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For 2026, the variable-speed Colchester Student VS and Harrison V300 centre lathes are available with Constant Surface Speed functionality. CSS automatically adjusts spindle speed as the workpiece diameter changes, helping operators maintain the correct cutting speed throughout a turning operation.
On a conventional fixed-speed setting, the actual surface speed changes depending on the diameter being machined. This can lead to inefficient cutting, inconsistent finishes or unnecessary tool wear. With CSS active, the lathe increases or decreases spindle RPM automatically to maintain the selected surface speed, which is particularly useful during facing, tapering and work involving changing diameters.
The result is a more consistent surface finish, improved tool life and less need for the operator to make repeated manual speed adjustments. It also makes the technology particularly useful in education and training, where learners can concentrate on understanding machining principles while the machine manages the spindle speed calculation.
The Student VS and V300 platform offers a 330mm swing over the bed, 635mm or 1000mm distance between centres, a 40mm spindle bore and a spindle speed range of 30 to 3000rpm. The machines combine rigid construction with variable-speed control, making them suitable for training workshops, toolrooms, prototyping and small-batch production.
For professional workshops, CSS can help improve repeatability and save time on one-off and low-volume work. For training environments, it provides a practical introduction to a feature widely used in modern machining.
Contact RK International to discuss the Colchester Student VS or Harrison V300 and configure a machine to suit your workshop or training requirements.
On a conventional fixed-speed setting, the actual surface speed changes depending on the diameter being machined. This can lead to inefficient cutting, inconsistent finishes or unnecessary tool wear. With CSS active, the lathe increases or decreases spindle RPM automatically to maintain the selected surface speed, which is particularly useful during facing, tapering and work involving changing diameters.
The result is a more consistent surface finish, improved tool life and less need for the operator to make repeated manual speed adjustments. It also makes the technology particularly useful in education and training, where learners can concentrate on understanding machining principles while the machine manages the spindle speed calculation.
The Student VS and V300 platform offers a 330mm swing over the bed, 635mm or 1000mm distance between centres, a 40mm spindle bore and a spindle speed range of 30 to 3000rpm. The machines combine rigid construction with variable-speed control, making them suitable for training workshops, toolrooms, prototyping and small-batch production.
For professional workshops, CSS can help improve repeatability and save time on one-off and low-volume work. For training environments, it provides a practical introduction to a feature widely used in modern machining.
Contact RK International to discuss the Colchester Student VS or Harrison V300 and configure a machine to suit your workshop or training requirements.
For more information on New for 2026: Achieve Perfect Finishes with Constant Surface Speed on the Colchester Student VS / Harrison V300 talk to RK International Machine Tools
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