• Centerless Grinder
  • Centerless Grinder
  • Centerless Grinder

YTC12 Centerless Grinder

1. The centerless grinder adopts a high-grade cast iron (FC300) lathe bed. Its internal stress is eliminated through appropriate heat treatment to ensure the durability of the machine.

2. The spindles of the grinding wheels and regulating wheels are made of high-quality alloy steel (SNCM-439) that has undergone normalization, tempering, high-frequency and subzero treatments before the precision grinding, in order to improve product stability, prevent deformation and prolong service life.

3. Λ-shaped slide rails and double wedge auxiliary guides are used for the bottom slide. The double Λ-shaped slide rails have undergone high-frequency hardening treatment and precision grinding, which can block out mud, while offering a lightweight and precise structure.

4. Dresser: 

The dressing device is made of high-grade cast iron (FC300) via precision grinding and scarping. The angle of the dressing device on the regulating wheel can be adjusted (±5º) during grinding according to the nature of the workpiece and actual requirements, so as to ensure a good contact surface between the workpiece and regulating wheel, and to achieve optimal straightness and surface precision.

5. Gearbox:

The gearbox is made of high-grade alloy steel (SCM-415), with the gear surface and inner diameter having undergone precision grinding to help achieve the optimal abrasion resistance during gear operation, as well as to sustain heavy loads.

6. Description of the grinding principles:

The grinding method of the centerless grinder does not require jacking the center hole, but supporting the workpiece with the carbide blade instead. It is composed of 3 parts: grinding wheel, regulating wheel and work rest blade.

a.   The grinding wheel smoothes the surface of the workpiece to achieve the required fineness.

b.   The regulating wheel drives the rotation and grinding speed of the workpiece; the distance between the guide wheel and the grinding wheel is the outer diameter of the processed workpiece.

c.   The work rest blade can support the workpiece during grinding, which allows the workpiece to rotate on the carbide blade surface while ensuring the horizontal movement of the workpiece.

7. Applicable industries:

Automobile parts, damper, steering system, oil pressure valve element, aerospace components, medical application, precision bearing, high-precision machine parts, electronics, cutting tools, oil pressure and pneumatic system.

8. Applicable products:

Starting shaft, transmission shaft, balance shaft, bolt, transmission parts, universal joint, ball screw, bearing component, bearing ring, camshaft, pinion shaft, valve, rolling element, axis parts, etc.


Specification Unit YTC12

Standard work rest (Dia.)



Special work rest (Dia.)



Grinding wheel size

 (Dia. x Width x Hole)


Ø305 x 150 x Ø120

Grinding wheel speed



Grinding wheel motor


7.5 HP

Regulating wheel size

(Dia. x Width x Hole)


Ø205 x 150 x Ø90

Regulating wheel speed


20 ~ 337 (10 Steps)

Regulating wheel motor



Regulating wheel tilt angle


+5° ~ -3°

Regulating wheel swivel angle



Upper slide feed graduation


3.5 mm/rev., 0.05mm/graduation

Upper slide micro-feed graduation


0.1 mm/rev., 0.001mm/graduation

Upper slide feed graduation


7 mm/rev., 0.05mm/graduation

Lower slide micro-feed graduation


0.2 mm/rev., 0.001mm/graduation

Dressing device graduation


1.25 mm/ rev., 0.01mm/graduation

Hydraulic pump motor


1 HP

Coolant pump motor


1/8 HP

Machine dimension


1650x 1550 x 1350

Net weight



Gross weight



Standard Accessories
  • 1. Grinding wheel and flange
  • 2. Regulating wheel and flange
  • 3. Standard thrufeed work rest and carbide blade
  • 4. Standard infeed work rest and carbide blade
  • 5. Diamond dresser x 2 pcs
  • 6. Thrufeed safety pressing device
  • 7. Flange extractor x 1 set
  • 8. Thrufeed tank
  • 9. Cutting fluid tank and pump
  • 10. Front/rear baffle plate
  • 11. Oil tank and pump
  • 12. Work lamp
  • 13. Leveling screw and leveling plate
  • 14. Toolbox and tools x 1 set


Optional Accessories

  • 1. Magnetic separator
  • 2. Paper filter
  • 3. Vibratory feeder
  • 4. Hydrocyclone coolant separator
  • 5. Automatic loading device for thrufeed grinding
  • 6. Automatic receiver for thrufeed grinding
  • 7. Profile template
  • 8. Long bar grinding device
  • 9. End face dressing device for grinding wheel
  • 10. Balancing stand and arbor
  • 11. Automatic infeed device driven by hydraulic for infeed grinding
  • 12. Manual feeder for infeed grinding
  • 13. Ejector for infeed grinding