M328 – Automatic Tool Change (ATC) – Light Industrial

The M328 automatic toolchange is a high stiffness precision machining spindle with a maximum speed of 125,000rpm, fitted with an interchangeable high torque automatic collet system. Collet sizes from 3mm to 6mm diameter are available. With a powerful AC motor, front thrust bearing system and high stiffness radial bearings, it is ideal for the precision machining of non-ferrous materials and composites, and is designed for use in specialised, multi-spindle CNC machine tools.

Specifications of M328 spindle

Speed range 10,000rpm - 125,000rpm
Motor power (max)750 Watts (peak), 500 Watts (cont.)
Automatic tooling systemPnuematic, with interchangeable collets
Collet sizes1/8”, 3, 4 and 6mm shank dia.
Bearing air supply pressure5.6 kg/cm*2
Bearing air consumption65 nl/min
Coolant flowrate1.5 l/min (water) or 3 l/min (oil)
Heat dissipation to coolant (max)640 Watts
Axial failure load (push)250 N
Radial failure load at collet80 N (static)
Collet torque (max)3.4 Nm with 1/8” bore collet
Dynamic runout at tool7 microns
Motor type3 phase, 2 pole AC
Speed sensor (tacho) - optionalTTL signal
Weight (approx)4.7 Kg

M321 – Manual Collet – Light Industrial spindle

Light Routing Spindle with Manual Tool Change

The M321 manual toolchange is a robust precision machining spindle with a maximum speed of 100,000rpm, fitted with an interchangeable manual collet system. Collet sizes from 3mm to 6mm diameter are available. With a powerful AC motor and front thrust bearing system, it is ideal for composite material routing and micro-machining of non-ferrous materials.

Specifications of M321 Manual Light Industrial spindle

Speed range 10,000rpm - 100,000rpm
Motor power (max)750 Watts
Tooling systemRemoveable nut with interchangeable collets
Collet sizes1/8”, 3, 4 and 6mm shank dia.
Bearing air supply pressure5.6 kg/cm*2
Bearing air consumption85 nl/min
Coolant flowrate1.5 l/min (water) or 3 l/min (oil)
Heat dissipation to coolant (max)640 Watts
Axial failure load (push)200 N
Collet torque (max)4 Nm with 6mm bore collet
2 Nm with 1/8” bore collet
Dynamic runout at tool7 microns
Motor type3 phase, 2 pole AC
Speed sensor (tacho) - optionalTTL signal
Weight (approx)4 Kg

M321 – Automatic Tool Change (ATC) – Light Industrial spindle

Light Routing Spindle with Automatic Tool Change

The M321 automatic toolchange is a robust precision machining spindle with a maximum speed of 125,000rpm, fitted with an interchangeable automatic collet system. Collet sizes from 3mm to 6mm diameter are available. With a powerful AC motor and front thrust bearing system, it is ideal for glass grinding, and micro-machining of non-ferrous materials, and is designed for use in specialised, multi-spindle CNC machine tools.

Specifications of M321 ATC spindle

Speed range 10,000rpm - 125,000rpm
Motor power (max)750 Watts
Automatic tooling systemPnuematic, with interchangeable collets
Collet sizes1/8”, 3, 4 and 6mm shank dia.
Bearing air supply pressure5.6 kg/cm*2
Bearing air consumption85 nl/min
Coolant flowrate1.5 l/min (water) or 3 l/min (oil)
Heat dissipation to coolant (max)640 Watts
Axial failure load (push)200 N
Collet torque (max)4 Nm with 6mm bore collet
2 Nm with 1/8” bore collet
Dynamic runout at tool7 microns
Motor type3 phase, 2 pole AC
Speed sensor (tacho) - optionalTTL signal
Weight (approx)4 Kg

D1091 – Manual Collet – Light machining spindle

The D1091 is a small air turbine-driven spindle for light machining duties, with a maximum speed of 100,000rpm. It is fitted with a manual collet system, with sizes from 0.5mm to 5mm diameter available. Due to its compact size and air-cooled body, installation into any precision machine tool is simple. An optional speed sensor can be supplied for accurate turbine speed feedback.

Specifications of D1091 spindle

Max. operating speed100,000 rpm
Turbine air consumption113 nl/min
Turbine air pressure (max)5.6 kg/cm*2
Bearing air consumption39.6 nl/min
Bearing air pressure5.6 kg/cm*2
Collet diameter range0.5 - 5mm
Collet tool runout - max0.01mm
Radial failure load at collet face35 N @ 100,000 rpm
Axial failure load - push75 N
Body diameter41.3 mm
Approx. weight1.1 Kg

FAQs

Have a question about the Air Bearing Spindles product range? Here we answer a selection of frequently asked questions.

If your question doesn’t appear, please get in touch with one of our experts.

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The Westwind product line spare parts are manufactured to the same high quality and tolerances as our spindles (Westwind product line is ISO 9001:2015 registered). Our manufactured collets are specifically designed to operate at the high rotational speeds and dynamic run-out accuracy demanded by our customers. Alternative components cannot only reduce the life of the spindle, but may also affect product quality and output. Experience has shown that by fitting only genuine Westwind replacement parts, the high productivity, consistent accuracy, and outstanding operating characteristics can be maintained.

It is likely that contamination over a period of time has prevented the shaft from floating freely. We strongly recommend the unit be returned to your local Westwind product service centre for investigation.

This should be carried out at intervals recommended by the machine manufacturer. You are strongly advised to refer to the appropriate Westwind collet maintenance booklet (available free on request), and to use the Westwind collet maintenance kit available through your machine supplier. However, as a general rule we would recommend a maximum of 5,000 hours between removal/cleaning/re-setting, although some end users maintain their collets every 100 hours.

Westwind recommend the use of distilled water with the addition of chemical agents to prevent algae or bacterial growth. Each spindle needs an uninterrupted flow at between 16-20ºC. Many spindles used in production are fitted with temperature sensors that shut the machine down before damage is done.

By clean air we mean the supply should be filtered to better than 0.01 microns and 99.99% free from oil and water as a liquid or vapour with a PDP (Pressure Dew Point) @ 7°C. Westwind are able to supply suitable filter units. Please note that in all cases we strongly recommend that the compressor system is backed up by a reservoir tank to maintain a steady pressure and to minimise the effects of an air failure.