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MSF100 is a semi‑automatic, multifunctional raceway superfinishing machine engineered for medium‑to‑large bearing rings. It supports inner ring bore diameters from Ø220 to Ø800 mm and bearing outer diameters up to Ø100 mm, enabling one machine to handle multiple bearing models with fast changeover.
With high‑accuracy workholding, proportional stone pressure control, and automatic stone wear compensation, the MSF100 delivers consistent ultra‑smooth raceway finishes for demanding OEM noise, friction, and durability requirements.
One‑station 3‑pass superfinishing cycle for stable quality
Proportional valve controls stone pressure for repeatable results
Siemens 828D CNC + inverter control for speed & oscillation tuning
Automatic stone wear compensation + low‑stone alarm
Gentle pneumatic loading/unloading to protect the ring OD
MSF100 is designed for superfinishing bearing raceways on a wide range of ring types, including:
Deep groove ball bearing inner and outer rings
Four‑point contact ball bearing inner and outer ring grooves
Tapered roller bearing raceways
Cylindrical roller bearing raceways
This all‑in‑one capability makes the MSF100 suitable for production environments with small batch sizes and multiple models, where process stability and fast setup are critical.
To achieve stable rotation and high surface consistency, the MSF100 adopts dedicated clamping methods for different rings:
Inner ring: centered by the bore and compressed on the end face, ensuring accurate positioning and repeatable rotation.
Outer ring: supported centerless on the outer diameter and compressed on the end face, reducing deformation risk and improving rotational accuracy.
This workholding approach minimizes runout influence during superfinishing and helps produce uniform raceway textures and consistent contact conditions.
Each workpiece completes a complete superfinishing cycle on a single workstation. The machine performs three rounds (passes) of finishing, with three pressurization stages for rough/medium/fine control.
Stone pressure is controlled by a proportional valve, allowing operators to tune the process window for different bearing geometries and material conditions. Automatic compensation for stone wear helps keep process results stable over time while reducing manual intervention.
Below are the key specifications for the MSF100 superfinishing machine. For special bearing types, stones, and fixtures, contact us with your ring drawing for a process proposal.
Multi-functional raceway superfinishing machine | |
Technical Specifications | |
TYPE | MSF1000 |
Outer diameter of workpiece (mm) | ф270~ф1000 |
Inner ring bore diameter (mm) | ф220~ф800mm |
Workpiece width | 18~400mm |
Number of spindle heads | 1 |
Groove angle | ±40° |
Raceway angle | ±30° |
Workpiece spindle speed | 200~2000 r/min Stepless speed regulation |
Oscillation frequency | 55-550 stepless speed regulation |
Oscillation angle | 0~±20° |
Air pressure | 0.1-0.4 MPa |
Total power of the machine tool | 23KW |
Machine Size (mm) | 4400*3500*2750 |
Working efficiency | 10~300s / PCS |
Machine weight | 16000KG |
1) Consistent finish quality
Proportional valve stone pressure control for repeatable surface results
One‑station 3‑pass cycle reduces handling variation
Automatic wear compensation + low‑stone alarm
2) Higher efficiency with safer handling
Pneumatic rotation loading/unloading and cylinder pushing/discharging
Designed to avoid damaging the workpiece's outer diameter during transfer
3) Stable control & parameter management
Siemens 828D CNC system with touch‑screen parameter setup
Frequency inverter control for stepless spindle speed and oscillation tuning
Oil‑mist lubrication for workpiece spindle reliability
What is a superfinishing machine used for in bearing manufacturing?
A superfinishing machine improves bearing raceway surface texture and reduces friction by controlled stone contact under oscillation, helping meet noise and life requirements.
Is "super finishing machine" the same as "superfinishing machine"?
Yes. "Super finishing", "superfinishing," and "superfinish" are common naming variants used by different buyers and regions.
Can MSF100 finish both inner rings and outer rings?
Yes. It supports dedicated clamping methods for inner and outer rings to ensure stable rotation and repeatable finishing.
Which bearing types can this superfinish machine handle?
Deep groove ball, four‑point contact ball, tapered roller, and cylindrical roller bearing rings.
How does proportional valve stone pressure control improve consistency?
It enables precise, repeatable pressure stages across rough/medium/fine passes, reducing operator dependency and improving batch stability.
Does the machine compensate for stone wear automatically?
Yes. It provides automatic wear compensation and alarms when the stone becomes too short.
What is the difference between microfinishing and superfinishing?
They are often used interchangeably in bearing applications; both refer to ultra‑fine finishing processes that refine surface texture after grinding.
What information is needed for a quotation and cycle time estimate?
Bearing ring drawing (OD/ID/width), raceway angle, material/heat treatment, target surface requirement, and current pre‑finish condition.
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