Posi-Lock PSL-K-F (Stainless Steel Type)

Specifications

How to choose Friction joint

Points to check when selecting, with the values for this product (Posi-Lock PSL-K-F (Stainless Steel Type)).

1. 1. Match the Shaft Diameter and Boss Bore Diameter

   The applicable shaft diameter d is the outer diameter of the shaft to be installed, and the outer diameter D is the dimension that fits into the boss bore. Friction fastening depends on controlling the fit clearance, so also confirm that the shaft and boss bore can be machined to the manufacturer's specified tolerances and surface roughness.

2. 2. Allow a Margin in Allowable Transmission Torque

   If the allowable transmission torque T is exceeded, the fastening surfaces slip, causing misalignment and wear. Select based not only on the motor's rated torque but also on the peak torque during startup or impact loads multiplied by a service factor.

3. 3. Check Simultaneous Action with Thrust Force

   For applications with axial loads, check the allowable thrust force. When torque and thrust force act simultaneously, they share the friction force, so each allowable value may not be usable independently; confirm the manufacturer's handling of combined loads.

4. 4. Examine Boss Strength from Side Pressure on the Boss

   During fastening, surface pressure acts on the inner surface of the boss, which pushes it outward. Calculate the required boss outer diameter and wall thickness from the boss side pressure and the yield point of the boss material, and for thin-walled bosses or low-strength materials such as aluminum, check for breakage or deformation. Examine the shaft side in the same way using the shaft side pressure.

5. 5. Review the Relationship Between Overall Length and Boss Width

   The overall length L is the axial fastening length. If the boss width is shorter than this, the fastening surface is insufficient and the performance will not be achieved. Together with the installation space, confirm that the boss width satisfies the overall length and that working space for bolt heads and tools is secured.

6. 6. Tighten Evenly to the Specified Tightening Torque

   Because transmission performance depends on the clamping force of the clamping bolts, control the tightening torque (1 to 142 N·m for the listed products) with a torque wrench, and tighten evenly in several passes following a diagonal sequence. Also confirm in advance the required tool size and how to use the removal screw holes.

This guide was written by AI based on the listed products' documents and specification items.

About Friction joint and all products

Description

The body is made of SUS304, and the clamping bolts are made of SUH660 with a solid lubricant coating. The tightening torque is set lower than the standard specification.

FAQ

Q. What materials are used for the body and bolts of the Posi-Lock PSL-K-F (Stainless Steel Type)?

A. The body is SUS304, and the clamping bolts are SUH660 with a solid lubricant coating.

Q. What applications is the PSL-K-F (Stainless Steel Type) suitable for?

A. It can be used for fastening shafts and hubs and for power transmission sections that require corrosion resistance.

Q. What are the clamping bolt size and tightening torque range for the PSL-K-F?

A. The bolt nominal diameter is M4 to M6, and the bolt tightening torque is 2 to 12 N·m.

Q. Does the PSL-K-F have a different tightening torque compared with the standard specification?

A. Yes, the tightening torque is set lower than the standard specification.

Written by AI based on the content of the source documents.

Source documents

• Manual ポジロック PSL-K 取扱説明書 8 pages Open page 1
  Found on: https://www.mikipulley.co.jp/friction-locking-devices/mechanical/