SK Series

Scaif Spindles for Diamond Polishing

Coborn scaif (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 scaif 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 scaif plate is centralised onto the spindle axis for smoother running and makes the changing of scaif plates much easier.

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 scaif plate in-situ.

Strengths

• Extreme rotational accuracy.
• Reliable and long-lasting as proven by the
  thousands in use around the world.
• There is no vertical spindle above the bench as
  in a traditional scaif. An open top bench is more convenient.
• The shaft and drive rotor is dynamically
  balanced to gyroscopic levels of accuracy.
• Sealed for life to give many years service.
• No belts used – so eliminating vibration from
  this source.
• Electricity supply required – 3 phase, voltage
  and frequency as requested.