Round Shape Synthetic Bearing For Precision Instruments With Through Hole

Sapphire precision parts are generally used in the wear-resistant and high-temperature parts of instruments, meters, and equipment.

Gem bearings are sliding bearings made of hard materials such as gemstones. A natural or synthetic gem (usually a sapphire) that, after careful grinding, is carefully ground out in a conical hole and can be used as a bearing for the head-turning shaft or for other precision instruments.

Gem bearings are mainly used in instrumentation. Instrument bearings bear a small load, but to rotate high accuracy, good sensitivity, long service life. Gemstones have small friction, high hardness, corrosion resistance, low coefficient of thermal expansion, high performance of pressure strength, to meet the requirements of the use of instrument bearings. The materials for making gem shafts include corundum, agate, microcrystalline glass, etc. Corundum is the body of alumina, natural and man-made. Natural corundum impurities are more, uneven texture, so artificial corundum is the most widely used.

(1) The cone of the outer circle of the grooved gem bearing shall not exceed one and a half of the allowable deviation of its outer diameter.
(2) The parallelity of the two ends of a slotted gem bearing shall not exceed one and a half of its height allowable deviation.
(3) The verticality of the outer circle of the grooved gem bearing to the bottom face is not greater than 0.005.
(4) The coaxiality of the grooved gem bearing groove and the outer circle: the conical bearing is not greater than 0.02mm, and the spherical bearing is not greater than 0.03mm.

Why US?

1. We’re the rare source manufacturer of color sapphire boule, and the most professional factory of sapphire processing, especially the special watch case.

2. We have our own sapphire grown equipent with CZ and KY method.

3. Professional customized production according to the drawing provided by clients.

4. Precision work of sapphire processing and polishing.

5. Experienced technicians and skilled workers.

FQA

1. Are you a trading company or factory?

We are a professional factory of sapphire products, also a trading company .

2.Can you do customized products?

Yes, we specialized in customized production or OEM work.

CAD,3D drawing are needed.

3.Could you provide samples?

Yes, we could provide samples with a charge, but if you place the order with a quality above 100pcs, the sample charge will be refunded.

4.What’s the delivery time?

It depends on the type of products and the quality.

For watch case, the regular time is around 5-8 weeks for 200pcs according to the difficulty of the processing.

5.How about the payment?

T/T payment is prefered.

6.How about the delivery?

Mostly by air, like DHL, Fedex.