JOKE Polierbock UVM Polishing & Precision Lathes
Polierbock UVM machines are industrial polishing and precision-lathe systems for accurate finishing of individual components and production work. Their robust, compact construction, powerful low-speed performance and modular design support processes ranging from polishing and grinding to filing, deburring, brushing, chamfering and coating.
Every Polierbock is built around the component, finishing process and working environment. Junior and Regatron form the principal drive systems and provide the foundation for Praktika and Mechanika configurations. Ergonom is a separate variable-speed system for larger and heavier components, while special machines extend the range through application-specific workholding, controls and protective equipment.
Use this guide to compare the available systems and identify the information required for an accurate machine recommendation and quotation.
Processes and Applications
Polierbock systems cover a wide range of shaping and surface-finishing operations on workpieces both large and small, from one-off components to repeat production.
- Polishing
- Grinding and sanding
- Filing and scraping
- Deburring
- Brushing
- Chamfering and rounding
- Wrapping and coiling
- Cutting
- Coating
- Processing shafts and spindles
- Processing axles and tube sections
- Application-specific special processes
The machine specification is determined by the workpiece dimensions and weight, operating-speed requirement, support or clamping method, processing tool, direction of rotation, protective equipment and required level of operator control.
Choose Your Polierbock System
The Polierbock range is built around two principal drive systems:
- Junior provides three selectable operating speeds.
- Regatron provides continuously variable speed control.
These machines operate as standalone systems or form the drive platform for Praktika and Mechanika configurations.
| System | Machine architecture | Best suited to |
|---|---|---|
| Junior | Compact base machine with three selectable speed settings | Repeatable processes using defined operating speeds |
| Regatron | Compact base machine with continuously variable speed control | Processes requiring precise and flexible speed adjustment |
| Praktika | Junior or Regatron drive system with a baseplate and tailstock | Supported processing of shafts, spindles, axles and tube sections |
| Mechanika | Junior or Regatron drive system with a baseplate and precision cross-support | Controlled tool positioning and work that would otherwise occupy a larger precision lathe |
| Ergonom | Separate variable-speed machine system for substantial workpieces | Ergonomic processing of larger and heavier components |
| Special machine | Individually engineered Polierbock arrangement | Processes requiring bespoke workholding, guarding, controls or workplace integration |
System selection at a glance
Select Junior for three defined speeds or Regatron for continuously variable control.
Add a Praktika tailstock for supported workpieces, a Mechanika cross-support for controlled tool positioning, or specify Ergonom for larger and heavier components.
Special machines extend the system beyond these standard architectures.
All Polierbock systems are supplied by quotation.
The model name establishes the machine architecture, but not the complete price.
The final quotation includes the selected drive, platform, speed configuration, workholding, controls, protective equipment and installation options.
Junior & Regatron Base Machines
Junior and Regatron form the drive platform at the heart of the Polierbock system. The standard electrical supply is 400 V and both machines include a highly effective electromagnetic brake and transparent protective hood. Both are available as the compact PB 2 or the larger, higher-output PB 3.
Selection follows three steps:
- Speed-control type
- Machine platform
- Operating-speed range
Junior – Three Selectable Speed Settings
Junior provides three switch-selectable speeds for consistent, repeatable processing and operates clockwise as standard; clockwise/anticlockwise switching is available as an option.
Select the speed group that covers the required operating range, then choose the PB 2 or PB 3 platform.
- PB 2 is the compact Junior platform with a 173 mm centre height.
- PB 3 increases the machine dimensions, centre height and motor output for larger or more demanding work.
Speed Group
| Junior speed group | Selectable speeds | Speed range |
|---|---|---|
| Group 1 | 450 / 700 / 1,400 rpm | Includes the lowest Junior setting at 450 rpm |
| Group 2 | 950 / 700 / 1,400 rpm | Substitutes a 950 rpm setting for the 450 rpm setting |
| Group 3 | 700 / 1,400 / 2,800 rpm | Extends the upper operating speed to 2,800 rpm |
Platform
| Specification | Junior PB 2 | Junior PB 3 |
|---|---|---|
| Dimensions | 280 x 225 x 285 mm | 330 x 280 x 340 mm |
| Centre height | 173 mm | 200 mm |
| Motor output | 0.2 / 0.5 / 0.6 kW | 1.1 / 1.9 / 2.4 kW |
Regatron – Continuously Variable Speed Control
Regatron provides continuously variable speed adjustment through modern power electronics and includes clockwise/anticlockwise rotation as standard. It is the appropriate drive system for work that requires precise speed setting or frequent adjustment between components, materials, tooling diameters or finishing stages.
Speed Range
| Speed-range option | Continuously variable range | Range distinction |
|---|---|---|
| Lower-speed range | 50–2,000 rpm | Extends down to 50 rpm |
| Higher-speed range | 300–4,000 rpm | Extends up to 4,000 rpm |
Platform
| Specification | Regatron PB 2 | Regatron PB 3 |
|---|---|---|
| Dimensions | 280 x 225 x 285 mm | 330 x 280 x 340 mm |
| Centre height | 173 mm | 200 mm |
| Maximum output | 2.2 kW | 4.0 kW |
Junior or Regatron?
Junior is the defined-speed system for repeatable production.
Regatron is the continuously variable system for processes requiring greater speed control and flexibility.
The same drive-system choice carries through to Praktika and Mechanika.
Praktika & Mechanika Configurations
Praktika and Mechanika extend the Junior or Regatron drive system with dedicated workholding or tool-positioning equipment. The required speed-control type and PB platform remain integral to the finished machine.
Praktika – Baseplate and Tailstock
Praktika combines a Junior three-speed or Regatron variable-speed drive with a baseplate and tailstock. The tailstock supports shafts, spindles, axles and tube sections throughout polishing, grinding, deburring and related finishing operations.
Three Selectable Speed Configurations
| Platform | Selectable speed configurations | Motor output |
|---|---|---|
| PB 2 | 450 / 700 / 1,400 rpm or 700 / 1,400 / 2,800 rpm |
0.2 / 0.5 / 0.6 kW |
| PB 3 | 950 / 700 / 1,400 rpm or 700 / 1,400 / 2,800 rpm |
1.1 / 1.9 / 2.4 kW |
Continuously Variable Speed Control
| Platform | Speed range | Maximum output |
|---|---|---|
| PB 2 | 50–2,000 rpm | 2.2 kW |
| PB 3 | 50–2,000 rpm | 4.0 kW |
Mechanika – Baseplate and Cross-Support
Mechanika combines a Junior or Regatron drive with a baseplate and precision cross-support. This compact-lathe architecture positions the processing tool accurately and transfers suitable finishing work away from cost-intensive general-purpose lathes.
Mechanika Configurations
| Specification | Three-speed Mechanika | Variable-speed Mechanika |
|---|---|---|
| Platform | PB 2 | PB 2 |
| Operating speed | 450 / 700 / 1,400 rpm | 50–4,000 rpm |
| Motor output | 0.2 / 0.5 / 0.6 kW | Maximum 4.0 kW |
Mechanika is available with a suction unit, optional base frame and alternative table lengths. Workholding, cross-support, extraction and installation requirements form part of the ordered machine specification.
Ergonom & Special Machines
Ergonom – Larger and Heavier Workpieces
Ergonom is the separate variable-speed Polierbock system for larger and heavier components. Its architecture provides ergonomic access to substantial workpieces and is specified around their handling, support, drive and accessibility requirements.
The complete Ergonom specification covers the variable-speed drive, chuck or workholding arrangement, guarding, operator controls and workshop installation.
Customised Special Machines
Special machines extend the modular Polierbock system beyond the standard Junior, Regatron, Praktika, Mechanika and Ergonom arrangements. JOKE engineers the drive, workholding, protection and controls around the required process.
Established special-machine configurations include:
- Junior three-jaw chucks on both sides with different diameter ranges
- Regatron rapid chucks with protective housing, contact protection and an extraction connection
- Praktika-based systems for partial carbide coating, lacquering or applying protective films
- Rapid clamping devices with internal and external clamping
Moleroda and JOKE use the component, process and working method to define the correct standard platform or special-machine architecture.
Workholding, Controls & Workshop Configuration
A complete Polierbock specification includes the drive system, workholding, guarding, operator controls and workplace equipment.
Accessory pricing:
Chucks, collets, foot controls, protective equipment, bases, extraction arrangements and other options are priced as part of the complete machine quotation. Several options must be incorporated during manufacture and cannot be added retrospectively.
Workholding Options
- Cast-iron or steel three-jaw chucks with mounting flange; Röhm steel optional
- Diameters from Ø80–315 mm
- Optional bayonet lock for faster changes
- Rapid chucks for pressure collets
- Collet ranges covering Ø3–42 mm or Ø4–62 mm
- Shaft with MK3 or MK4 Morse taper
- Internal and external rapid-clamping arrangements
- Tailstock or precision cross-support
Controls and Workplace Options
- Optional foot switch: press and hold to operate; release to stop
- Upgrade to foot switch with pressure-point safety stop and manual reset
- Clockwise/anticlockwise rotation
- Machine base measuring 390 × 540 × 800 mm with storage drawer
- Alternative table lengths available
- Suction and extraction arrangements
- Special lacquering in a selected RAL colour
- Ergonomic and accessible workplace design
Protective Hoods and Chuck Guards
- Impact-resistant transparent protective hoods match the selected chuck size, retaining visibility while helping to protect against contact, chips and flying sparks.
- Plastic protective washers are available for three-jaw chucks from Ø100–315 mm.
Electrical Supply
Junior and Regatron use a 400 V standard electrical supply, with alternative supplies from 230–480 V available and adaptation for international installations. Site voltage and frequency form part of the confirmed order specification.
Machine Safety & Controlled Stopping
Polierbock machines combine controlled stopping, motor protection and application-specific guarding for professional workshop use.
- Highly effective electromagnetic brake: reduces spindle run-down after the stop control is activated
- Emergency-stop control: initiates rapid machine shutdown
- Safety foot-switch option: adds a pressure-point emergency stop with manual reset
- Transparent protective hoods: match the chuck size and protect against contact, chips and flying sparks
- Thermal motor monitoring: automatically cuts off the motor at the temperature limit
- Class F insulation: supports dependable industrial operation
The machine safety specification is matched to the selected chuck, workholding and process. These protective measures support a controlled installation; employers remain responsible for guarding, risk assessment, operator training and the safe system of work surrounding the complete machine.
For further guidance, read
Using Emery Cloth on a Lathe Safely: HSE Guidance, PUWER and Controlled Stopping
Request a Polierbock Recommendation & Quotation
Every Polierbock is individually specified and quoted. Provide the following application information so Moleroda and JOKE can define the drive system, platform, operating speed, workholding, controls, protective equipment and workshop installation.
- Required process or finishing operation
- Workpiece material
- Workpiece dimensions and weight
- One-off, batch or production use
- Required or currently used operating speed
- Three-speed or continuously variable control
- Required direction of rotation
- Required clamping or support method
- Processing tool or abrasive
- Guarding and extraction requirements
- Foot-control requirements
- Available electrical supply
- Bench, base frame or complete workstation
- Drawings, photographs or sample components
Application details establish whether Junior, Regatron, Praktika, Mechanika, Ergonom or a customised special machine provides the correct foundation. Moleroda then supplies a configuration-specific quotation covering the complete machine.
Brochure pricing:
The JOKE brochure is provided as a technical and configuration reference.
Any supplier prices shown do not constitute a current Moleroda quotation and may not include the complete machine configuration, UK delivery, applicable taxes or other supply costs.