About Us

Ⅰ.Our History

BEIJING DEMINA PRECISION MACHINERY CO., LTD was founded in 2003. As the cutter regrinding advocate and pioneer of the industry, Deming, the company has accumulated rich experience in technology and service for product sales, dedicated to providing users with a more comprehensive solution. At present, our company developed countries all kinds of cutting tools and drill grinding equipment, can provide the most suitable products for different users, and provide a full range of technical advisory services; in Beijing the tool service center, Tianjin and surrounding areas provide manufacturing the overall carbide tool, the overall alloy bit and non standard cutting tools and grinding; also has more than 10 years of machine tool manufacturing and development experience of our company, development and production of BT150 series diamond tool grinding machine, universal tool grinding machine and BT560 type tool detection instrument, tool grinding machine CNC transformation and tool grinding application software. In 2016, we established a complete machine tool manufacturing and production base in Jing’an County, Jiangxi Province, and established Jiangxi Geqi Grinding Technology Co., Ltd. and Jiangxi Demina Precision Machinery Co., Ltd. And based on this, we trained the training of cutting talents.

Ⅱ.Our Factory

Our factory has a total investment of 122.8 million yuan, covers an area of nearly 50 acres, of which the construction area is 23,466 square meters, with 1 office building, 2 warehouses, and 4,000 square meters of scientific research and living complex.

As an industry leader in the development and manufacture of tool grinding machines, Demina Manufacture Center has decades years of abundant experience in designing ability and professional manufacturing architecture. The center not only is a leading provider of PCD tool grinding machines and tool analyzers, but also provides the services such as CNC transformation of manual controlled tool grinding machines, the repairing of CNC tool grinding machines, the upgrading of controlling system, the updating of software and so on.

Ⅲ.Our Products

4-Axis CNC PCD Tool Grinder BT-150D

The machine is suitable for massive production of carbide insert, PCD and CBN insert. Once centering is finished, grinding will be done automatically. The even consumption of grinding wheel can be measured and compensated by the system, so production with long cycle time can be measured.

Main Technical Parameters:
The diameter of the Grinding wheel150mm
Direct Drive Spindle with Water Cooling3KW
RPM of Grinding Spindle0~3,000RPM
Changeable Clearance Angle-5°~25°
Max Magnification of Optical Microcope4 times
Industrial PC and Display15 “
Magnification of CCD Measuring System100times
Coolant Tank with Filter Paperabout70L
Electrical Supply12Kw
Voltage  Requested380V/Three phrace/50Hz
Weight With Coolant Tank2000Kg

BT-150J Superhard Tool Grinding Machine

BT-150J PCD Tool Grinder is reliable in performance and easy to be operated. It requests very little manual skill. The swinging of grinding wheel controlled by PLC is smooth and without reverse vibration. Without wheel handles it is easy to control the swing range, frequency, and swing position by pushing the button. The machine using ‘rapid feed’ and ‘precision feed’ to finish rapid feed/retraction (0.5mm/turn) and work feed(3mm/turn). This assures the production efficiency and feeds precision.

Main Technical Parameters:
1The diameter of the Grinding wheel150mm
2Direct Drive Spindle with Water Cooling3KW
3RPM of Grinding Spindle0~3000RPM
4PLC Numerical Controlled Oscillation and Control on the Panel
5Max. Oscillation Range30mm
6Max. Oscillation Frequency60times/minute
7Quick approach withdraw and precisely feeding3mm/turn


8Feeding Resolution0.001mm
9Magnification of CCD Measuring System100times
1015 Industrial Displayer15”
11Electrical Supply12Kw
12Voltage  Requested380V/Three phrace/50Hz
13Compressure of Air Braking on Rotation Axis6bar

Drill Grinding Machine BT-40

Drill, tap, countersink cutter and step drill can be ground on BT-40 without extensive training. The vertical grinding wheel makes web thinning very easy. Six-jaw chuck with high accuracy guarantees the run-out a drill deserves.

APE40 Technical Data:
Sharpening diameter2~40mm
Point Angle40°~180°
Horizontal wheel spindle power0.76KW
Vertical wheel spindle power0.18KW
Wheel speed3380 RPM

BT-560 Tool Analyzer

The analyzer is used for measuring the geometric elements(such as the diameter, radius, and the cutting edge angle) of drills and cutters. It makes use of the tool microscope and CCD camera to magnify the image and realize the real-time display, and the operating lever and electronic handwheel to set the measurement position quickly and precisely.

BT-150E 5-Axis CNC Tool Grinding Machine

BT-150E 5-Axis CNC Tool Grinder is equipped with special CNC system, with tool grinding application software based on Windows XP. It can grind drills, end mills, and ball nose of HSS and carbide. All the programs can be saved, copied, renamed and modified. Before starting grinding the tool, 2D simulation can be made and confirmed, so proper adjustment is possible.

Technical Data:

Work Head Frame

Hydraulic chuck BT 40
Tool Diameter Range3-25mm
Maximum of Tool Length200mm
Maximum of Tool Diameter125mm
Wheel Center Hole20mm
Number of Wheel1-3
Spindle Power5KW
Max.of Wheel Speed6000rpm
X-Axis Longitudinal Traverse360mm
Z-Axis Vertical Traverse180mm
Y-Axis Horizontal Traverse190mm
A-Axis TraverseEndless
W-Axis Traverse0~200°
The accuracy of Linear Axis0.001mm
The accuracy of the Rotary Axis0.001°
Maximum of Linear Axis Feed Rate15m/min
Maximum of Rotary Axis60rpm
Controlling System5-axis control system of Germany Beckhoff
Measuring SystemData Encoder
Main Power380V
Voltage of Power10kw

Ⅳ.Product Application

The production of BT150 series diamond tool grinding machine is suitable for massive production of carbide inserts, PCD and CBN inserts.

Ⅴ.Our Certificate

1. 150B 2-axis CNC diamond tool grinding machine won the Beijing New Technology and New Product Certificate
2. 150D 3-axis CNC diamond tool grinding machine won the Beijing New Technology and New Product Certificate
3. Beijing Demina Precision Machinery Co., Ltd. obtained the high-tech enterprise certificate
4. Beijing Demina Precision Machinery Co., Ltd. obtained Zhongguancun High-tech Enterprise Certificate
5. First Prize of the 6th China Innovation and Entrepreneurship Competition in Jiangxi Province
6. The Excellence Award in the Advanced Manufacturing Industry of the 6th China Innovation and Entrepreneurship Competition in 2017
7. In 2018, the first prize of the entrepreneurial group of the first “Creation of the Beautiful” Entrepreneurship Competition in Yichun, Jiangxi
8. Mr.Shu Zhiyong -the general manager of Demina Precision was selected as a leading entrepreneurial talent in the “Double Thousand Plan” of 2018 in Jiangxi Province.

Some Certificate pictures are as follows:

Ⅵ.Production Market

Our products are based on the Chinese market. And our customers include more than 20 provinces, municipalities and autonomous regions in China, and are exported to the United States, Mexico, Turkey and Japan, South Korea, Malaysia, Thailand, India, Singapore, Southeast Asia, and other countries.

Ⅶ.Our Service


Proactively provide the relevant information of our products to customers, give some suggestions to customers to purchase the machine that best suits their needs, and masters the machine ’s use and maintenance methods.

On-sale Service:

Respect customers and provide the best service.
Provide product technical consultation for users; confirm what they need and provide complete solutions for users.


We will follow the tracks of the whole process of product service and quality, pay full attention to customer complaints and suggestions, promptly feedback market information, make timely adjustments and immediately return products that cause quality problems to us, so that the company’s product quality and The service level is constantly improving and better serving the majority of users.

Hot Products
Hot News
  • 12

    PCD Metal Cutting Tools Introduction

    PCD metal cutting tools can use PCD materials with high hardness, high wear resistance, high thermal conductivity, and low friction coefficient to achieve high precision, high efficiency, high stability, and high surface finish of non-ferrous metals and wear-resistant non-metallic materials. This kind of tool from the structure can be divided into welding PCD tool and indexable PCD blade.In recent years, PCD tools with standard shank have developed rapidly, such as PCD milling cutter with shank, PCD boring cutter, PCD reamer, etc. The tool shank types are mainly cylindrical shank, taper shank, and HSK shank. This kind of tool (especially the multi-tooth tool) is characterized by the cutting edge of the shank runout small (such as the blade length of 30mm HSK handle PCD milling cutter cutting edge runout is only 0.002mm), especially suitable for a variety of non-ferrous metal parts of the forming surface, hole, step hole and other large quantities of high-speed processing. For example, the PCD high-speed milling cutter with aluminum matrix cutter head (six edges, diameter 100mm), the maximum speed can reach 20,000R/MIN, above, the cutting speed can reach 7,000M/MIN, suitable for forming surface processing of automotive parts.The indexable PCD blade is made by inlaying a PCD knife blank on the indexable carbide blade and then grinding it. It can be clamped on the cutter bar, cutter holder, or cutter head of various CNC machine tools and used for high-reliability mass processing. With the increasing popularity of CNC machine tools, machining centers, and automatic production lines, the use of indexable PCD blades is more and more, and the tool’s durability can be improved dozens of times compared with carbide tools.(2) PCD woodworking toolsPCD woodworking tools can be divided into PCD saw blades and PCD shaped woodworking milling cutter two categories.PCD saw blade is to weld the PCD blade blank on the saw blade matrix and then warpThe structure of the PCD saw blade is similar to that of the carbide saw blade after grinding. The difference is that the front Angle of the PCD saw blade is smaller than that of the carbide saw blade, generally, 5° ~ 10°, wedge Angle 65° ~ 75°, the size of the saw blade is generally from 100 to 450mm, and the number of sawteeth can be up to 72 teeth.The main varieties of PCD forming woodworking milling cutter are used for processing Al2O3 layer of laminated wood floor trimming knife, PCD groove knife, PCD furniture forming knife, etc. Its processing method is the shape of PCD cutting tool one-time copy (or combination) to be processed wood. The cutting speed of PCD forming woodworking milling cutter can reach 3,000m/min, and the cutting volume can reach several meters per minute. The cutter’s durability is dozens or even hundreds of times that of carbide cutting tools. Because of its high efficiency and high durability, it is especially suitable for mass processing.

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  • 12

    Why To Chose PCBN Metal Cutting Tools

    PCBN metal cutting tools can also be divided into welding PCBN tools and indexable PCBN blade two categories.Welding type PCBN tool is the PCBN insert blank welded on the steel matrix by grinding, mainly turning tool, boring tool, reamer, and so on. PCBN tools are mostly used for wear-resistant ferrous metal processing, so the tool Angle can not be too small, the tool rectangle is generally -5° ~ 5°, the back Angle is generally 3° ~ 10°, intermittent cutting is generally negative chamfering.PCBN insert of transposition structure (mainly for the lathe tool and milling tool) is generally in a corner of the transposition cemented carbide blade inset welding a PCBN insert blank, by grinding. In consideration of the more expensive and regrinding knife blank and other reasons, generally only made of a knife tip. With the improvement of welding process quality, the shear strength can reach 0.78kg/m². With the PCBN insert blank size smaller and smaller, not regrinding PCBN blade price also decreases. Because PCBN tools have high wear resistance and long life, it is also ground for many times, many customers like to choose PCBN metal cutting tools for product processing.It needs a tool grinding machine for grinding PCBN inserts. Beijing Demina PCBN tool grinding machine can grind and regrind PCBN cutting tools with high efficiency.

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  • 12

    Grinding Procedures Of BT-150N Tool Grinder

    Grinding Procedures Of BT-150N Tool GrinderAt first, set the grinding wheel inclination as the second clearance angle (normally from 0°to 18°), and turn the rotary table at a proper position so that the left cutting edge parallel to the X-axis of the hairline on the video displayer. That is the cutting edge parallel to the grinding wheel end face. Turn the fast feed handwheel to move the tool immediately in front of the grinding wheel end face, and then feed forward with figures screwing the micro feed wheel. The grinding wheel is removing the PCD&CBN material until you stop. Try it one or more times until the new cutting edge appears. Do the same to the second cutting edge.Secondly, center the tooltips again by turning the two handwheels on the cross worktable. Drive the grinding wheel quickly forward until the PCD&CBN tool is near to the grinding wheel, and then feed ahead while swinging the rotary table. Radius cutting tip is forming gradually. As soon as the radius cutting edge coincides with the two linear cutting edges stop the feeding. Finally, set the grinding wheel inclination as the first clearance angle (normally from 5 ° to 8 ° ), do the same to the tools so that a very narrow flat (roughly 0.02mm thickness) comes into being on the cutting edge. The way described above is a normal method, and a special and more reasonable method is highly encouraged and reported to Demina precision. Special fixture design and even emendation to the machine will be considered by Demina as innovation.

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  • 12

    China And Foreign PCD Cutting Tool Grinding Machine

    There are three foreign main types of special machine tools used for machining superhard cutting tools:(1) Foreign PCD cutting tool grinding machine toolsThis kind of machine tool in Swiss Ewag RS series of knife grinder are representative of the company, the grinding machine can use ceramic bond diamond grinding wheel grinding sharp and pressure to PCD, PCBN and natural diamond tool grinding, characterized by good rigidity, machine tool with a projection measuring device, is currently the most widely used abroad superhard cutting tool grinding equipment. Similar products and Japan Osaka diamond company, the United Kingdom COBOM company manufacturing PCD cutting tool grinding machine.At present, PCD cutting tool grinding technology is constantly improved, such as the constant pressure produced by the spring to pneumatic pressure, and can be adjusted in the range of 0 ~ 300N, to adapt to different grinding objects. For the convenience of controlling the grinding size, the scale of the grinding machine is equipped with a digital display device. Taiwan Yuanshan Company changed the projection screen and other optical devices of the original grinding machine into a high-precision camera system. With a precise measurement scale, the grinding size can be displayed and controlled on the monitor, and the online measurement can be realized without stopping the machine. The camera magnification can be adjusted from 15 to 120 times, and the circular arc of the edge tip of R0.05mm can be ground.(2)China Famous brand PCD tool grinderDemina has produced PCD tool grinding machines for ten years. They have main three models for sale. BT-150H is a manual type. BT-150H is Semi-automatic. BT-150D is an automatic tool grinding machine. They are all can grind PCD tools with high quality. The base of the machine is made of solid casting with high quality. The main component’s weight is about 1.6 tons. It has online CCD Measurement using the optical microscope and CCD camera, the magnification is 25~80 times. The grinding wheel oscillation is controlled by the PLC program and move very smoothly. The swing range is between 0 to 30 mm. The stable tool grinder can meet many standards and non-standard PCD inserts grinding.

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