SPENO RR 48 M Rail Grinding Train
The SPENO RR 48 M is a 48-stone production rail grinding train for high-speed and main lines. Published data lists 48 water-cooled 22 kW grinding motors, 100 km/h travel speed and LPM–TPM measurement. It supports preventive cycles through heavy corrective grinding, subject to the customer-specific vehicle configuration.
Last source review: 17 September 2026 · Machine specifications are indicative and configuration-dependent
What is the SPENO RR 48 M?
The RR 48 M is a high-output conventional rail grinding train in SPENO International’s RR machine family. SPENO lists RR 48 M machines both in its contracting fleet and among machines offered for sale. Yardway describes the model as suited to high-speed lines, main lines, open track and level crossings.
Its operating range spans light cyclical intervention, preventive reprofiling and heavy corrective grinding. Forty-eight independently powered grinding positions provide the installed grinding capacity, while onboard measurement supports profile control and work verification.
Configuration note: SPENO machines are customised for the customer and network. Treat the values on this page as a published reference configuration, not a universal build specification.
SPENO RR 48 M specifications
Are RR 48 M, RR48M and RR-48 the same model family?
These spellings are commonly used for the same SPENO 48-stone machine family. SPENO writes the designation as RR 48 M; Yardway uses both RR 48 M and RR-48; condensed references often use RR48M. Keep the machine suffix when it is known because individual builds are not automatically identical.
SPENO’s current machine list identifies contracting-fleet variants RR 48 M-2, M-3, M-4, M-5, M-7 and M-8. The list also includes RR 48 M among machines offered for sale. This page describes the family and the Yardway reference configuration, not every numbered variant.
Why this matters: verify the full designation, fleet number and build documents before using dimensions, operating limits or grinding-wheel information for procurement.
Where is the RR 48 M used?
Production reprofiling where accuracy, measurement and repeatable output are required.
Preventive grinding cycles and corrective removal across open-track sections.
Published as one of the rail-profile and track environments supported by the machine.
From cyclical maintenance passes to heavier corrective grinding, depending on the work plan.
Grinding, measurement and protection systems
Water-cooled motors
Each of the 48 grinding positions is listed with a 22 kW water-cooled electric motor.
Profile measurement
The published configuration identifies LPM–TPM measurement and real-time rail cross-section display.
Spark management
Water-cooled spark deflectors and a high-pressure water system support operation around the grinding zone.
Dust collection
The source identifies an efficient collection system intended to reduce airborne grinding debris.
SPENO RR 48 M grinding wheel: 250 × 78 × 150 mm
The wheel selected for this page has a 250 mm outside diameter, 78 mm thickness and 150 mm bore. Its product page lists a maximum operating speed of 50 m/s and general use on SPENO rail grinders. That public product page does not identify every RR 48 M variant by suffix, so the machine-specific approval remains a required check.
- Outside diameter
- 250 mm
- Thickness
- 78 mm
- Inner diameter
- 150 mm
- Maximum speed
- 50 m/s
Compatibility check required: RR 48 M vehicles are customer-specific. Confirm the grinding-unit version, wheel drawing, bore and flange arrangement, approved speed, abrasive specification and operator approval before procurement or installation.
What should buyers confirm before ordering?
SPENO RR 48 M FAQ
What is the SPENO RR 48 M?
It is a 48-stone production rail grinding train intended primarily for high-speed and main-line reprofiling.
How many grinding stones does the RR 48 M use?
The published reference configuration uses 48 grinding stones and 48 water-cooled 22 kW grinding motors.
What is the maximum travel speed?
Yardway lists a maximum travel speed of 100 km/h for the published configuration.
Can the RR 48 M perform corrective grinding?
Yes. The source describes work from light cyclical intervention through heavy corrective grinding.
What measurement system is listed?
The published specification identifies LPM–TPM measurement and mentions real-time display of rail cross-section.
What grinding wheel is referenced for this page?
The referenced product is 250 × 78 × 150 mm with a published maximum speed of 50 m/s. Confirm the exact machine and mounting configuration before ordering.
Are RR 48 M, RR48M and RR-48 the same designation?
They are common spellings for the same model family. Use the complete suffix or fleet number when confirming an individual machine.
Are all RR 48 M machines identical?
No. SPENO vehicles are customised to customer requirements, so dimensions, systems and consumable approval can vary.
Sources and review method
- Yardway RR‑48 product page — model description and indicative technical data.
- SPENO International machine range — manufacturer confirmation of RR 48 M variants and operating environments.
- 250 × 78 × 150 mm SPENO grinding wheel — wheel dimensions and published maximum operating speed.
Editorial review: 17 September 2026. Machine values are reported as source-specific reference data; wheel compatibility remains subject to configuration verification.