A special inner diameter combining key grooves, notches, and D shapes. We also check the angles between the grooves and their positional relationship with the reference.
At Hanshin Seiko Co., Ltd., we offer wire cut electrical discharge machining for through irregular holes, including key grooves, notches, D shapes, and multiple grooves. Please consult us for special single items or prototypes with unique inner diameters that are difficult to process with standard tools, as well as for additional machining on existing holes. We confirm the overall contour of the inner diameter from drawings and CAD data, reflecting the positional relationship with the hole center, outer reference surfaces, mounting holes, and other features into the machining data. For opposing two grooves or multiple evenly spaced grooves, we also check the groove width, depth, and angular position. We will consider adding key grooves or changing the inner diameter contour on parts after hardening, depending on the material, hardness, and required precision. For additional machining on existing holes, we will verify the current shape against the finished contour and check if there is enough material remaining for processing. For stop key grooves and bottomed irregular holes, we can also provide information on alternative methods such as shape cutting electrical discharge machining.
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basic information
■Target shapes: Keyed holes, D-shaped holes, notched irregular holes, multiple grooves, asymmetric inner diameter contours ■Main processing method: Wire cut electrical discharge machining ■Processing conditions: Through shapes that allow wire passage ■Target materials: Conductive materials. Hardening materials can also be consulted ■Verification items: Hole dimensions, groove width and depth, inner corner radius, angles between grooves, positional relationship with outer circumference and other holes, tolerances, surface roughness ■Manufacturing conditions: Single items, prototypes, additional processing to existing holes *If the hole is through but the groove stops halfway, a different processing method will be considered. *Processing feasibility and accuracy will be individually confirmed based on the drawings and the current state of the workpiece.
Price information
We will provide a customized estimate based on the material, work dimensions, inner diameter shape, required precision, and quantity. For additional processing, please provide documentation that shows the current hole dimensions and the final shape.
Delivery Time
※It varies depending on the processing shape, quantity, and condition of the supplied items. Please contact us with the planned supply date and your desired delivery date.
Applications/Examples of results
【Applications and Consultation Examples】 ■ Addition of key grooves or notches to round holes ■ Machining of opposing two grooves or multiple evenly spaced grooves ■ Special inner diameter processing for D-shaped or asymmetrical designs ■ Angle specification processing based on the outer surface or mounting holes ■ Additional inner diameter machining for parts after hardening ■ Single items or prototypes with shapes that are difficult to handle with standard tools For complex contours, please provide CAD data such as DXF along with PDF drawings.
Company information
Hansei Seiko Co., Ltd. is a precision metal processing company founded in 1948, based in Kobe City, Hyogo Prefecture. We offer integrated processing services centered around wire cut electrical discharge machining, shape electrical discharge machining, and fine hole electrical discharge machining, as well as machining, polishing, finishing, and measurement. We welcome inquiries for precision parts, mold components, jigs, test pieces, and more, whether for single items, prototypes, or small lots. In addition to processing hardened steel, carbide, and stainless steel, we also handle contour machining of thick parts, key grooves, fine slits, and complex shapes. We confirm material, shape, required precision, and application, and consider processing conditions and processes. This reduces the burden of arranging multiple processing locations and supports part manufacturing. Based on the principle of "making according to the drawings," we conduct inspections and measurements in-house to confirm the finish before shipping. Based in Kobe and Hyogo, we accept processing inquiries and quotation requests from across the country. If you have parts you are struggling to process or drawings for which you would like to consider methods and processes, please feel free to consult with us. https://www.hansei.co.jp/
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