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CALLOSINTERMETALL AB

Engineering support

Designed for sintering.

The earlier Callo becomes involved in the design process, the easier it is to optimise geometry, material properties, tooling and production economics. Everything on this page comes from Callo’s own design guidance — it is the conversation the company wants to have before the tool is cut.

Talk to our technical teamIs sintering right for this part?

01Start here

Make the target image clear.

When you design sinter it is very important to have your target image clear from the beginning. The questions below are the ones Callo will ask — having answers ready compresses the whole conversation.

Re-design

  1. 01

    What are your present elastic limit, hardness etc.?

  2. 02

    Do you want any new functions?

  3. 03

    Can the design be changed?

  4. 04

    Does it break today? If so, where?

New design

  1. 01

    What do you think about material characteristics, e.g. take a steel quality which you use today

  2. 02

    Where do you think it is going to be under greatest load?

  3. 03

    Describe the function clearly

  4. 04

    What degree of freedom is there in regard to other details?

02Density

Density decides almost everything.

Most of the properties an engineer cares about follow density — and high density limits complexity in design. That is the tension at the heart of every sintered part, and it is why geometry and material cannot be decided in sequence.

Density-dependent

  • Flexural strength & elastic limit
  • E-module
  • Endurance limit
  • Impact resistance & crack growth
  • Elongation
  • Apparent hardness
  • Electrical and thermal characteristics
  • Surface smoothness
  • Expansion coefficient
  • Fluid permeability
  • Magnetic characteristics
  • Poisson constant

Not density-dependent

  • True hardness
  • Fusion temperature
  • Phase change temperature
  • Curie temperature

High density limits complexity in design. The density target and the geometry have to be agreed together, not in sequence.

03Tolerances

What comes out of the furnace, and what needs finishing.

Tool-relatedIT 9
After sintering. Can be improved with different types of finishing e.g. repressing, cutting-machining and roll polishing.
In direction of pressingIT 13
Large shallow cavities make it easier and vice versa.

04Geometry

Levels, contour and gears.

  • Levels

    Levels cost extra and limit density. One level is easiest; two and three levels are possible, at a price.

  • Contour

    Contour like an odd shape does not cost extra on the part, just on tooling. Complexity in plan view is close to free once the tool exists.

  • Density

    High density limits complexity in design. The density target and the geometry have to be agreed together, not in sequence.

  • Gears

    Gears are a very good sinter product, but there are limitations on small modules like 0,5 and lower.

Gears are a very good sinter product — with limitations on small modules like 0,5 and lower. Send the tooth data early.

05Remember

Four rules that decide whether a part is easy or expensive.

  1. 01

    Hold down projected surface in direction of pressure.

  2. 02

    When you save weight, do it straight away so you save surface and don’t create another level.

  3. 03

    Avoid thin sections less than 1.5 mm — thin stamps and fill problems.

  4. 04

    Bit must come out of the tool — can be biggest in the middle.

06Direct line

Talk to our technical team.

These are the named contacts Callo publishes for questions and production enquiries. Confirm the right contact for a specific technical requirement directly with Callo.

07Custom components

Have a component in mind?

Send Callo your drawing or your requirements and start a technical discussion. The earlier the conversation starts, the more there is to gain — geometry, material, tooling and production economics are still open.

View quote enquiry conceptDesign guidance first
  1. 01

    Send what you have

    Share the available part information directly with Callo and confirm the preferred drawing or model format.

  2. 02

    Talk to someone technical

    Callo publishes direct phone and email contacts for questions and orders.

  3. 03

    Get a real answer

    Discuss feasibility, materials and tooling requirements with Callo before production.

Demo page only — file formats and delivery workflow require Callo approval

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