The charts below will help you to identify the more common ones in use. Should you have an extension that does not conform to any of the parts below, you may be able to define what you need by using the information on the box which show the dimension.
360 turn extensions cannot use Nova locks.
Quarter turn style may use any of the five locks we offer. See LOCKS for more information.
Monarch Extensions are secured to the lock stem by means of set screw. On turn extensions, these may be loosened to provide a tighter or looser fit. This also allows the use of replacement locks without the need to replace the extension as well.
If your current extensions are crimped to the end of the lock, you will need to purchase the extension with your lock. If your extension is screwed onto the lock stem and locked in place by a roll pin through a cross-hole, you should also get the extension when you purchase the lock.
There are very old machines that use the UL lock, these are no longer available. The diameter of the body of the lock is 7/8″ rather than the standard 3/4″. We have an adapter kit to convert them to current style locks.
There are also some older locks which have a female thread in the end and the shaft screws INTO the lock and secured with set screws. These must be ordered as complete units. That lock style is no longer available and the shafts cannot be used with new lock.
For really odd applications there is a coupling we offer without locks that allows one end to be threaded onto the lock. (All of the locks have a non-standard thread, 9/32nds-28) The other end is threaded with a standard 5/16-18 thread to receive an all-thread rod that you can cut to your desired length. Part number EXTC-01S comes with the set screws.
The Sketch below illustrates some of the more common extensions. This is NOT an exhaustive list. Some recent additions may not be shown. Please call with your needs. Complete information is important to meeting your needs. Be sure to study the Illustration at the top of the page to determine what you require.