Top Quality, Service Oriented, Reliable

CheinWei Precision Jig Grinder Model JG 1270 (27

CheinWei Precision Jig Grinder Model JG 1270 (27" x 48" travels)

Precision Jig Grinder Model JG-1010 (40

Precision Jig Grinder Model JG-1010 (40" x 40" travels)

Precision Jig Grinder Model JG-510 (12

Precision Jig Grinder Model JG-510 (12" x 20" travels)

Chien Wei Jig Grinders

Chien Wei Precise Technology is a worldwide, leading manufacturer of high precision CNC jig grinding machines.  Since their inception over (30) thirty years ago, Chien Wei Precise Technology has grown into one of the most respected, well known, manufacturers of high precision, CNC machine tools, in Taiwan.

Chien Wei offers (3) three different sizes of CNC jig grinders (12" x 20", 27" x 48" and 40" x 40").

The smaller machine is a "C" frame type machine, and the (2) two larger machines are both '"bridge" type machines.  All of the jig grinders offered come standard with fully programmable X, Y, Z, W, C and U axes, as well as an electric grinding head.

The Z axis is controlled by a high speed linear motor, which features zero backlash, and rapid precise machining technology, to easily grind 3D type parts.

Together, with our knowledge, and expertise, we sincerely expect the name, "Chien Wei", to become well known, in North America, quite rapidly.

Below are some important specifications of each machine;

Model JG-510Model JG-1270Model JG-1010
X axis travel 20" 48" 40"
Y axis travel 12" 27" 40"
Z axis travel 3.9" 3.9" 9.8"
W axis travel 13.4" 15.7" 15.7"
U axis travel 1.18" 1.18" 1.18"
Table Size 27.6" x 13.4" 42.5" x 33.9" 47.2" x 47.2"
Accuracy .000059" .000059" .000059"

For detailed specifications of each machine, and more information, please download the brochure, or contact NASA Machine Tools.

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A jig grinder is a machine tool used for grinding complex shapes and holes where the highest degrees of accuracy and finish are required. The jig grinder is very similar to a jig borer, in that the table positioning and spindles are very accurate (far more than a manual milling machine or lathe). It is almost used by tool and die makers in the creation of jigs or mating holes. There are usually many peripheral elements to a jig grinder, including linear motors, pneumatic grinding head (or electrical grinding head), and various cooling systems for supplying coolant to the work and machine itself.

The machine operates by a high speed spindle rotation. The spindles are removable and interchangeable to achieve varying process speeds. Some spindles are fixed speed (60,000 rpm), others are adjustable (30,000 ~ 50,000 rpm), and still others are very high speed (150,000 rpm). The main spindle has a wide range of speeds to ensure proper grinder feed rates are maintained. The machines have a standard X and Y table. All axes are indexed to 0.0001 on the handwheels. The machine head adopts linear motors. The spindle rotates at a variable speed and with an accuracy of 0.0001 for very precise holes and grinding. A reliable jig grinder will let work to achieve a higher degree of efficiency level. These features are all critical in precise process.


Download our latest brochures and get up to date information on our Jig Grinders as well as our High Speed CNC Producers!


Inquire about this product and parts and service we provide. We can also provide custom made machines.

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