NK精工（エヌケイ精工） List of Products and Services

At N.K. Seiko Co., Ltd., we are capable of machining complex shapes using a 5-axis machining center. We strive to improve dimensional accuracy, durability, and stability, while also ensuring we can provide short delivery times. 【Examples of Complex Shape Machining】 ■Material: SUS303 ■Machining Size: Outer Diameter Φ30×T37mm Block Size 0.8×0.8mm, Block Pitch 0.9mm On the side of the drum shape, square pyramids of size 0.8×0.8 are arranged with a pitch of 0.9mm, and finishing was done using a minimum diameter R0.1mm ball end mill. Thanks to high-speed machining at 40,000 RPM, we achieved burr-free and polish-free fine machining. (Total number of blocks: 1,067) ★Currently, we are offering a free document summarizing examples of machining with 5-axis processing! Feel free to download it from the "PDF Download" link below!

• Processing Contract

We would like to introduce examples of fine processing created by the processing machine "CEGAII-542." The high precision Z and the step difference with the previous process tool is less than 3μ. 【Examples】 ■Material: ELMAX (HRC60) ■Work size: 110×54×35mm ■Processing time: 24 hours 14 minutes *For more details, please refer to the PDF document or feel free to contact us.

• Other processing machines
• Special Processing Machinery
• others

We would like to introduce examples of fine processing made using the processing machine "CEGAII-542." It features a high-precision spindle that has no impact on depth accuracy even during long processing times. 【Examples】 ■Material: SLD-MAGIC (HRC60) ■Work size: 100×100×5mm ■Processing time: 3 hours 21 minutes ■Processing depths: 0.05mm, 0.08mm, 0.11mm ■Number of holes processed: 10,000 *For more details, please refer to the PDF document or feel free to contact us.

• Other processing machines
• Special Processing Machinery
• others

We would like to introduce an example of fine processing made using the processing machine "CEGAII-542." There is no corner rounding due to high followability in the X, Y, and Z axes. 【Example】 ■Material: RIGOR (HRC58) ■Work size: Φ32 ■Processing size: Φ0.4mm × 3mm straight pin ■Processing time: 4 hours 37 minutes *For more details, please refer to the PDF document or feel free to contact us.

• Other processing machines
• Special Processing Machinery
• others

We would like to introduce an example of direct engraving processing of hardened steel made by the machining machine "CEGA-542 (Roku-Roku)" with a performance of max 30,000 min-1. After uniformly machining the flat surface with a CBN ball end mill, it is finished at depths of 0.003 mm for the upper section, 0.006 mm for the middle section, and 0.009 mm for the lower section, with a pitch of 0.003 mm. Even with high-speed and long-duration machining, it is finished uniformly without variation in depth dimensions. 【Example】 ■ Material: STAVAX (HRC 52) ■ Machining size: 120 × 60 × 6 mm *For more details, please refer to the PDF document or feel free to contact us.

• Other processing machines
• Special Processing Machinery
• others

We would like to introduce an example of direct engraving processing of hardened steel produced by the machining machine "CEGA-542 (Roku-Roku)" with a maximum performance of 30,000 min-1. The screw shape is a fine direct engraving that connects to the outer frame with two Φ0.3mm bridges on the end face. Using a CBN ball end mill, we have achieved a burr-free and polish-free finish under high-speed processing conditions. 【Example】 ■Material: STAVAX (HRC52) ■Processing size: 20×20×6mm *For more details, please refer to the PDF document or feel free to contact us.

• Other processing machines
• Special Processing Machinery
• others

We would like to introduce an example of 5-axis machining produced by the machining machine "μV1-5X (MHI)" with a performance of max 40,000 min-1. On the side of a drum-shaped workpiece, square prisms of size 0.8×0.8 mm were arranged with a pitch of 0.9 mm, and finishing was performed using a minimum diameter R0.1 mm ball end mill. Thanks to high-speed machining at 40,000 RPM, this is a fine machining process that is burr-free and polishing-free. (Total number of blocks: 1,067) 【Example】 ■ Material: SUS303 ■ Machining size: Outer diameter Φ30×T37 mm 　　　　　　　Block size 0.8×0.8 mm, block pitch 0.9 mm *For more details, please refer to the PDF document or feel free to contact us.

• Other processing machines
• Special Processing Machinery
• others

We would like to introduce an example of 5-axis machining produced by the machining machine "μV1-5X(MHI)" with a performance of max 40,000 min-1. For three of the five machined surfaces, the Z values in the direct direction of each surface were adjusted by 5μ each, and all machining methods were performed using indexing machining. The repeatability of the indexing machining is within 2μ. The tool difference due to tool changes is within 2μ. This is a high-precision machining process that is not affected by spindle elongation during long machining times. 【Example】 ■Material: SUS303 ■Machined size: 39×39×T57mm *For more details, please refer to the PDF document or feel free to contact us.

• Special Processing Machinery
• others

Our company has a proven track record of using special steel materials tailored to various applications, including pre-hardened steel, hardened steel, powder high-speed steel, carbide, and non-magnetic steel, to manufacture molds. As an example, we would like to introduce a case of processing spring tray molds and mold components using fine direct engraving with the processing machine 'CEGAII-542'. 【Case Study】 ◎ Spring Tray Mold and Mold Components ■ Material: MAS1C (HRC52) ■ Work Size: □25mm ■ Processed Size: φ0.4mm × 3mm Straight Pin ■ Quantity Processed: 154 pieces ■ Processing Time: 40 hours 37 minutes → Achieved through a high-quality spindle with minimal runout → Significant cost reduction compared to conventional pin manufacturing *For more details, please refer to our catalog or feel free to contact us.

• Processing Contract
• Mold Design
• Other processing machines

Our company has a proven track record of using special steel materials tailored to various applications, including pre-hardened steel, hardened steel, powder high-speed steel, carbide, and non-magnetic steel to create molds. As an example, we would like to introduce a case of machining a hardened steel mobile phone cavity core using the processing machine 'CEGA-542 (Roku-Roku)' with direct engraving. 【Case Study】 ◎ Mobile Phone Cavity Core ■ Material: STAVAX (HRC52) ■ Machining Size: 150×100×30mm → Achieved no discharge by corner machining with the minimum R → Achieved no polishing by creating a uniform finishing surface For more details, please refer to our catalog or feel free to contact us.

• Processing Contract
• Plastic Mould
• Mold Design

We would like to introduce a machining case of an impeller using the 5-axis machining of the processing machine "μV1-5X (MHI)." 【Case Study】 ◎ Impeller 　■ Material: SUS303 　■ Machining Size: φ100×T62mm 　→ The finish of the simultaneous 5-axis machining section is beautiful 　→ Achieved machining with good tool life Our company strives to provide precision molds that meet customer quality requirements, particularly in improving dimensional accuracy, durability, and stability, within a short delivery time. *For more details, please refer to the catalog or feel free to contact us.

• Processing Contract
• Plastic Mould
• Mold Design

N.K. Seiko Co., Ltd. designs and manufactures precision injection molding molds using machining centers and electrical discharge machines. We strive to provide precision molds that meet customer quality requirements, particularly in improving dimensional accuracy, durability, and stability, within short delivery times. We have a track record of using special steel materials tailored to applications, including pre-hardened steel, hardened steel, powder high-speed steel, carbide, and non-magnetic steel. We continuously focus on the latest technologies and work with various industries, collaborating with dozens of partner companies that have their own areas of expertise to contribute to the development of the industry. 【Features】 ○ Isotropic and anisotropic (axial orientation and radial orientation) ○ Extreme anisotropy (from bi-polar to multi-polar) For more details, please contact us or download the catalog.

• Plastic Mould