JHG-1020 Center Hole Grinider

The machine is suitable for cuting tool, spindle, tool holder, gear shafts and tempered transmission shafts and the workpiece requests high accuracy from cylindrical grinding. The quality of cylindrical grinding will depend on the center holes circular geometrical accuracy.

Feature
Specifications
Standard Accessories
Optional Accessories

Upper Swing center and Lower Center Device Keep upper swing center ad lower center consistency benchmark.

Workpiece Holding Device

Automatic workpiece clamping simplify the setting job.(can be based on processing needs and provide different clamping devices)

Workpiece Driving Device

While grinding, the workpiece driven simultaneous.It improves the center hole and cylindrical concentric accuracy, the speed can be changed by frequency converter.

Exclusive Design of Grindling Operation

With exclusive 3D design of synchronized grinding motion, the machine will be very stable and automatically locates center.
1.Grinfing wheel rotation.
2.Planetary motion of grinding wheel spindle
3.Grinding wheel reciprocating motion will be along conical surface.
Based on three-axis simultaneous grinding action, grinding out heterogeneous pattern, with a small oil groove feature, oil film can be formed in a permanent between workpiece and center of cylindrical grinding machine.This is to prevent non-film stuck with the center and can eliminate unnecessary error, in order to facilitate high quality cylindrical grinding.

Grinding Wheel Spindle Head

Grinding wheel spindle head is combination of the spindle head, planetary motion mechanism, wheel spindle, dressing device and spindle motion mechanism.
Rotating of grinding wheel spindle driven by 1/2HP x 2P motor, through the appropriate pressure tension of idler, driving wheel spindle in high speed rotating.The speed can be changed by frequency converter.
Planetary transmission device adopt 1/5HP x 8P motor, which can be simultaneously doing wheel spindle planetary motion and reciprocating motion along on conical surface.
Grinding wheel spindle use sleeve design, easy assembling, with 4 high-speed precision P4 class Angular ball bearings support in front and back and oil mist lubrication, have high speed and precision characteristics.

Exclusive design of grinding operation

The atomizer device for grinding wheel spindle connect with 1~8kg/cm² compressed air, therefore, the oil mist produced 1.5~2kg/cm² pressure for lubrication.

Conical type Wheel Dressing Device

This device placed on the side of grinding wheel head, can be manually rotate into dressing position and while dressing only wheel spindle rotating.During operation, the device moved longitudinal and the diamond dresser moved simultaneousback and forth oscillation of lateral motion, along the wheel cone linear movement.This ensures the consistency geometric accuracy of wheel shape, completely non-effect on dresser position and wearing.

ITEM		MODLE
ITEM		JHG-1020
Sizes of workpiece	Range of clamping	Ø5 - Ø90 mm
	Range of length	50 ~ 2000 mm
	Max. weight workpiece	100 kg
Capacity	Center hole angle	60°
	Dia. of center hole	Ø2 - Ø60 mm
	Planetary reciprocation	1.5 mm
Motors	For spindle	1/2 HP AC
	Planetary reciprocation	1/5 HP AC
	For workpiece Drive	1/2 HP AC
Spindle of grinding wheel	Travel of spindle	150 mm
	Max. travel of one revolution of wheel	1 mm
	Travel for one revolution of wheel	0.01 mm
	Speed of spindle	20000 rpm
Grinding stone dressing device	Travel of dressing diamond	40 mm
	Vertical travel for one revolution of wheel	1.5 mm
	Horizontal travel for one revolution of wheel	1.5 mm
Electric power supply	Voltage & spindle	3PH 220V 60Hz
Electric power supply	Capacity	1.9 KVA
Weight	Net Weight	930 kg

A. Supporter

B. Ø30 Tungsten Long Center

C. Concentric Adjusting Rod

D. Tool Box & Tools

E. Ø30 Tungsten Short Center

F. Grinding Wheel

A. Dust Collector

B. Ø52 Tungsten Short Center

C. Ø52 Center

D. BS