   www.zero-max.com Rev2.01
Shaft
Hub
PSL-G
Posi-Lok
Removal
Make sure there is no torque or load applied to the
Posi-Lok. Ensure safety.
Gradually loosen each clamping screw to release the
Posi-Lok.
Do not forcibly remove the Posi-Lok as it may cause
damage to the shaft, hub, and/or body. If necessary, rst
tap the heads of the
clamping screws to
release the rear
taper. Next, insert
screws into the
detachment
screw holes
(which are one
size larger than
the clamping
screws), tighten
evenly, and tap the
screw heads to
release the front taper.
PSL-G(-C)
Clamping Screw
Quantity
Clamping
Screw Size
Tightening
Torque [in-lb]
Detachment
Screw Size
19-25(-C) 8M6 150 M8
28-30(-C) 10 M6 150 M8
32-35(-C) 12 M6 150 M8
38-40(-C) 14 M6 150 M8
42-50(-C) 12 M8 363 (30 ft-lb) M10
55-60(-C) 14 M8 363 (30 ft-lb) M10
65 16 M8 363 (30 ft-lb) M10
70-80 14 M10 726 (61 ft-lb) M12
85-90 16 M10 726 (61 ft-lb) M12
95 18 M10 726 (61 ft-lb) M12
100-110 14 M12 1,257 (105 ft-lb) M14
120 16 M12 1,257 (105 ft-lb) M14
Posi-Lok® Keyless Bushing Instructions
PSL-G(-C)
13200 Sixth Avenue North, Plymouth, MN 55441-5509
Phone 763.546.4300  Fax 763.546.8260   TOLL FREE 1.800.533.1731   www.zero-max.com Rev2.01
Caution: The Posi-Lok bushing is designed
to release immediately when clamp screws
are loosened
Detachment Screw Hole
Clamping Screw
Clamping screw ghtening torque
Removal Instructions for PSL-G(-C) Series
  • Page 1 1
  • Page 2 2

Zero-Max PSL-G Posi-Lok Operating instructions

Brand
Zero-Max
Model
PSL-G Posi-Lok
Type
Operating instructions

Zero-Max PSL-G Posi-Lok is a keyless bushing that provides a secure, backlash-free connection between a shaft and a hub without the need for a keyway or other mechanical fastening devices. It is ideal for applications where high torque, precision, and reliability are required.

The Posi-Lok is made from high-strength steel and features a unique tapered design that creates a wedging action between the shaft and the hub. This wedging action generates high clamping forces, even under heavy loads, eliminating backlash and ensuring a positive drive.

The Posi-Lok is easy to install and remove, and it can be reused multiple times. It is a versatile bushing that can be used in a wide range of applications, including:

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