Rail cutting disc selection starts with the rail saw and the rail specification. FUJI offers 305mm and 355mm reinforced resin cutting discs for suitable petrol rail-cutting machines. The specified rail series uses three layers of reinforcing mesh and a maximum peripheral-speed rating of 100m/s. A 405mm disc requires separate custom production.
This guide helps maintenance buyers and workshop teams prepare a correct specification and compare trial results. It does not replace the railway operator's approved cutting procedure, track-access controls or the saw manufacturer's instructions.
| Disc diameter | Supply discussion | Compatibility check |
|---|---|---|
| 305mm / nominal 12-inch | FUJI rail cutting specification | Exact saw capacity, bore, thickness and marked maximum RPM |
| 355mm / nominal 14-inch | FUJI rail cutting specification | Do not assume equivalence with a 350mm machine specification |
| 405mm / nominal 16-inch | Custom production; confirm order conditions and lead time | Confirm the complete specification and approved machine before ordering |
Diameter alone is insufficient. Send the saw make and model, nameplate speed, approved blade dimensions and bore, together with the rail grade and profile. Do not enlarge a bore, improvise mounting parts or fit a larger disc to increase cutting depth.
See the FUJI large-diameter cut-off wheel range, then confirm which exact product is approved for the proposed rail-cutting application. A general metal chop-saw wheel is not automatically suitable for a high-speed petrol rail saw.
Portable rail cutting application; select the disc against the actual saw specification.
Peripheral speed describes how fast the outer edge of the disc travels. At the same rotational speed, a larger disc has a higher peripheral speed. This is why a speed rating cannot be transferred from one diameter to another without checking the label.
The relation is v = π × D × n ÷ 60, where v is m/s, D is diameter in metres and n is RPM. This explains the units; it is not permission to change machine speed or to exceed the disc's printed limit. Always use the marked maximum RPM and approved saw configuration.
Specify the rail steel grade, profile and whether the work includes a special crossing or other component. Do not treat all railway metal as the same material or assume every component is manganese steel. The abrasive recommendation and any trial must reflect the actual material.
This page concerns cutting steel rail. Concrete sleepers, masonry and other construction materials require their own approved cutting products. Likewise, approval for a petrol saw should not be extended automatically to hydraulic, automated or stationary equipment.
The three-layer mesh construction is part of the FUJI rail disc specification. It does not make a wheel unbreakable or authorize lateral loading. Cutting-only discs must not be used to grind a rail end with their side, and operators must not twist a disc in the kerf.
Before mounting, check appearance, label, damage, bore and mounting surfaces. Reject damaged discs and follow the manufacturer's storage and shelf-life instructions. Confirm that the guard, flanges and rail attachment are correct for the saw. Keep discs protected from impact and unsuitable moisture during transport to site.
Rail replacement, repair preparation and installation may all involve cutting to length, but each has its own engineering and access requirements. Rail movement and stored stresses must be managed by the responsible railway team. A cutting-disc supplier cannot determine the safe sequence for a particular track condition.
Check that the machine can reach and complete the required cut in its approved configuration. Provide the workpiece support and rail-saw attachment specified by the procedure. Use the manufacturer's operating method rather than forcing the disc to compensate for unsuitable positioning.
A useful disc trial records the rail grade and profile, saw model, disc specification and the agreed acceptance standard. Compare the time to complete an accepted cut, disc consumption and any rework. Include setup and disc-change time when estimating the impact on a maintenance window.
A fast cut that needs correction is not necessarily the lowest-cost result. Compare total cost per accepted cut: disc consumption, operator time, changeover and rework. No fixed cutting-time or wheel-life improvement is claimed here without a documented comparison.
Cutting a rail and grinding a repair weld are different operations. After welding, a suitable Super Z zirconia grinding wheel can be evaluated for efficient local weld material removal with the FUJI HGP-4260 high-frequency angle grinder. Select the approved 180mm wheel specification and verify the material, speed, guard and mounting arrangement.
The approximately 3kg HGP-4260 is intended to make movement between maintenance positions easier. It requires a matched 200V, 400Hz HFD Driver (High-Frequency Drive / Inverter); the driver's input supply must be checked separately. This electronic supply differs from traditional 250Hz and 300Hz motor-generator systems. The matched system includes braking for quicker stopping, but the operator must wait for rotation to stop before setting the tool down.
Super Z's zirconia abrasive is an option for improving removal efficiency compared with an unsuitable or less effective wheel. Compare accepted weld-cleanup time, wear and required finishing on the actual rail grade. No universal percentage improvement applies to all repair conditions.
Use within rated duty. HGP-4260 suits mobile, intermittent maintenance tasks; prolonged overloaded grinding can substantially shorten machine life. It is not an unrestricted heavy-grinding replacement. Follow the railway's repair instructions for removal allowance and inspection. Local angle-grinder work does not replace required rail-profile grinding, geometry checks or approval for return to service.
See the HGP-4260 mobile maintenance application for its supply and duty limits. Never use a 305mm or 355mm rail cutting disc on this 180mm angle grinder.
For a product-focused overview of the 305mm and 355mm range, see FUJI rail cutting discs for petrol rail saws. This selection guide concentrates on procurement details and trial acceptance so the two articles serve different needs.
The rail cutting range discussed here uses 305mm and 355mm discs. A 405mm version requires separate custom production and confirmation of the full specification, order conditions and lead time.
No. The 100m/s rating is maximum peripheral speed. RPM is rotational speed and depends on diameter. Use the maximum RPM marked on the supplied disc and confirm it against the rail saw specification.
Do not assume so. Nominal sizes that look similar are not automatically interchangeable. The saw manufacturer must approve the exact diameter, bore, thickness, wheel type and speed rating.
This application concerns steel rail cutting. Concrete sleepers require a different approved blade and process; do not use a metal rail disc merely because its diameter fits.
No. Reinforcement does not authorize twisting or side grinding with a cutting-only wheel. Follow the wheel and saw instructions and the rail operator’s approved work method.
Send the saw model, maximum speed, approved disc diameter and bore, rail grade and profile, destination, expected consumption and required delivery date. For 405mm, state that custom production is needed. FUJI will confirm the available specification, documentation and supply conditions before an order is agreed.
