Carbide Spot Drill for Cast Iron and Aluminum Alloy Machining-Changzhou Maiteng Tools Co.,Ltd.

• Suitable for drilling center holes and chamfering on CNC machine tools.
• Compared with general center drilling tools, the spot drill is more stable and can be easily used for spot drilling on inclined surfaces.
• Externally cooled straight shank spot drill

NNZL Series Centering Drill (External Cooling Type)——Central Location

Processed Materials	Cast Iron		Nodular Cast Iron		Silicon Aluminum Alloy				Heat-Resisting Alloy
Processed Materials	Cast Iron		Nodular Cast Iron		Si≤10%		Si>10%		Heat-Resisting Alloy
Cutting Speed	60~120m/min		50~100m/min		100~180m/min		80~140m/min		120~200m/min
Diameter (mm)	Rotational Speed (min-1)	Feed Rate (mm/r)	Rotational Speed (min-1)	Feed Rate (mm/r)	Rotational Speed (min-1)	Feed Rate (mm/r)	Rotational Speed (min-1)	Feed Rate (mm/r)	Rotational Speed (min-1)	Feed Rate (mm/r)
5	6400	0.09~0.14	5100	0.09~0.14	9000	0.12~0.25	7600	0.12~0.25	10000	0.12~0.25
6	5300	0.12~0.16	4200	0.12~0.16	7400	0.14~0.28	6400	0.14~0.28	8500	0.14~0.28
8	4000	0.13~0.20	3200	0.13~0.20	5600	0.18~0.32	4800	0.18~0.32	6400	0.18~0.32
10	3200	0.17~0.25	2500	0.17~0.25	4500	0.22~0.36	3800	0.22~0.36	5000	0.22~0.36
12	2700	0.20~0.30	2100	0.20~0.30	3700	0.25~0.40	3200	0.25-0.40	4200	0.25~0.40
14	2400	0.22~0.32	1800	0.22~0.32	3200	0.27~0.44	2700	0.27~0.44	3600	0.27~0.44
16	2000	0.24~0.34	1600	0.24~0.34	2800	0.32~0.48	2400	0.32~0.48	3200	0.32~0.48
20	1600	0.28~0.40	1300	0.28~0.40	2300	0.40~0.60	1900	0.40~0.60	2550	0.40~0.60

1. This cutting condition table is applicable to center positioning machining.
2. When using this tool for the first time, test cutting at 90% of the cutting speed or 85% of the feed rate according to the above data. When the cutting condition is stable, increase the cutting speed and feed rate one by one.
3. This standard cutting condition table is applicable to water-soluble cutting fluids.
4. When performing center positioning on inclined surfaces and curved surfaces, please reduce the feed rate.
5. When installing the cutting tool, please use a defect free and clean chuck, and control the radial runout of the drill bit within 0.02mm.

The NNZL series spot drill features a unique geometric design, optimizing the cutting angle for precise center positioning. This reduces cutting resistance and tool wear while ensuring superior operational stability. The external cooling design enhances chip evacuation, reduces cutting heat, and improves machining efficiency.

Manufactured using high-performance carbide material with precision coating technology, this tool offers excellent wear resistance and thermal stability, making it ideal for demanding, long-duration machining tasks. Advanced manufacturing processes ensure a sharp cutting edge, resulting in smooth cutting, improved surface finish, and fewer machining defects.

The NNZL spot drill is available in a wide range of diameters and lengths, allowing for flexible combinations to accommodate various machining environments. Whether for standardized production or customized applications, this tool delivers high-efficiency and precision solutions.

Designed for machining cast iron, ductile iron, and aluminum alloys (including varying silicon content), the tool adapts to different cutting speeds and feed rates to ensure stable performance.

For optimal use, an initial trial run is recommended at 90% of the suggested cutting speed and 85% of the recommended feed rate. Adjustments can be made once a stable cutting condition is achieved. Additionally, ensure proper tool installation with a concentricity accuracy control within 0.02mm to maintain machining precision.

Changzhou Maiteng Tools Co.,Ltd.is located in the economically developed Yangtze River Delta region.The factory is located in XixiashuHigh-tech Development Zone,a well-known tool town in China.It is adjacent to S239 and Jiangyi Expressway in the east,25kilometers away from Changzhou North Station of the high-speed railway, and G42 Shanghai-Nanjing in the south.High-speed,8 kilometers away from Changzhou Benniu International Airport,the transportation is very convenient.
Magotantools take the ISO9001 quality system as the standard,under the guidanceof the business philosophy of"zero defect in products"and"zero distance in service",based on the spirit of"integrity","unity"and"exploita- tion",and follow a fair and just company style for management.Product production adopts five-axisand six-axis CNC grinding and machining centers from Germany,Switzerland,Japan,etc.,and is equipped with high-preci- sion testing equipment such as Germany,Japan,and China,so as to meet the needs of production with high quality and quantity.
The company's team consists of 2 professor-level senior engineers in China,and has more than ten experienced tool technology and R&D personnel.It has formed a long-term cooperation model with East China University of Science and Technology,and continuously develops various high-performance CNC tools,and has won various national awards.More than 10 patents,the company's products are mainly used in the defense industry, aerospace industry,automotive industry,electronic products and molds and other fields.
The company's various products are recognized and favored by well-known domestic companies.With infinite technology,infinite creation,and pursuit of excellence,Magotan tools will write future prosperity and dreams with more extraordinary confidence and high-quality quality.

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