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  • MA100033.001
Centerless grinding machine  model RPS 376 Characteristics of the centerless...daha fazla bilgi

Centerless grinding machine  model RPS 376

Characteristics of the centerless grinding machine model RPS 376

  • Diameter Range 10 - 250 mm
  • Heavy Duty versions for large bars up to 150 mm diameter
  • Belt grinding motor 11 kW bis 18 kW / 15 HP to 25 HP
  • Belt dimension 150 mm wide x 3500 mm length
  • Workpiece transport system by roller guide with pinch roll system
  • Heavy duty roller guides for solid bars up to 150 mm and over 1 metric ton weight
  • for secure and precise transport which eliminates a risk of spinning tubes
  • Patented pressure controlled grinding and polishing heads
  • Angle adjustable buffing heads with automatic wear compensation


Surface improvements prior to plating, descaling, deburring, superfinishing, finishing for surface checking by ultrasonic, removing surface defects, decorative grinding and polishing, microfinish surface, satin finishing, chrome finishing, steel finishing, Metal polishing, Tube and bar polishing, improving corrosion resistance, removing of coatings ...


tubes, bars, pipe, profiles for furniture industry, decorative stainless, shop interior, engine components, axles, precision engine parts, paper tubes, fiber and kevlar tubes, golf shafts, stainless tube, heat element, door handle, peeled bar, hydraulic cylinder rod, telescopic cylinders, chrome bar, steel bar, boiler tube, rods ...


The belt grinding machines can be equipped with 2 or 4 or 6 stations in one cabin. Multihead machines with 8, 10, 12 heads are configured with 4+4 or 6+2 cabin combinations. The system is fully modular and easy to upgrade with additional stations to grow with future needs of our customers.

Enclosed versions with noise, water and dust proof cabins maximize operating comfort and easy comply with highest safety standards. Dry versions are available also.

Manual up to fully automatic adjusting systems to customers product sizes minimize the setup time loss and maximize the production and profit.

Fist class components and all screws and spindles in stainless steel guarantee maximized life time of products. Optional features like complete belt station in stainless, drying stations, laser measuring, surface checking and more is available.


10 Station heavy duty grinding line with 18kW/25HP high powered stations. Rough grinding of DOM tubes or hot rolled tubes to correct geometry and finishing to final surface for cylinder applications. Customers like Tyssen Krupp, Leistritz and other hydraulic elevator manufacturers use this new technology.

10 Station high speed grinding line for removing the scale after heat treatment of stainless tubes. 0,1 mm removal with 30 m/min on oilfield tubes and tubes for sea cables. Customers like TUBACEX, NIKOPOL, SCHOELLER BLECKMANN, SANDVIK. Special removable double grinding heads can be exchanged in 15 minutes. Minimized down time in a complete production cell with straightening and ultrasonic testing.

6 Station standard grinding and polishing line for stainless steel tubes up to 150 mm and 6 meter length. 11 kW per station with pressure control for belt in dimension 150mm x 3500 mm. Extended belt life because of the constant pressure. Enclosed cabin with mist collector on top for quiet and clean operation. Automatic load and unload tables.

Two 6 Station Tube and bar polishing lines for stainless steel tubes. Rough grinding and final steel finishing (钢的精加工机) to various customer demands of stainless stock holders. Removing of defects on drawn, pilgered or welded tubes. These systems are standard designs specially for medium to high production. Operator safety and minimized service requirement enhence customers profit.


Finishing line for chrome plated bars. Polishing and special "Loeser coating" process for increased corrosion resistance to 200 hours rating 10. Pressure controlled polishing process and teflon coating process on the surface. Medium production with 2 belts and 4 wheel stations. High production systems are equipped 4+4.



Loeser belt grinding technology can also be combined with stone wheel stations like in the photo shown. Special customer products require combinations. Loeser has special "Know how" in the field of nuclear industry for tubes with the biggest worldwide market share in finishing lines.

Superfinish process after belt grinding to reach a surface roughness below Ra 0,04 µm. Special high speed finishing systems for mass production of shock absorbers and front forks of motorcycles. Microfinish of plasma nitrated products and ceramic or HVOF coated surfaces. Enhanced characteristics on bearing surfaces and special applications for hydraulics. Bars up to 160 mm for cylinders of injection molding lines can be finished centerless. The superfinish systems SF102 or SF202 can be equipped with different belt heads like contact roll or contact shoe or stone fixture. See separate description in the superfinish section.




Photo of the load tabel of a standard centerless polishing machine. These magazines are available for length 500 - 6000 mm and parts from 6 mm to 250 mm in diameter. They automatically adjust to different diameters and load the tubes secure in the roller guide. The pinch roll from top brings the product under precise rotation in the grinding area.




Automatic packing lines which seal the tube in clear plastic prefent the tubes form scratch and handling marks. Later transportation is secure and trouble free to deliver a first class product to the tube customers.



Detailed photo of the tubes in the plastic bag. The tube ends can be sealed or left open depending to customer wish. We offer a variety of packing lines depending to customers requirement in speed and automation.



Detailed photo shows the tube held secure between the roller and the pinch roll from top. This system insures absolute controlled motion of the tube and helps to hold the tube in applications of heavy duty grinding. Loeser has invented this system with reduced wear. Superior design versus old fashioned systems with universal joints.

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