Installation and removal
- With the bearing in position, screw the lock nut into place.
- Tighten the nut with a hook or impact spanner making sure not to over tighten it.
- Tighten the grub screws carefully until the locking pins engage the shaft thread.
- Tighten the grub screws alternately with a torque wrench until the recommended torque value, listed in the product table, is achieved.
KMT and KMTA precision lock nuts should not be used to drive a bearing up onto a tapered seat.
KMT and KMTA lock nuts are adjustable. The three, equally-spaced locking pins enable these lock nuts to be accurately positioned at right angles to the shaft. However, they can also be adjusted to compensate for slight angular deviations of adjacent components.Adjustments can be made using the following procedure (fig. 4 and fig. 5):
- Loosen the grub screw(s) at the position showing the greatest deviation.
- Tighten the remaining screw(s) equally.
- Retighten the screw(s) that were loosened.
- Check that the alignment of the nut, relative to the shaft, is currently as required.
- Repeat the procedure if necessary.