Repair resources

Why you need to replace your Hermle Movement.

With age, the mechanical clock movements oil solidifies and becomes black and sticky. By the time 20 or 30 years go by, the oil has solidified and is creating wear on the movements brass plates.

If you look at your old clock movement, you will see holes in the brass plates where there are small pivot arbors sticking into these holes. These pivots are what the gears of the clock ride upon and as the pivots spin in the solidified oil, this makes the holes oblong instead of round. With the pivot holes oblong, the holes are pinching the pivots and creating resistance in the gear train. With the solidified oil and the pinched pivots, the clock will eventually stop working or chiming.

There are basically two types of clock mainsprings. They are hole end and loop end. The hole end is used inside a barrel and has a "D" or oval shaped hole at one end of the mainspring. This allows the mainspring to be attached to a fixed point such as a barrel hook. The loop end has either an oval or round closed end to allow a post or other fixed movement stem to be used as the "anchor" of the mainspring. On smaller loop end mainsprings, the loop end can be open.

Bushing Chart for Bergeon Bushings: Brass or Bronze

Bushing Chart for American-made ButterBushings in KWM sizes and German-made KWM Bushings

When the Sherline lathe first came on the market over thirty years ago, its use of rigid, extruded components meant miniature machine tools were no longer just toys for producing simple hobby projects. They could now be considered serious machine tools built specially to produce accurate, small parts. Since then, we have not only added a vertical milling machine and extensive accessory line, we have also found ways to improve the accuracy and utility of the tools themselves. The introduction of CNC machines into our production facility has greatly improved the accuracy of Sherline tools. The lathes feature precision rolled leadscrews and handwheels graduated in thousandths of an inch (.001”) or hundredths of a millimeter (.01 mm).