Products FAQ

  • Do you handle “heavy load” spring pins defined by JIS?

    Spring Pins for heavy loads are not available. Standard products are designed primarily for general use and light loads, with options available in spring and stainless steel.

  • When assembling the retaining ring, is there a specific orientation to consider, given that it has a shear droop side and a burr side?

    It is suitable for use in either assembly direction. If you plan to use it under heavy loads, we highly recommend verifying the most suitable way and specifying the assembly direction to our customers.

  • Can you provide information or guidance related to environmental surveys, certificates of origin, product surveys, and similar topics?

    We are available to address your inquiries, but kindly use the same channel you utilized for your purchase. Please review the available topics for standard products.

  • I would like to receive the load curve data for the wave washer.

    If you provide us with the size, we will send you the data. If required, we can also send sample products.

  • I’m interested in understanding the range of expansion or contraction when installing C-Type retaining rings for both shafts and holes.

    JIS standards also stipulate limitations, with both allowing for up to 1% of the nominal diameter for expansion or contraction. Beyond this range, there is a risk of potential permanent deformation and dislodging from the groove.

  • Is it feasible to make custom shapes and sizes beyond the standard product offerings?

    Yes, it is possible. Upon verifying the specified conditions, we can suggest a customized shape. Subsequently, we will create a prototype, and if the customer’s evaluation results are satisfactory, we will proceed with mass production.

  • Are C-Type retaining rings for shafts and holes made of stainless steel?

    Although we manufacture some custom products made of stainless steel, we do not have standard products made of stainless steel.

  • I would like to have the drawings, and can I also have the CAD data?

    We do not provide CAD data.

  • Your catalog mentions “steel for springs,” but could you please provide more details about the specific material grades used?

    Generally, it is S60C (M) to S70C (M) or SK85 (M) or SWRH62 (A/B) to SWRH72 (A.B) or equivalent.

  • Is material you use made by overseas manufacturers?

    Material we use is all made in Japan.

  • Where are Ochiai products manufactured?

    The country of production differs depending on the products, so please contact us for each product.

  • Are dish springs load-controlled?

    Our dish springs are subject to dimensional control, but not load control.

  • What is the difference between a wave washer and a wave washer for bearings?

    The standard wave washer is a dimensionally controlled product, whereas the standard wave washer for bearings is a load-controlled product, and it includes the relevant bearing number in its product name. The shape and manufacturing method are identical for both, so please select the appropriate one based on your specifications. Customized wave washers will be controlled based on specifications requested by customers.

  • Will it be lower than the initial height once you use the wave washer?

    When a wave washer is utilized even once, it will flatten, resulting in a reduced height. If there is variation in the set height during use, or if the working height differs between the initial setting and assembly, it’s important to take into account the load after the initial setting.

  • Why is the wave washer’s calculated load value and actual load different?

    The calculation formula does not take plastic deformation into account, and the correlation of compression and load comes out as a straight line, which is a plastic deformation. The actual load characteristics will be a curved line affected by a plastic deformation.
    For standard products, please refer to the load curve graph. If you need a load curve graph, please request us through the inquiry form.
    We recommend making a prototype and verifying the calculated values for customized products.

  • What kind of heat treatment is applied to spring steel products?

    Our products, both manufactured at our local factory and at our domestic and international group factories, undergo austempering heat treatment.

  • What kind of surface treatment do you use for the spring steel products?

    Most of our spring steel products are either phosphate-coated or zinc-plated with trivalent chromate, depending on the specific product. Other surface treatments, such as Nickel plating, Chrome plating, or other alloy plating are available as we outsource to our suppliers.