Using YINSH nuts, what problems might happen often and their solutions, please read.
Troubleshooting Possible Reasons Countermeasures
The Yinsh locknut doesn't match the threads on the spindle.
1.
Mis-matched thread pitch between locknut and spindle threads.
2. Warpage or Warpage at threaded area of spindle.
3. Superficial damage to thread ridges, or fragments thereof.
4. Possible reverse threading of either spindle or locknut .
5. Mismatched thread diameters .
6. External spindle thread diameter too large.
7. Non-standard spindle thread specifications.
1. Examine thread pitch of both locknut and spindle, making sure they match.
2. Measure three equidistant points on the spindle thread diameter with needle gauge to determine any discrepancy.
3. If threads are damaged or any fragments thereof can be found, smooth out with a fine triangle file, clean, lubricate, and reassemble.
4. Examine to determine if thread directions conflict. If they do, you're using the wrong lock nut.
5. Measure both thread diameters with calipers to be sure the sizes match.
6. Use feeler gauges to determine thread sizes match.
7. Use a profile projector to be sure spindle threads are 60 degrees.
The locknut fits and locks, but can't be removed.
1. Slackened off lock screws.




2. Dirty threads.
3. Damaged threads.


1. If the lock screws are loosened off and the lock nut still won't come free, it could mean the copper thread locks which the lock screws tighten against are jammed against the spindle threads. Lightly tap at the locking screw locations to jar them free. Snug up each lock screw and loosen off once again to free the locknut.
2. Clean all threads and surfaces with an appropriate industrial cleaner and lubricate properly
3. If threads are damaged or any fragments thereof can be found, smooth out with a fine triangle file, clean, lubricate, and reassemble.

The locknut fits and locks, but loosens off on its own.
1. Threads that match, but have too much slack between them.
2. Wrong choice in model of locknut.
3. Improperly tightened locknuts.
1. Check to see if external threads are too small.
2. According to the type of machine, the correct model of locknut must be chosen. Consult an Yinsh agent for proper selection.
3. Be sure that locknut is tightened with a torque wrench and that lock screws are evenly tightened.
The locknut fits and locks, but spindle lacks precision.
1. Lack of parallel between spindle center and its outer threads.
2. Unequal tightening of lock screws.
3. Use of wrong tool in tightening lock screws.
4. Dirty threads.
1. Have the spindle threads professionally re-turned or re-ground
2. Back off all lock screws and finger tighten evenly. Then tighten incrementally with even pressure.
3. Do not tap to adjust. Must employ use of proper torque wrench.
4. Clean all threads and surfaces with an appropriate industrial cleaner and lubricate properly

 
Note: YS / SBL / YINSH products are subject to a $250.00 minimum order.
These products are not stocked in the USA. Please allow for delivery time from the far east.

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