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Buttress Threads and Saw threads

The profile of a buttress thread or saw thread resembles a saw tooth. This makes it possible to transfer immense force along the screw with a flank angle of 30° to 40°. We manufacture single-start and multi-start ISO buttress screws according to DIN 513, DIN 20401, DIN 2781 and DIN 6063 specifications.

We also manufacture your buttress threads and saw threads with custom sizes or out of any material you desire. Many customers chose C45 steel or higher steel grades such as 42CrMo4. We also offer any special coating for your buttress thread such as thin dense chrome plating or phosphating.

The corresponding buttress nuts are often made of aluminum bronze. However some heavy duty lifting applications may also require tougher grades such as manganese bronze.

Buttress Threads

Buttress Threads at Work

Buttress threads - saw threads

Screws with a buttress thread profile are mainly used in vertical lifting applications where the load is firmly supported on the upper flank of the screw thread.

The asymmetrical profile of the buttress thread, makes them suitable for bearing extremely high, single-direction axial loads and their load capacity is far higher than that of common Acme screws or Trapezoidal screws. Therefore buttress threads are commonly used as:

  • Screws for friction screw presses
  • Lifting screws for heavy lifting equipment
  • Lead screws or power screws in machines with high loads
  • Transmission threads in turning and milling machines
  • Screws in artillery equipment

Technical Information on Buttress Threads and Saw Threads

Here are the nominal dimensions for buttress threads and saw threads according to DIN 513 specifications and a sample technical drawing:

How to Get Your Custom-made Buttress Thread

Just give us the specifications you want – that’s really all we need! You can leave the technical conversion of your vision into an actual finished buttress thread to us. Simply send us a technical drawing or rough sketch with some dimensions and we will do the rest.