Precision Lock Nut (KMK Series, KMFE Series, KMT(A) Series, KMD Series)

Specifications

How to choose Lock nuts

Points to check when selecting, with the values for this product (Precision Lock Nut (KMK Series, KMFE Series, KMT(A) Series, KMD Series)).

1. 1. Select the size and standard to match the shaft thread

   The nut must fully match the thread of the shaft or sleeve. Metric fine pitch such as M10×0.75, trapezoidal threads such as Tr220×4, and inch series (ANSI/ABMA) are all listed, so verify the nominal diameter, pitch, and thread standard against the drawing.

2. 2. Do not confuse thread standard series

   This product: Thread standard Metric thread (ISO 965-3)

   Metric KM and HM series and inch N and AN series may look similar but are not interchangeable. Some larger sizes in certain series use trapezoidal threads, so confirm the original standard when repairing existing equipment.

3. 3. Decide the anti-rotation method

   Methods using lock washers, fixing clips, or locking plates require a keyway on the shaft. Integrated types that rotate-lock with set screws or locking pins do not require a keyway and allow quick installation. Also confirm whether accessories are required.

4. 4. Verify axial load capacity

   Nuts receive thrust loads and pressing force during tightening. Listed axial load capacities range widely from 20 to 1340 kN, so confirm sufficient margin against the axial load on the bearing and the force required to press onto a tapered shaft.

5. 5. Check side face runout for precision applications

   This product: Side reference face axial runout Max. 0.005 mm

   In applications such as main spindles with high rotational speed and accuracy, if the nut side face runs out relative to the thread, the bearing tilts and rotational accuracy decreases. Select a precision lock nut and check the axial runout value of the reference side face.

6. 6. Check outer diameter and width for clearance

   Confirm that the nut outer diameter does not interfere with housings or seals, and that the width fits within the thread length of the shaft. Also confirm the applicable spanner number used for tightening and the recommended tightening torque.

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

About Lock nuts and all products

Description

Secures the shaft by friction. Loosening torque varies with the tightening torque of the set screws or fixing screws and with the amount of lubrication, so correct installation is required. KMT/KMTA allows fine adjustment with the locking pin, and KMD features a two-piece structure that supports frequent mounting and dismounting.

FAQ

Q. What types of fixing are available for the KMK Series, KMFE Series, KMT(A) Series, and KMD Series precision lock nuts?

A. There are four types: integrated fixing type, set screw type, locking pin type, and axial set screw type, each providing fixing force suited to the application.

Q. Can fine adjustment of the fixing be made with the KMT and KMTA Series precision lock nuts?

A. Yes, the KMT/KMTA allows fine adjustment with the locking pin.

Q. Do the KMD Series precision lock nuts support frequent mounting and dismounting?

A. Yes, the KMD features a two-piece structure that supports frequent mounting and dismounting.

Q. What is the thread standard and the axial runout of the reference side face for the KMK Series, KMFE Series, KMT(A) Series, and KMD Series precision lock nuts?

A. The thread standard is metric thread (ISO 965-3). The maximum axial runout of the reference side face is 0,005 mm.

Q. What types of bearing fixing are the KMK Series, KMFE Series, KMT(A) Series, and KMD Series precision lock nuts used for?

A. They are used for securing precision bearings and general bearings.

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

Source documents

• Catalog 軸受付属品（アダプタスリーブ・取り外しスリーブ・ロックナット） 74 pages Open page 18
  Found on: https://azuma-eg.com/catalogue/