• NC Cylindrical Grinder
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JHU－NC Cylindrical Grinding Machine

PRECISION, RIGID SPINDLE

The grinding wheel spindle is supported by two special hydrodynamic bearings on the ends with five-point support, providing maximum rigidity and stability of spindle running. In case insufficient lubrication oil occurs, the spindle stops automatically to avoid wearing on the spindle and bearings.

SPECIAL VIBRATION ABSORBING DESIGN

The forced lubrication system of the grinding wheel spindle features vibration absorbing function. The oil film pressure, created by the hydrodynamic bearings, automatically absorbs vibration according to the current working condition.

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  • Feature
  • Specification
  • Standard Accessories
  • Optional Accessories
  • CNC Advance Measuring Equipment
A COMPETITIVE EDGE FOR FLEXIBLE GRINDING
The workhead can swivel 120°, variable spindle speed.
The spindle can be fixed and runs reversibly, making it ideal for flexible grinding operations for internal and external cylindrical grinding applications.
NC Controller
Using conversational operation interface, with touch screen for maximum operational convenience, easy to learn and understand and significantly enhance the capacity.
Feeding Mode
X-axis servo motor
Z-axis hydraulic movement
Automatic grinding
One-piece Fabricated Base
The machine base is one-piece manufactured from Meehanite cast iron, tempered for maximum stability of material. Box type base construction features superior stability and rigidity.
High Pressure Oil System
Hydraulic Tailstock (CNC)
The sleeve movement is hydraulically operated for convenient workpiece loading and unloading. Workpiece clamping and unloading force can be adjusted by turning a knob. The sleeve is precision machined from hardened alloy, featuring maximum wear resistance and rigidity.
High Pressure Oil System
Universal /NC Cylindrical Grinding Example
NC Cylindrical Grinder

Taper grinding between two centers

NC Cylindrical Grinder

Hold on taper grinding

NC Cylindrical Grinder

Straight plunge grinding

Universal /NC /CNC Cylindrical Grinding Example
NC Cylindrical Grinder

Hold on horizontal grinding

NC Cylindrical Grinder

Horizontal grinding between two centers

Universal Cylindrical Grinding Example
NC Cylindrical Grinder

Internal grinding

NC Cylindrical Grinder

Internal taper grinding

CNC Cylindrical Wheel Dressing Cycles
NC Cylindrical Grinder

Forming wheel with curve

NC Cylindrical Grinder

Straight grinding wheel

CNC Cylindrical Grinding Example
NC Cylindrical Grinder

Curve & end face plunge grinding

NC Cylindrical Grinder

Tapered traverse grinding

 CAPACITY ITEMS MODEL
JHU-
2706 NC1		 JHU-
2710 NC1		 JHU-
2715 NC1		 JHU-
2720 NC1		 JHU-
3506 NC1		 JHU-
3510 NC1		 JHU-
3515 NC1		 JHU-
3520 NC1
Capacity Max Ø work swings(mm) 270 350
Max grinding length(mm) 600 1000 1500 2000 600 1000 1500 2000
Max grinding dia.(mm) 250 330
Max job weight in centers 70 kgs 130 kgs 70 kgs 130 kgs
Workhead Speed range(rpm) 60Hz 11~500 (Variable speed)
50Hz 9~420 (Variable speed)
Swivel angle 120° (CCW:90° ; CW:30°)
Center MT4
Spindle rotation Setting, Normal and reverse rotation
Worktable Horizontal travel speed (mm/min) 50 ~ 4000 50 ~ 3000 50 ~ 4000 50 ~ 3000
Handwheel /revolution(mm) 20
Swivel angle CCW/CW 11° / 6° 9° / 5° 7° / 4° 5° / 3° 11° / 6° 9° / 5° 7° / 4° 5° / 3°
Min travel(mm) 8
Wheel head Grinding wheel size (D x W x B) 405 x (25 ~ 50) x 152.4, 455x50x152.4 (opt.)
Max. peripheral (mm/min) 2000
Grinding wheel speed (2 step)(rpm) 60 Hz 1499:1600(Standard)
1508:1603(Standard)
50 Hz
Total front and rear travel Grinding wheel 175mm Grinding wheel 192mm
Speedy feed travel H type 40 mm/ NC1 type adjustable setting
Wheelhead total feed travel Grinding wheel 135mm Grinding wheel 152mm
Handwheel feed/revolution 1 mm
Tail stock Center travel 30 mm
Center MT4
Motor Grinding wheel motor 3.7KW, (5HP), 4P, 7.5HP (opt.)
Worktable motor 0.4KW, (1/2HP), 4P
Hydraulic motor 1.5KW, (2HP), 4P
Compulsory lubrication motor 0.75KW, (1HP), 4P
Coolant motor 0.2KW, (1/4HP), 2P
Magnetic separator motor 0.03KW, (1/25HP), 4P
Internal grinding motor 1.5KW, (2HP), 2P
X servo motor (NC) 1.5kw
Hydraulic
system		 Hydraulic tank 60L
Compulsory lubrication tank 30L
Coolant tank 100L
General Specification Machine NW. (Approx. Kg) 2850 3770 4600 5100 2950 3870 4700 5200
Machine GW. (Approx. Kg) 3250 4200 5250 6000 3350 4300 5350 6100
Machine size (Approx. mm) L(mm) 2620 3250 4470 7950 2620 3250 4470 7950
W(mm) 2090 2090 2090 2090 2090 2090 2090 2090
H(mm) 1760 1760 1760 1760 1760 1760 1760 1760

Packing size (Approx. mm)

 L(mm) 2800 3400 4500 6150 2800 3400 4500 6150
W(mm) 2250 2250 2250 2250 2250 2250 2250 2250
H(mm) 2100 2100 2100 2100 2100 2100 2100 2100
* Manufacturer reserves the right to change specification without prior notice.
Tools and Tool box

A. Tools and Tool box

Grinding Wheel, Grinding Wheel Flange

B. Grinding wheel and grinding wheel flange

Wheel Dressser

C. Wheel Dressser

X Axis linear scale (only for cnc)

D. X Axis linear scale (only for cnc)

2-point center rest (1m, 1.5m, 2m)

E. 2-point center rest (1m, 1.5m, 2m)

Water Pump and Tank

E. Water pump and tank

Fully enclosed splash guard & oil mist collector (only for cnc)

F. Fully enclosed splash guard & oil mist collector (only for cnc)

Touch probe gauge T18 /PR3 (onle for cnc)

G. Touch probe gauge T18 /PR3 (onle for cnc)

Magnetic Separator

1. Magnetic Separator

Balancing Arbor

2. Balancing Arbor

Balancing Base

3. Balancing Base

3-jaw Chuck

4. 3-jaw Chuck

3-Point Center Rest Assembly

5. 3-Point Center Rest (Big)

3-Point Center Rest Assembly

6. 3-Point Center Rest (Small)

High Speed Spindle

7. High Speed Spindle

Center Ring and Jaw Plate

8. Center Ring and Jaw Plate

Paper Filter

9. Paper Filter

Internal Attachment

10. Internal Attachment

Thickness measuring gauge, Marposs / BS

1. Thickness measuring gauge, Marposs / BS

Z Axis linear scale

2. Z Axis linear scale 

Auto in-process gauge (Marposs)

3. Auto in-process gauge (Marposs)

Auto in-process gauge (BS)

4. Auto in-process gauge (BS)

Automatic grinding wheel balancing system Marposs/BS

5. Automatic grinding wheel balancing system Marposs/BS

Wheel crash control device Marposs/BS

6. Wheel crash control device Marposs/BS

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