CG500C UCG500C Cylindrical Grinding Machine
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CG500C UCG500C Cylindrical Grinding Machine
  • CG500C UCG500C Cylindrical Grinding Machine

CG500C UCG500C Cylindrical Grinding Machine

CG500C cylindrical grinding machines is suitable for grinding external cylindrical surfaces of rotary workpiece of cylinder and taper. Universal cylindrical grinding machines is suitable for grinding external & internal surfaces of rotary workpieces.
  • CG500C UCG500C Cylindrical Grinding MachineDownload
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Technical parameters
Model CG500 UCG500
Type C C
Distance between centers  mm 2000; 2500; 3000
(79”; 98”; 118”)
2000; 2500; 3000
(79”; 98”; 118”)
Center height mm 270 (11”) 270 (11”)
Max. swiveling diameter  mm Φ500 (20”) Φ500 (20”)
Max. grinding length mm 2000; 2500; 3000
(79”; 98”; 118”)
2000; 2500; 3000
(79”; 98”; 118”)
Grinding range mm Φ30~Φ500 (1.2-20”) Φ30~Φ500 (1.2-20”)
Internal grinding range  mm   Φ50~Φ250 (2-9.8”)
Max. weight of workpiece between centers kg 1000 1000
Grinding wheel Dimensions (OD × W × ID) mm Φ750×75×305
(30x3x12”)
Φ750×75×305
(30x3x12”)
Max. linear velocity  m/s 35 35
Swiveling angle of table Clockwise
Counter-clockwise
Taper hole of spindle Work head  MT-6  MT-6
Tailstock  MT-6  MT-6
Total power  kW 18 20
Net weight   kg 8100; 8500; 10000 8100; 8500; 10000
Packing dimensions L  mm 6000; 6700; 7800 6000; 6700; 7800
W  mm 2200 2200
H  mm 2000 2000
 
Standard accessories of CG500C Cylindrical Grinding Machine
1. Grinding wheel dresser;
2. Plane grinding wheel;
3. Balancing arbor;
4. Carbide tipped centers; 
5. Single-head spanner;
6. Coolant tank;
 
Standard accessories of UCG500C Universal Cylindrical Grinding Machine
1. Grinding wheel dresser;
2. Plane grinding wheel;
3. Balancing arbor;
4. Carbide tipped centers; 
5. Single-head spanner;
6. Coolant tank;
7. Three-jaw chuck;
8. Wedges;
9. Internal grinding attachment;
10. Internal wheel;
 
Optional accessories of CG500C Cylindrical Grinding Machine
1. Open center rest;
2. Four-jaw chuck;
3. Diamond pen;
4. Grinding wheel balancing stand;
5. Live work head;
 
Optional accessories of UCG500C Universal Cylindrical Grinding Machine
1. Close center rest;
2. Open center rest; 
3. Four-jaw chunk;
4. Grinding wheel balancing stand;
5. Diamond pen;

Features 
1. CG500C cylindrical grinding machines is suitable for grinding external cylindrical surfaces of rotary workpiece of cylinder and taper.
2. Universal cylindrical grinding machines is suitable for grinding external or internal surfaces of rotary workpiece of cylinder and taper.
3. The longitudinal movement of worktable is driven by hydraulic stepless variable speed transmission or hand-wheel transmission; the guideway is plastic-filming and features on forced oil lubrication, absorbing vibration, anti-friction as well as smooth low speed operations.
4. For the wheel head, fast forward/backward of infeed is driven by hydraulic system, while rough and fine feed is controlled by hand wheel transmission.
5. The grinding wheel spindle is supported by high-rigidity sleeve type hydrostatic/hydrodynamic bearing with high rotary precision and high rigidity.
6. The work head adopts double-speed motor plus three-gear transmissions with high transmission precision, good rigidity and easy operation. The work head spindle of UCG500C is of sliding bearing structure and the clearance of front bearing is adjustable to meet the needs of installing center or chuck in grinding; also adjustable in anti-clockwise direction for any angle within 90 degrees to facilitate the grinding of internal or external taper workpiece with chuck.
7. UCG500C universal cylindrical grinder internal grinding spindle is supported by rolling bearing; four rotary speeds can be achieved through replacing belt pulley to grind internal cylindrical workpiece of various diameters.
8. The wheel dressers are respectively installed on worktable and tailstock and provided with two kinds of dressing.

Cylindrical grinder/Cylindrical Grinding Machine is a type of grinding machine used to shape the outside of an object. The cylindrical grinder can work on a variety of shapes, however the object must have a central axis of rotation. This includes but is not limited to such shapes as a cylinder, an ellipse, a cam, or a crankshaft.

A cylindrical grinder
Cylindrical grinder/Cylindrical Grinding Machine is defined as having four essential actions:
The work (object) must be constantly rotating;
The grinding wheel must be constantly rotating;
The grinding wheel is fed towards and away from the work;
Either the work or the grinding wheel is traversed with respect to the other.
While the majority of cylindrical grinders employ all four movements, there are grinders that only employ three of the four actions.

History of cylindrical grinder
The origins of the cylindrical grinder, as with all other modern machine tools, stem from the experimentation and invention of John Wilkinson and later Henry Maudslay who built the first horizontal boring machine and the first engine lathe, respectively. The cylindrical grinder owes much of its development from the onset of the Industrial Revolution, particularly to the advent of reliable, inexpensive steel production and later the improvement of the grinding wheel. The basis for the modern day cylindrical grinder was first built in the 1830s by two men working independently, Jonathan Bridges and James Wheaton . It is unclear as to which man had first produced the machine but both are closely tied to the first historical appearance of the modern day tool. It took another 40 years before further improvement and refinement of the tool occurred.

The Brown & Sharpe company in Providence, RI was one of the first builders of the Willcox & Gibbs Sewing Machine, one of the first piece of precision machinery to be used in a residential setting. Brown believed that the shaft and needle bars of the sewing machine must be crafted from hardened tool steel. It was this desire that led to their experimentation with building a cylindrical grinder. The first attempt was simply a small lathe with a grinding wheel mounted to it. Subsequent attempts led to the cylindrical grinder displayed at the 1876 Centennial Exposition and the subsequent patent.

Types of cylindrical grinder/Cylindrical Grinding Machine
There are five different types of cylindrical grinding: outside diameter (OD) grinding, inside diameter (ID) grinding, plunge grinding, creep feed grinding, and centerless grinding.

Outside diameter grinding
OD grinding is grinding occurring on external surface a of an object between the centers. The centers are end units with a point that allow the object to be rotated. The grinding wheel is also being rotated in the same direction when it comes in contact with the object. This effectively means the two surfaces will be moving opposite directions when contact is made which allows for a smoother operation and less chance of a jam up.

Inside diameter grinding
ID grinding is grinding occurring on the inside of an object. The grinding wheel is always smaller than the width of the object. The object is held in place by a collet, which also rotates the object in place. Just as with OD grinding, the grinding wheel and the object rotated in opposite directions giving reversed direction contact of the two surfaces where the grinding occurs.

Plunge grinding
A form of OD grinding, however the major difference is that the grinding wheel makes continuous contact with a single point of the object instead of traversing the object.

Creep feed grinding
Creep Feed is a form of grinding where a full depth of cut is removed in a single pass of the wheel. Successful operation of this technique can reduce manufacturing time by 50%, but often the grinding machine being used must be designed specifically for this purpose. This form occurs in both cylindrical and surface grinding.

Centerless cylindrical grinder
A schematic of the centerless grinding process.
Centerless grinding is a form of grinding where there is no collet or pair of centers holding the object in place. Instead, there is a regulating wheel positioned on the opposite side of the object to the grinding wheel. A work rest keeps the object at the appropriate height but has no bearing on its rotary speed. The workblade is angled slightly towards the regulating wheel, with the workpiece centerline above the centerlines of the regulating and grinding wheel; this means that high spots do not tend to generate corresponding opposite low spots, and hence the roundness of parts can be improved. Centerless grinding is much easier to combine with automatic loading procedures than centered grinding; throughfeed grinding, where the regulating wheel is held at a slight angle to the part so that there is a force feeding the part through the grinder, is particularly efficient.

Control methods
There are three basics ways in which an operator can interact with a cylindrical grinder. Either manual manipulation of the machine, Numerical Control with a punched card system or using Computer Numerical Control using a pre existing interface designed for that machine or by using a PC as an interface to communicate with the grinder. The first two options are rarely if ever used today. CNC operated cylindrical grinders are the most technologically advanced, efficient, reliable systems in the manufacturing industry.

Applications
The cylindrical grinder is responsible for a plethora of innovations and inventions in the progression of science and technology. Any situation in which extremely precise metalworking is required, the cylindrical grinder is able to provide a high level of precision.[citation needed] From the automotive industry to military applications, the benefits of the cylindrical grinder are numerous.
Standard accessories of CG500C Cylindrical Grinding Machine
1. Grinding wheel dresser;
2. Plane grinding wheel;
3. Balancing arbor;
4. Carbide tipped centers; 
5. Single-head spanner;
6. Coolant tank;
 
Standard accessories of UCG500C Universal Cylindrical Grinding Machine
1. Grinding wheel dresser;
2. Plane grinding wheel;
3. Balancing arbor;
4. Carbide tipped centers; 
5. Single-head spanner;
6. Coolant tank;
7. Three-jaw chuck;
8. Wedges;
9. Internal grinding attachment;
10. Internal wheel;
Technical parameters
Model CG500 UCG500
Type C C
Distance between centers  mm 2000; 2500; 3000
(79”; 98”; 118”)
2000; 2500; 3000
(79”; 98”; 118”)
Center height mm 270 (11”) 270 (11”)
Max. swiveling diameter  mm Φ500 (20”) Φ500 (20”)
Max. grinding length mm 2000; 2500; 3000
(79”; 98”; 118”)
2000; 2500; 3000
(79”; 98”; 118”)
Grinding range mm Φ30~Φ500 (1.2-20”) Φ30~Φ500 (1.2-20”)
Internal grinding range  mm   Φ50~Φ250 (2-9.8”)
Max. weight of workpiece between centers kg 1000 1000
Grinding wheel Dimensions (OD × W × ID) mm Φ750×75×305
(30x3x12”)
Φ750×75×305
(30x3x12”)
Max. linear velocity  m/s 35 35
Swiveling angle of table Clockwise
Counter-clockwise
Taper hole of spindle Work head  MT-6  MT-6
Tailstock  MT-6  MT-6
Total power  kW 18 20
Net weight   kg 8100; 8500; 10000 8100; 8500; 10000
Packing dimensions L  mm 6000; 6700; 7800 6000; 6700; 7800
W  mm 2200 2200
H  mm 2000 2000
Optional accessories of CG500C Cylindrical Grinding Machine
1. Open center rest;
2. Four-jaw chuck;
3. Diamond pen;
4. Grinding wheel balancing stand;
5. Live work head;
 
Optional accessories of UCG500C Universal Cylindrical Grinding Machine
1. Close center rest;
2. Open center rest; 
3. Four-jaw chunk;
4. Grinding wheel balancing stand;
5. Diamond pen;
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