Heavy Duty Universal Cylindrical Grinders

Applications: →Heavy duty universal cylindrical grinders are used for the external and internal surface grinding of cylindrical and conical workpieces. →Heavy duty universal cylindrical grinders are suitable for the tool workshop,overhaul workshop and small-lot machining workshop. Features:...

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Product Details

Applications:


→Heavy duty universal cylindrical grinders are used for the external and internal surface grinding of cylindrical and conical workpieces.

→Heavy duty universal cylindrical grinders are suitable for the tool workshop,overhaul workshop and small-lot machining workshop.


Features:


1.The longitudinal movement of the worktable is driven by hydraulic stepless variable speed transmission or hand-wheel transmission. It adopts forced feed lubrication and plastic-filmed guide way, which improves the machine's vibration resistance and running stability at low speed.

2.For the wheel head, its fast forward/backward of feed is driven by hydraulic system, and rough and refined feed is controlled by hand-wheel transmission.

3.The grinding wheel spindle is supported by high-rigidity sleeve type hydro-static/hydrodynamic bearing, with the characteristics of high rotation precision and high rigidity.

4.The work head adopts double-speed motor and three-gear transmissions, gaining the characteristics of high transmission precision, good rigidity and easy-to-operate. The work head spindle uses sliding bearing structure and the clearance of fore bearing is adjustable to meet the needs of center or chuck grinding. And the work head can be adjustable in anti-clockwise direction for any angle within 90 degrees so as to grind internal or external conical work-pieces with chuck.

5.Heavy duty universal cylindrical grinders (Model UG-series) have the function of internal grinding; and the internal grinding spindle is supported by rolling bearing. Through replacing belt pulley, four kinds of rotary speeds can be achieved in order to grind internal cylindrical work-pieces of various diameters.

6.The wheel dressers are respectively installed on worktable and tailstock, providing two kinds of dressing.

7.Heavy duty universal cylindrical grinders have the following features: rational overall layout, attractive appearance, centralized and visualized operating handles, and simple and safe operation.


Technical parameter:


Model

Units

G-630

UG-630

2000

2500

3000

2000

2500

3000

Basic Parameters

Center height

mm

335

335

Distance between centers

mm

2000

2500

3000

2000

2500

3000

Max. swiveling diameter

mm

Φ630

Φ630

External grinding range

Without steady rest

mm

Φ30-Φ180

Φ30-Φ180

With steady rest

mm

Φ30-Φ630

Φ30-Φ630

Internal grinding range

Without steady rest

mm

-

Φ30-Φ300

With steady rest

mm

-

Φ50-Φ300

Max. external grinding length

mm

2000

2500

3000

2000

2500

3000

Max. internal grinding length

mm

-

250

Max. weight between centers

kg

1000

1000

Worktable

Max. swing angle

Clockwise

°

2

2

2

2

2

2

Counter-clockwise

°

4

4

3

3

3

3

Range of hydraulic moving speed

m/min

0.1-3

0.1-3

Max. hydraulic travel

mm

2050

2550

3050

2050

2550

3050

Travel of worktable per revolution

mm

3

3

Wheel head

Size of grinding wheel (OD×W×ID)

mm

Φ750×75×Φ203

Φ750×75×Φ203

Min. diameter of wheel

mm

Φ550

Φ550

Rotation speed of spindle

r/min

900

900

Linear speed of grinding wheel

m/s

35

35

Max. travel (Including rapid travel)

mm

355

355

Rapid hydraulic travel

mm

100

100

Transverse feeding

Travel per revolution

mm

1

1

Micro feeding amount

mm

0.002

0.002

Headstock

Rotation Speed of spindle

n/min

16-160

16-160

Swing angle

Clockwise

°

-

0

Counter-clockwise

°

-

90

Spindle taper

-

Metric 80

Metric 80

Tailstock

Max. retraction of sleeve by manual

mm

90

90

Travel per revolution

mm

6

6

Taper of center

-

Metric 80

Metric 80

Motors

External grinding motor

Power

kw

15

22

Internal grinding motor

Power

kw

2.2

-

Headstock motor

Power

kw

7.5

5.5

Oil pump motor

Power

kw

1.5

1.5

Coolant motor

Power

kw

0.12

0.12

Hybrid oil pump motor

Power

kw

0.75

0.75

Others

Net weight

kg

11500

13000

16000

11500

13000

16000

Gross weight

kg

13000

14500

17500

13000

14500

17500

Packing dimension

Grinding length 2000mm

mm

6300×2400×2200

6300×2400×2200

Grinding length 2500mm

mm

6700×2400×2200

6700×2400×2200

Grinding length 3000mm

mm

8000×2400×2200

8000×2400×2200


Working accuracy:


Model

G-630

UG-630

Grinding accuracy of test-piece between centers

Roundness

mm

0.0025

0.0025

Consistency of the diameter in longitudinal section

mm

0.008

0.008

Roughness

um

Ra0.32

Ra0.32

Grinding accuracy of short test-piece fixed on the chuck

Roundness

mm

0.0035

0.0035

Roughness

um

Ra0.32

Ra0.32

The accuracy of test piece internal grinding on chuck

Roundness

mm

-

0.0025

Consistency of the diameter in longitudinal section

mm

-

0.015

Roughness

um

-

Ra0.63


Accessories of Heavy Duty Universal Cylindrical Grinders


» Notes: according different machine (G-630 and UG-630), equipped accessories is difference.

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