Finishing Grey Iron Brake Drum with TNM0160604 CBN Turning Tools from Halnn Tools

1. Halnn Tools CBN Turning Tools​ Finish Machining Cast Iron Brake Drum

Relevant information indicates that the parameters of the brake drum of the car are as follows,Roundness and coaxiality tolerance ≤0.03mm,, Radial runout ≤0.05mm, ,Static unbalance ≤1.5N•cm, surface roughness≥Ra3.2.

Conventional tools are difficult to meet the market's demand for shape tolerances. In this case, Halnn superhard CBN tools can be used to not only easily meet the shape tolerance and surface roughness requirements of the brake drum, but also to efficiently process and improve production efficiency.

2. Why we Choose Halnn Tools CBN Turning Tools​ Finish Machining Cast Iron Brake Drum

For gray cast iron parts, Halnn has special superhard tool processing. The BN-S30 grade is recommended for the roughing process, the BN-S300 grade is recommended for the semi-finishing process, and the BN-K20 grade is recommended for the finishing process. Among them, BN-S30 grade and BN-S300 grade belong to solid CBN inserts, and BN-K20 grade belongs to brazed PCBN inserts.

For example, Halnn superhard tool BN-S30 grade roughing pressure vessel flange adopts SNMN120712 model, cutting parameters are: speed=450,Cutting depth (ap)=3mm,Feed rate (Fr)=0.5mm/r.

Dry cutting, a cutting edge of 410 pieces, an inserts with 8 cutting edges, equivalent to an inserts processing 3280 pieces of flange. Can see its tool strength.

3.CBN Turning Tools Characteristics

5.Detailed Data of DNML CBN Turning Tools

Type	Dimension				Standard Chamfer	Grades
	L(mm)	φI.C(mm)	S(mm)	r(mm)		BN-K1	BN-S20	BN-S200	BN-S300
TNM0160604	16.5	9.525	6.35	0.4	S01020 S02020	●	●		●
TNM0160608	16.5	9.525	6.35	0.8		●	●		●
TNM0160612	16.5	9.525	6.35	1.2		●	●		●

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6.Application Case

Compared to coated carbide inserts: the cutting speed of the Halnn superhard BN-S300 grade CBN insert is 2.8 times that of the coated tool, and the feed rate is 2 times, the tool life is 15 times for the coated tool.

Tool material	Feed Rate Fr (mm / r)	Cutting Speed (Vc) (m/min)	Tool life
Halnn superhard BN-S300 grade	0.9	280	75 pieces / edge
Coated carbide insert	0.45	100	5pieces / edge

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7.Product Certificate

Zhengzhou Halnn Superhard Materials Co., Ltd is a high-tech enterprise specializing in the production of ultra-hardened tools, and the leader of professional hard material processing tools in China and the first to research new cutting tools specific for gray cast iron, kinds of wear-resistant steel/cast steel, hardened steel materials.

The predecessor of Halnn Superhard Material Co.,Ltd is Henan Superhard Material Institute which is the earliest to make research on processing the brittle and hard materials with cubic boron nitride tools and High-Grade Diamond Tools. As the pioneer of Industry tools in China, Halnn adhere to the initial business philosophy of "Not seeking large and complete, only insist high-precision and professional". With more than 10 years experience, Halnn has researched one by one new materials grade, new technology and become the most famous cutting tools brand in superhard cutting tools industry.