JHI-150CNC Internal Grinder

End Face Grinding Device (Optional)
Swiveling spindle head
Motor Fixing Bar
Precise Feed Positioning
Spindle Head Driven by Servo Motor
Automatic Belt Tension Control
Hydraulic Power / Lubrication Unit

Features
Specifications
Grinding Test Report
Standard Accessories
Optional Accessories

The structural parts are manufactured from high quality Meehanite cast iron, tempered and precision machined for maximum durability and long service life. The machine design meets human-engineering theorem, and features easy operation and extra high precision.
Versatile cyclic grinding motions include fully automatic grinding, coarse grinding trimming, fing grinding and spark-free grinding. High accuracy, convenient operation and increased productivity. The machine is ideal for both mass production and small lot flexible grinding operations.
The spindlehead employs high accuracy roller bearings, featuring high accuracy, high rigidity and quiet running. It can be swiveled +8° , making the machine ideal for grinding big taper of workpiece.
The feed axis employs up and roller type linear guideways combined with servo motor drive. It provides rapid traverse and high positioning accuracy, and is suitable for fully automatic grinding functions, such as blind hole grinding, end face grinding and taper grinding.
The control system consists of high quality electronic parts that meet European safety regulations. The electrical cabinet features dust-proof and water-proof construction. The control system also features self-diagnostic function with warning lamp indication.
The machine is equipped with the advanced FANUC control with 8.4" colorful display. The CNC control uses macro machining programs that greatly reduce preparation thime while upgrading machining efficiency.
Forced lubrication system for bed surfaces reduces friction to a minimum. The bed is designed with heat dissipation and outstanding strength, ensuring maximum stability.

End Face Grinding Device (Optional)

When requested, the machine is available to equip with an End Face Grinding Device, allowing the machine to perform internal and end face grinding at one time.
This not only greatly increases machining efficiency but also achieves high perpendicularity accuracy.

Swiveling spindle head

The workhead can be swiveled +8° allowing for grinding tapered parts.

Motor Fixing Bar

Just as the motor starts running, a vibration occurs.
The fixing bar is used for holding the motor in place. Amicrometric adjustment knob is provided for adjusting the belt tension.

Precise Feed Positioning

The grinding wheel feed is driven by a high performance servo motor, combined with precision ball screw transmission, providing high positioning accuracy.

Spindle Head Driven by Servo Motor

The spindle head is driven by a high performance servo motor, providing accurate variable speed change.
The servo motor drive features no speed loss and constant torque output no matter if the spindle is running at high or low speed. It guarantees outstanding grinding surface quality.
The servo motor drive allows spindle positioning control for convenient workpiece release.

Automatic Belt Tension Control

The belt tension is automatically controlled by the motor weight to assure proper belt tension at all times.
This ensures full power transmission from the motor.
The specially designed belt tension eliminates too tight or too loose tensiion problems that may affect grinding quality.

Hydraulic Power / Lubrication Unit

The hydraulic power unit consists of two gear pumps, providing hydraulic power to the chuck and wheel dressing device. It also delivers lubrication oil to base slideways.
The hydraulic power unit consists of high quality parts, featuring low noise running and long service life.
A fan cooling device is mounted on the hydraulic power unit, providing efficient heat dissipation.

Massive Machine Structure

Optimal Structural Design
Guarantees Lifetime Accuracy

To maintain the long term accuracy after years of operation, the machine structure of the JAINNHER Internal Grinding Machine is carefully designed and manufactured.

The machine base is manufactured from high quality cast iron (FC30), tempered and stress relieved for maximum stability of material.
Great span between slideways provides firm support for wheel head assembly.
Ruggedly constructed throunghout for outstanding rigidity and stabiliyt.
Scientific rib reinforcement on the base structure for increased machine rigidity and deformation-free performance.

State-of-the-Art CNC Control

The CNC internal grinding machine is equipped with a FANUC (Oi-Mate TC) control. It employs macro (macro programs) operation interface combined with the use of an 8.4" colorful LCD screen, greatly upgrading production and providing outstanding grinding accuracy.

AUTOMATIC SENSING DEVICE

It can conduct fine surface grinding of interior radii and end faces, and the device monitors the wheel during operation, protecting it from overloading.

Automatic Grinding Cycle

GRINDING TEST REPORT	JHI-150-CNC
Grinding Wheel Specifications	WA 80K5V5A
Workpiece Size	Ø27 ± 0.003 mm
Workpiece Material	SNCM220
Total Grinding Amount	0.34 mm
Rough Grinding Feed Rate	40 mm/s
Ratio	100%
Rough Grinding Amount	0.32
Finish Grinding Feed Rate	25 mm/s
Ratio	100%
Finish Grinding Amount	0.02 mm
Feed for Rough Grinding	0.005 mm
Feed for Finish Grinding	0.002 mm
Polishing Time	30 sec.
Wheel Dressing for Rough Grinding	0.01 mm
Wheel Dressing for Finish Grinding	0.01 mm
Roundness Accuracy	2 um

ITEMS			JHI-150CNC	JHI-150BCNC
Capacity	Range of I.D.grinding		Ø6-150mm	Ø6-150mm
	Max grinding depth		150 mm	150 mm
	Max holding length		200 mm	200 mm
	Swing over bed		500 mm	500 mm
	Swing in chuck guard		280 mm	280 mm
Wheel Head Feeding X-axis	Rapid feed speed		8 m/min	5 m/min
	Max. stroke		100 mm	100 mm
	Min. setting unit		0.001 mm	0.001 mm
Worktable Z-axis	Rapid feed speed		8 m/min	8 m/min
	Max. stroke		450 mm	450 mm
	Min. setting unit		0.001 mm	0.001 mm
Spindle Head	Spindle speed		10-1000 rpm	10-1000 rpm
	Spindle		Standard A2 – 5 Optional cylindrical type	Standard A2 – 5 Optional cylindrical type
	Swivel angle		±8°	±15°
Rotary Table B axis	RPM		-	0-20 rpm
	Min. setting unit		-	0.001°
	Swivel angle		-	±15°
Motor	Grinding wheel spindle motor		Standard 3HP (2.2KW) 2P Standard 3HP (2.2KW) 2P	Build-in type 7.5 KW/10HP
	Spindle head motor		1.5 KW	AC Servo motor 1.5 KW
	X-axis servo motor		0.75 KW	AC Servo motor 0.75KW
	Z-axis servo motor		1.2 KW	AC Servo motor 1.2 KW
	Hydraulic motor		1/4HP (0.18KW) 4P	1 / 4 HP (0.18 KW) 4P
	Hydraulic chuck		1HP (0.75KW) 4P	1 HP (0.75KW) 4P
	Coolant motor		1/4HP (0.18KW) 2P	1 / 4 HP (0.18 KW) 2P
	Rotary table		-	AC Servo motor 1.2 KW
General Specification	Machine measurements L x W x H	Fully splash guard	3600 x 3200 x 2300 mm	3175 x 2500 x 2300 mm
	Machine measurements L x W x H	Semi splash guard	3240 x 2160 x 2300 mm	3175 x 2500 x 2300 mm
	N.W.	Fully splash guard	2900 Kg	-
	N.W.	Semi splash guard	2500 Kg	-
	G.W.	Fully splash guard	3750 Kg	2850 kg
	G.W.	Semi splash guard	2700 Kg	2850 kg

*Specifications may be subject to change without prior notice

Grinding Test Report	Model JHI-150-CNC
Grinding Wheel Specifications	WA 80K5V5A
Workpiece Size	Ø27 ± 0.003 mm
Workpiece Material	SNCM220
Totle Grinding Amount	0.34 mm
Rough Grinding Feed Rate	40 mm/s
Ratio	100%
Rough Grinding Amount	0.32
Finish Grinding Feed Rate	25 mm/s
Ratio	100%
Finish Grinding Amount	0.02 mm
Feed for Rough Grinding	0.005 mm
Feed for Finish Grinding	0.002 mm
Polishing Time	30 sec.
Wheel Dressing for Rough Grinding	0.01 mm
Wheel Dressing for Finish Grinding	0.01 mm
Roundness Accuracy	2 um