Selection path 1: standard geometry and size range
For many purchasing teams, the fastest starting point is a DIN 2093 or catalog-style size direction. Outside diameter, inside diameter, thickness and free height help identify whether a standard disc spring or Belleville washer family can fit the assembly.
This path is useful when interchangeability, quick replacement, sample confirmation and repeat purchasing matter more than a fully custom load curve.
- Check DIN 2093 or similar standard geometry first.
- Confirm OD, ID, thickness, free height and available installation height.
- Use the catalog as a starting point, then verify load, travel and stack behavior.
Selection path 2: material and service risk
Material should be selected against the failure mode. Spring steel may be the best value in controlled service, stainless steel may be needed for corrosion, and nickel alloys or Hastelloy may be justified when heat, severe media or long maintenance intervals dominate the decision.
For severe service, the right material is not the most expensive grade by default. It is the material that can keep usable preload under the actual temperature, media and cycling profile.
- Spring steel: high force and cost efficiency in controlled environments.
- Stainless and precipitation-hardening stainless: corrosion resistance with spring performance tradeoffs.
- Inconel, Hastelloy, Nimonic and titanium: severe-service review where ordinary steels lose confidence.
Selection path 3: stack design and calculation screening
Once a single spring direction is close, stack design decides whether the assembly needs more force, more travel or both. Parallel stacking increases force, while series stacking increases travel. Mixed stacks require height, guidance and friction review.
FeTech uses calculation as a screening tool before quotation. Fatigue life, K4 geometry source, friction, support face condition, material state and installation details still need engineering review before final release.
- Use parallel stacks when the force target is too high for one disc.
- Use series stacks when the required travel is larger than one disc can provide.
- Use calculation results as RFQ preparation, not as final certification.
Selection path 4: RFQ data package
The strongest RFQs include drawings, target load, working deflection, material expectation, stack arrangement, operating temperature, media, cycle or maintenance expectation, quantity and approval requirements.
This information lets FeTech decide whether the next step should be standard selection, material upgrade, stack calculation, sample confirmation or custom production review.
- Send dimensions and available installation space.
- Send target load, working deflection and load tolerance if known.
- Send service environment, temperature, corrosion media and failure consequence.
- Attach drawings, photos or completed RFQ worksheets when available.
よくある質問
Should disc spring selection start from a catalog or from a calculation?
For standard purchasing, start from the catalog or DIN 2093 size direction, then use calculation to check whether the load and travel are realistic. For severe-service projects, material and failure risk should be reviewed at the same time.
What information makes a disc spring RFQ easier to quote?
The most useful inputs are OD, ID, thickness or available space, target load, working deflection, stack idea, material, temperature, media, quantity, drawings and the consequence of preload loss.
When should a buyer move from standard DIN 2093 to custom disc springs?
Move to custom review when the standard size cannot meet load, travel, installation height, material, fatigue or severe-environment requirements with enough engineering margin.
FeTech に皿ばね用途の確認を依頼しますか？
図面、積層スペース、目標荷重、温度、媒体、数量を送付してください。材料方向、積層ロジック、見積準備度を確認します。
- DIN 2093 置換または特注形状
- バルブ、フランジ、アクチュエータ、過酷用途の積層
- ステンレス、Inconel、Hastelloy、チタン、耐熱鋼の材料確認
最終形状、疲労寿命、K4 根拠、摩擦、支持面条件は技術確認が必要です。