Positorq 2A Conversion from 6mm to 9mm Discs
The TSP P2XL conversion upgrades Positorq 2A friction units from 6mm working discs to standard 9mm discs. Developed for Rieter Scragg and compatible Himson machines, the conversion retains the original spindles, mounting assemblies and complete Positorq drive system.
The upgrade supports longer PU disc life, lower spindle speeds and more consistent yarn processing, with the potential to improve yarn quality and production efficiency.
Key Benefits of the Disc Conversion
Standard Disc Sizes
Uses 52.0mm or 52.5mm diameter working discs with a thickness of 9mm.
Longer PU Disc Life
The 9mm disc configuration offers longer working life than the original 6mm system, helping reduce replacement frequency.
Lower Spindle Speed
Reduced spindle RPM supports smoother operation and lower mechanical wear.
Bearing Service Life
Lower spindle speeds can extend bearing life and reduce maintenance requirements.
Processing Speed
Potential to increase production speed and process efficiency while maintaining the required yarn properties.
Yarn Quality and Consistency
Optimised twist generation supports yarn tensile properties, crimp structure and uniformity.
Disc Sourcing and Inventory
Standard 9mm discs simplify sourcing, reduce the range of spare disc sizes required and support production of yarns made on other 9mm disc systems.
150 Denier Polyester Twist Level Comparison
Compare friction units by disc diameter and yarn twist level. TSP P2XL with 52.0mm discs is highlighted in blue.
| Ref. | Friction Unit | Disc Diameter | Twist (TPM) |
|---|---|---|---|
| 1 | Rieter Scragg P2 | 46.0mm | 2,195 |
| 2 | Rieter Scragg P2 | 47.0mm | 2,065 |
| 3 | TSP P2XL | 52.0mm | 2,225 |
| 4 | Rieter Scragg P5 | 52.0mm | 2,175 |
| 5 | Rieter Scragg P6 | 56.0mm | 2,210 |
| 6 | Barmag Type 8F | 52.0mm | 2,280 |
| 7 | Barmag Type 8E | 52.0mm | 2,210 |
| 8 | Rieter ICBT Motor Drive | 52.0mm | 2,125 |
| 9 | TMT Motor Drive | 58.0mm | 2,265 |
| 10 | Aalidhra Atech | 54.1mm | 2,185 |
| 11 | Aalidhra Atech | 54.4mm | 2,130 |
| 12 | Himson VX2 | 58.0mm | 2,260 |
Conversion Design and Retained Components
Original Spindles
The conversion retains the original spindles and mounting assemblies to keep the upgrade cost down.
Positorq Drive System
The complete existing Positorq drive system is retained.
Existing Unit Components
The design reuses the majority of the Positorq 2A friction unit components.
Mechanical Stability
The established mounting and drive arrangement is preserved while adapting the working disc configuration.
Machine Compatibility
Rieter Scragg
Machines fitted with Positorq 2A friction units using 6mm working discs.
Himson SDS700
Applicable where the machine uses the same friction unit design as Positorq 2A and is currently equipped with 6mm discs.
Himson CX Series
Applicable to compatible Positorq 2A type friction units operating with 6mm discs.
TSP reviews the existing unit configuration to confirm suitability before specifying the conversion.
Process Performance
The P2XL arrangement is designed to optimise twist generation for both processing speed and product quality. Disc selection and process settings are matched to the yarn to support consistent tensile properties, crimp characteristics and stable production.
Achievable improvements in speed, disc life and yarn properties depend on the machine condition, yarn and operating settings.
TSP Conversion Support
Configuration Assessment
Review of the machine, existing friction units, production targets and upgrade requirements.
Disc Selection
Guidance on disc dimensions, configuration and process optimisation for the intended yarn.
Installation and Commissioning
Support from installation through commissioning, followed by process optimisation after the upgrade.
Machine Integration
Adapt the upgrade to the existing machine’s layout and interfaces.
Process Stability
Match the configuration to the required yarn and production conditions.
Technical Support
Practical support for specification, installation and process trials.