Coborn SK Series

Scaife Spindles for Diamond Polishing

Coborn scaife (or skive) spindles are precision instruments designed for years of continuous use for diamond polishing.

These spindles have an unmatched reputation in the gem and industrial diamond industry. Spindles are direct drive motors for the scaife plate and normally sold to be fitted to the customer’s own benches. The options are:

• Horsepower (1.5hp or 3hp / 1.1kW or 2.2kW)
• Fixed or variable height
• Standard or self pressurized, air-flow type

If only one diamond is being polished, 1.5hp will be adequate; 3hp is better for multiple users or fixtures.

The Expanding Nose is a very important feature, which ensures the scaife plate is centralized onto the spindle axis for smoother running and makes the changing of scaife plates much easier and now comes as standard on all Skive motor options.

As plates wear, they must be re-machined occasionally. If fixtures are carefully set, then it is useful to be able to raise or lower the height of the plate surface to maintain its working level. A variable spindle is available.

It is recommended dust is removed constantly during use to protect operators. An air-flow type spindle is available. This uses the natural centrifugal action of the high speed rotation of the plate to draw air and dust into the bowl beneath and then to a filter or external exhaust.

We recommend you use a PB2 Portable Balancer to dynamically balance the scaife plate in-situ.