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Universal Cylindrical Grinder

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.

Feeding mode

  • Manual grinding feeding
  • Z-axis Hydraulic movement/ Manual movement


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.

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
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Taper grinding between two centers

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Hold on taper grinding

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Straight plunge grinding

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Hold on horizontal grinding

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Horizontal grinding between two centers

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Internal grinding

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Internal taper grinding

CNC cylindrical wheel dressing cycles
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Forming wheel with curve

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Straight grinding wheel

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Curve & end face plunge grinding

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Tapered traverse grinding

CAPACITY ITEMS MODLE
JHU-2706CNC JHU-2710CNC JHU-2715CNC JHU-2720CNC JHU-3506CNC JHU-3510CNC JHU-3515CNC JHU-3520CNC
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
Range of touch probe 500 900 1400 1900 500 900 1400 1900
Workhead Speed range(rpm) 60Hz 11~500 (Variable speed)
50Hz 9~420 (Variable speed)
Swivel angle 120° (CCW:90° ; CW:30°)
Center MT.4
Spindle rotation Setting, Normal and reverse rotation
Worktable Swivel angle CCW/CW 11° / 6° 9° / 5° 7° / 4° 5° / 3° 11° / 6° 9° / 5° 7° / 4° 5° / 3°
Max.feed ratc 8 mm
Min. setting unit (mm) 0.001 mm
Wheel head Grinding wheel size (D x W x B) 405 x (25 ~ 50) x 152.4, 455 x 50x152.4(opt.)
Max peripheral (m/min) 2000
Grinding wheel speed (2 step)(rpm) 60 Hz 1499:1600(Standard)
1508:1603(Standard)
50 Hz
Max. feed rate 6 m/min
Max.stroke Grinding wheel 175mm
Min. setting unit 0.001 mm
Tail stock Center travel 30 mm
Center MT4
Motor Grinding wheel motor 3.75KW, 5HP, 4P, 7.5HP(opt.)
Worktable motor 1.8KW
Hydraulic motor 0.75KW, (1HP), 4P
Compulsory lubrication motor 0.75KW, (1HP), 4P
Coolant motor 0.2KW, (1/4HP), 2P
Magnetic separator motor 0.03KW, (1/25HP), 4P
Servo motor(X) 1.2 KW
Servo motor(Y) 1.8 KW 1.8 KW 2.5 KW 2.5 KW 1.8 KW 1.8 KW 2.5 KW 2.5 KW
Hydraulic
system
Hydraulic tank 60L
Compulsory lubrication tank 30L
Coolant tank 100L
General Specification Machine N.W. (Full cover) 4250 5370 6500 7400 4350 5470 6600 7500
Machine G.W. (Approx. kgs) 4850 6000 7400 8400 4950 6100 7500 8500
Machine size (Approx) L(mm) 3740 4700 6400 6800 3740 4700 6400 6800
W(mm) 2160 2160 2160 2160 2160 2160 2160 2160
H(mm) 2310 2310 2310 2310 2310 2310 2310 2310
Packing size (Approx) L(mm) 4000 5000 6600 7000 4000 5000 6600 7000
W(mm) 2280 2280 2280 2280 2280 2280 2280 2280
H(mm) 2300 2300 2300 2300 2300 2300 2300 2300
* 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

2-point Center Rest

C. Wheel Dressser

Wheel Dressser

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

Water Pump and Tank

E. Water pump and tank

Magnetic Separator

A. Magnetic Separator

Balancing Arbor

B. Balancing Arbor

Balancing Base

C. Balancing Base

3-jaw Chuck

D. 3-jaw Chuck

3-Point Center Rest Assembly

E. 3-Point Center Rest Assembly(Big)

3-Point Center Rest Assembly

F. 3-Point Center Rest Assembly(Small)

High Speed Spindle

G. High Speed Spindle (8,000~20,000rpm)

Center Ring and Jaw Plate

H. Center Ring and Jaw Plate(6", 7")

Paper Filter

I. Paper Filter

Internal Attachment

J. Internal Attachment

Magnetic Separator

A. Marposs/BS : Thickness measuring gauge

Balancing Arbor

B. T18/PR3: Touch probe gauge 

Balancing Base

C. Z-axis linear scale

3-jaw Chuck

D. Auto in-process gauge (Marposs)



E. Auto in-process gauge(BS)



E. Auto in-process gauge(BS)



F. Wheel balancing system(BS)



F. Wheel balancing system(BS)

High Speed Spindle

G. Wheel crash control device(Marposs)