News

Cryogenic treatment 1. -196°C ultra-long cryogenic treatment transformed nearly all residual austenite into martensite; 2. Precipitated nano-sized carbide particles increase hardness and toughness; 3. Improve the dimensional accuracy, wear resistance and impact toughness of the product; 4. Enhance the internal stress distribution of the product and increase the fatigue strength; 5. Improve the corrosion resistance of the workpiece. Thermal Treatment Long stereotyped thermal limitation removal of grinding residual stress

CBBT collet chuck is BT taper collet chuck`s end face and taper double contact with spindle. The double face contact design is mainly to improve the rigidity, stability and precision of the tool holder. Increase the stability of the tool holder during high-speed machining; Reduces the phenomenon of poor accuracy caused by tool holders during high-speed cutting; Larger contact diameters help increase the number of extensions; Improved tool stability can increase tool life, ensure repeatable positioning accuracy after tool change, and improve boring Roundness during hole cutting. Based on the mechanics theory, the larger the diameter of the reference point, the stronger the rigidity. The common system is the standard diameter of the taper shank end diameter; the benchmark BBT diameter is the flange diameter, which significantly improves the rigidity.

Chongde have been in CNC machine accessories industry for 15 years. We are serving 0.005mm and 0.008mm high precision collets and 0.002mm precision BT/CAT/HSK/NMTB-ER/SK Tool Holders etc. Comprehensive inspection way of chuck 1. 7:24 taper precision ≤AT3 and part of the standard size are tested by Diebold standard inspection tools which made in Germany; 2. Surface of the clamping inner hole of grinding by high speed Inner-aperture grinder, and inspect by standard pneumatic measurement instrument; the big and contact area rate is above 90%; 3. Shank thread is inspected with 4h level thread ring gauge, and the nut is inspected with 4H level thread plug gauge, the quality is guaranteed; 4. Run out of the inside shank cone: ≤0.002 (The length of the shank 100L); 5. Coaxiality 5μ: Shank run out ≤0.002; Equip collet ≤0.005, the highest comprehensive run out point is no more than 0.005mm; 6. Dynamic balance: We can do G2.5 30000-50000rpm according to clients` demands. The appearance of CSK high speed chuck: Nickel coating and polishing: 1. The roughness of surface has been reduced to improve the stability of the precision. The bumpy surface get smooth after polishing, the pore, scratch and other flaw has been filled so as to improve the endurance. 2. The polishing process doesn`t influence precision. The surface of the polished tool handle is treated with nickel-phosphorus plating. The thickness of the nickel layer is even and the chemical fluid spitting degree is almost 100%. This special coating can prevent the abnormal wear of the spindle and does not affect the accuracy of the product. 3. The endurance has been improved. The abrasion of nickel is strong. It has a good effects of anti-rust in different medium environment. 4. The appearance of tool holder is smooth and bright, feels comfortable.

The design of the convex plate in front of the CSK collet can prevent dust and chip getting into the collet when processing, prolong the collet service life. Surface of CSK collet employ the [environmental protection"-special coating surface treatment, improved the hardness and endurance of the collets` surface. The collet tend to be cleanness better, accuracy stable, and the surface more smooth, antirust, feel comfortable and appearance nice. Furthermore, the precision grinding for inner hole, outer circle and end face up to Ra0.4. And the cone angle of CSK collet is designed as 8°that improves the clamping force and anti seismic performance. Comprehensive features of CSK High speed collet: 1. Japanese Material: JIS-SUJ2; 2. Hardness: 46-50 HRC; 3. Nickel coating surface: - Antirust; -Improve the hardness and endurance of the surface; -Cleanness better, Accuracy stable; -Surface more smooth, feel comfortable, appearance nice. 4. Cryogenic treatment: (1).-196°long cryogenic, nearly all of the residual austenite into martensite; (2).Carbide precipitation of Nanoscale particles, increasing the hardness and toughness; (3).Reducing residual stresses; (4).Wear resistance significantly improved. 5. Thermal aging processing Removing of residual internal stress by super-long heat aging. Comprehensive features of CSK –C type (Oil Hole type) High speed collet: 1. Japanese Material: JIS-SUJ2; 2. Hardness: 46-50 HRC; 3. Using the difference of grooves to reach round sealing and only central water discharge; 4. Apply to clamp he central water discharge cutter; 5. Non-standard holes can be customized.

Chongde have been in CNC machine accessories industry for 15 years. We are serving 0.005mm and 0.008mm high precision collets and 0.002mm precision BT/CAT/HSK/NMTB-ER/SK Tool Holders etc. The advantages of HSK milling tool holder. 1. HSK series collet chuck is using following material : JIS-SCM415 or 20CrMnTi, which has high stability and elasticity; 2. The hardness is : 56-60HRC; 3. The carbon depth is :>0.8; 4. The inner hole, excircle and end face are super finish ,through hardened and ground Ra0.4; 5. High Precision HSK shank Tool Holder ,balanced G6.3 or G2.5 For choose, can be G2.5 30000 rpm or G6.3 12000rpm; 6. The nickel coating surface increasing the service life of collet and ensure full functionality and precision. We are specializing in the production of HSK milling tool holder, we can to figure to sample processing, and perfect after-sales service and technical support. Looking forward to your cooperation!

Chongde have been in CNC machine accessories industry for 15 years. We are serving 0.005mm and 0.008mm high precision collets and 0.002mm precision BT/CAT/HSK/NMTB-ER/SK Tool Holders etc. High Precision ER COLLET DIN6499, also known as spring collet, is mounted on a drill \ milling machine, drilling and milling chuck, its function is to clamp drill cutter or knife. ER flexible collet is currently the most used. It has stable performance and high accuracy by the majority of manufacturers trust. All products are precision grinding, in line with the German DIN 6499 specifications precision manufacturing. High precision collet chuck combines advantages of DIN6499/ISO15488A standard and B standard. High speed cutting such spring collet is mainly applied to the need for good in the radial runout error. Features of ER series tool holder The advantages of ER collet. 1. ER collet is using the Japanese material: JIS-SUJ2, which has high stability and elasticity; 2. Hardness: 46-50HRC; 3. The Undercut of collet adopts the grinding process, which is more suitable for high-speed processing; 4. The inner hole, excircle and end face are super finish ,through hardened and ground Ra0.4; 5. The nickel coating surface increasing the service life of collet and ensure full functionality and precision.

Shandong Chongde Precision Machinery Co.,LTD is the manufacturer that specializing in producing high precision CNC machine tools and machine tool accessories. Our company have been in this industry for over 15 years, our product have really great precision and using life. We can serve 0.005mm and 0.008mm accuracy collets and 0.002mm precision BT/CAT/HSK/NMTB-ER/SK Tool Holders etc. Features of ER series tool holder 1. Taper precision ≦AT3 and part of the standard size are tested by Diebold standard inspection tools which made in Germany; 2. Surface of the clamping inner hole is grinding by high speed Inner-aperture grinder, and inspect by standard pneumatic measurement instrument; the big end contact area rate is above 90%; 3. Shank thread is inspected with 4h level thread ring gauge, and the nut is inspected with 4H level thread plug gauge, the quality guaranteed; 4. Run out of the inside shank cone: ≦0.002(At the length 100L of the shank); 5. Coaxiality 5μ: Shank run out ≦0.002; With collet ≦0.005, the comprehensive run-out of the shank is no more than 0.005. 6. Dynamic balance achieve: G2.5 20000-50000RPM. The advantages of ER series collet chuck. 1. With high speed, high Precision, high durability. Good surface finish ,and antirust nickel plating .Balanced G6.3 or G2.5 for choosing .with DIN6499 collet ,can be straight shank cutter clamping various sizes; 2. High heat resistance, high toughness, high wear-resistance, special use for high speed cutting of CNC milling machine, also can increase the smoothness, reduce the rubbing coefficient and improve the efficiency save more production time. 3. BT Tool Holders for mechanical spindle and cutting tool and other accessory tool connection. Is a simple, popular spindle shank connection standard, mainly BT30 BT40 BT50... Etc. Mold industry, and high-speed engraving machine, used more .At present the main traditional CNC Machine tool accessories standard BT Tool Holder. 4. We can to figure to sample processing, and perfect after-sales service and technical support.