Centerless Grinder

STC-CNC Series

CNC Centerless Grinder STC-CNC

Feature

Sand Repairing Device

A hydraulic dressing unit on both the grinding and regulating wheels with precisely handscraped guide ways provides stable hydraulic movement and the best dressing effects. Various types of form dressing can be achieved with optional templates.

  • NC model: optional auto. grinding wheel dressing device enables count dressing, time dressing, or auto dressing and compensation
  • CNC model: with two axes servo control and the automatic compensation system can precisely dress forms with complicated shapes.
  • Various workrest design: E-tech developed various kinds of workrest based on different diameter of workpieces, which are easy for operating adjustment.

Spindle: Dynamic/Static Pressure Spindle

Both grinding & regulating wheel spindles are made of Ni-Cr-Mo alloy steel, which is normalized, carbonized, hardened and grounded.

Adjustment Wheel Servo Vontrol

The regulating wheel utilizes a servo motor which provides infinitely variable speeds. The speed can be set digitally to reach constant surface speeds even when the diameter of the regulating wheel changes. Consequently, better surface finishes and roundness of the workpiece can be achieved. A beltdriven transmission system is also adopted for the regulating wheel for less vibration and noise compare to traditional chain-driven system

Stop Grinding Automatic Feed (NC Type)

Automatic infeed models (NC) are equipped with a PLC touch screen control with easy learning conversational software.
An infeed grinding cycle can be completed by simply choosing the grinding cycle mode (single or automatic), inputting grinding data and then pressing cycle start.

Adjust Wheel Feed

A double inverted “V” slideway with optimum spacing for the regulating wheel assembly provides smooth movement and stable grinding operation.

Mechanical Base

The machine base is made of Meehanite castings designed to reduce vibration. The machine base provides stable support to the grinding wheel and regulating wheel assemblies to ensure a rigid machine foundation and better accuracy.

Grinding Example

Cll Grinding mode

Thrufeed grinding

Thrufeed grinding

Thrufeed grinding

Thrufeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Infeed grinding

Specification

ModelSTC-CNC 1808/1810/1812STC-CNC 2008/2010/2012STC-CNC 2408/2410/2412
Grinding Capacity
Work diameter (w/standard workrest)0.04" - 2.36"0.04" - 2.36"0.04" - 3.14"
Work diameter (w/special workrest)2.36" - 4"2.36" - 4.7"3.14"- 5.9"
Auto infeed min. increment0.00001"0.00001"0.000001"
Grinding Wheel
Wheel size (OD x Width x ID) 08 type18" x 8" x 9"20" x 8" x 12"24" x 8" x 12"
Wheel size (OD x Width x ID) 10 type 18" x 10" x 9"20" x 10" x 12"24" x 10" x 12"
Wheel size (OD x Width x ID) 12 type18" x 12" x 9" 20" x 12" x 12" 24" x 12" x 12"
Motor rated power / max. torque15hp/71nm (Opt.20/97)20hp/97nm (Opt.25/120)20hp/97nm (Opt.30/143)
Spindle speed1,400 rpm1,250 rpm1,050 rpm
Dressin infeed servo motor (X, opt)0.54hp/2.5nm0.54hp/2.5nm0.54hp/2.5nm
Dressin infeed servo motor (Y opt)1hp/4.9nm1hp/4.9nm1hp/4.9nm
Regulating Wheel
Wheel size (OD x Width x ID) 08 type 10" x 8" x 4.3" 12" x 8" x 5" 14" x 8" x 6"
Wheel size (OD x Width x ID) 10 type 10" x 10" x 4.3" 12" x 10" x 5" 14" x 10" x 6"
Wheel size (OD x Width x ID) 12 type 10" x 12" x 4.3" 12" x 12" x 5" 14" x 12" x 6"
Spindle speed (infinite variable)15rpm - 310rpm15rpm - 310rpm15rpm - 310rpm
Dressin infeed servo motor (X1, opt)0.54 hp0.54 hp0.54 hp
Dressin traverse servo motor (Y1 opt)1 hp1 hp1 hp
Lower slide infeed servo motor (Z, opt)2.4 hp2.4 hp3.35 hp
Regulating wheel infeed servo motor (Z1, opt)1.6 hp1.6 hp1.6 hp
Swivelling angle (L/R)±5°±5°±5°
Min. infeed unit0.00001"0.00001"0.00001"
Incline angle (F/R) +5° - -3° +5° - -3° +5° - -3°
Regulating wheel motor4 hp4 hp6.7 hp
Motor
Hydraulic motor1 hp1 hp1 hp
Machine
Net Weight7,275 lbs7,495 lbs13,448 lbs
Gross weight7,936 lbs8,157 lbs14,550 lbs
Packing size (L x W x H)106" x 88" x 73"106" x 88" x 73"141" x 88" x 81"
ModelSTC-CNC 1808/1810/1812STC-CNC 2008/2010/2012STC-CNC 2408/2410/2412
Grinding Capacity
Work diameter (w/standard workrest)0.04" - 2.36"0.04" - 2.36"0.04" - 3.14"
Work diameter (w/special workrest)2.36" - 4"2.36" - 4.7"3.14"- 5.9"
Auto infeed min. increment0.00001"0.00001"0.000001"
Grinding Wheel
Wheel size (OD x Width x ID) 08 type18" x 8" x 9"20" x 8" x 12"24" x 8" x 12"
Wheel size (OD x Width x ID) 10 type 18" x 10" x 9"20" x 10" x 12"24" x 10" x 12"
Wheel size (OD x Width x ID) 12 type18" x 12" x 9" 20" x 12" x 12" 24" x 12" x 12"
Motor rated power / max. torque15hp/71nm (Opt.20/97)20hp/97nm (Opt.25/120)20hp/97nm (Opt.30/143)
Spindle speed1,400 rpm1,250 rpm1,050 rpm
Dressin infeed servo motor (X, opt)0.54hp/2.5nm0.54hp/2.5nm0.54hp/2.5nm
Dressin infeed servo motor (Y opt)1hp/4.9nm1hp/4.9nm1hp/4.9nm
Regulating Wheel
Wheel size (OD x Width x ID) 08 type 10" x 8" x 4.3" 12" x 8" x 5" 14" x 8" x 6"
Wheel size (OD x Width x ID) 10 type 10" x 10" x 4.3" 12" x 10" x 5" 14" x 10" x 6"
Wheel size (OD x Width x ID) 12 type 10" x 12" x 4.3" 12" x 12" x 5" 14" x 12" x 6"
Spindle speed (infinite variable)15rpm - 310rpm15rpm - 310rpm15rpm - 310rpm
Dressin infeed servo motor (X1, opt)0.54 hp0.54 hp0.54 hp
Dressin traverse servo motor (Y1 opt)1 hp1 hp1 hp
Lower slide infeed servo motor (Z, opt)2.4 hp2.4 hp3.35 hp
Regulating wheel infeed servo motor (Z1, opt)1.6 hp1.6 hp1.6 hp
Swivelling angle (L/R)±5°±5°±5°
Min. infeed unit0.00001"0.00001"0.00001"
Incline angle (F/R) +5° - -3° +5° - -3° +5° - -3°
Regulating wheel motor4 hp4 hp6.7 hp
Motor
Hydraulic motor1 hp1 hp1 hp
Machine
Net Weight7,275 lbs7,495 lbs13,448 lbs
Gross weight7,936 lbs8,157 lbs14,550 lbs
Packing size (L x W x H)106" x 88" x 73"106" x 88" x 73"141" x 88" x 81"

Accessories

Standard Accessories
Tools and tool box
Standard coolant tank
Wheel extractor
Diamond dresser
Levelling bolts and blocks
Grinding wheel with flange
Regulating wheel with flange
Spindle lubrication system w/ cooling fan
Regulating wheel with flange
Manual lubricator for guide ways (S model)
Operation manual and part lists
Thrufeed workrest
Infeed workrest
Control panel (S model)
PLC controller + touch screen + control panel (NC model)
FANUC 0i-TF CNC controller (CNC model)
Optional Accessories
Vibration feeder auto. loading system
Forming attachment (forming plates)
Coolant system with magnetic separator
Thrufeed blade (various sizes)
Infeed blade (various sizes)
Hydraulic forming attachment
Coolant system with paper filter
Auto. unloading system for thrufeed grinding
Coolant system with magnetic separator & paper filter
Infeed grinding workpiece eject attachment (hydraulic / pneumatic)
Auto. loading system for thrufeed grinding (Φ0.197"~0.984", L 1.968"~23.6")
Hopper type auto. loading system for thrufeed grinding (Φ0.078"~0.314", L 1.968"~7")
Minor diameter workrest (dia. 0.027"~0.314")
Special workrest (for large dia. Workpiece)
Input rail & output rail
Balancing stand/ arbor
Spare regulating wheel flange
Spare grinding wheel flange
CE standard electrical cabinet

PROMOTIONS

PROMOTIONS