Trapezoidal nut 28x5 left-hand flanged, bronze

Product Description

Trapezoidal nut 28x5 left-hand flanged, bronze

A trapezoidal nut is the counterpart of the screw: the stationary (or rotating) part of the system that converts rotation into linear travel. Made of Tin bronze CuSn5Zn5Pb5-C (CC491K), left-hand thread Tr 28x5, in accordance with DIN 103 / ISO 2901-2904.

Technical data

Frequently asked questions

Which trapezoidal screw fits this nut?

You need a screw Tr 28x5 with the same thread hand (left-hand) and the same pitch - other sizes will not fit together.

What does the symbol Tr 28x5 mean?

"Tr" is a symmetrical trapezoidal thread (flank angle 30°). The first number is the outer diameter of the screw in millimetres, the second is the thread pitch, i.e. the linear travel per full turn.

How do the material families of trapezoidal nuts differ?

Steel is chosen for fastening joints without sliding motion, bronze for drives with continuous sliding motion (low friction), and brass for lighter applications where moisture resistance matters at a lower cost than bronze.

How can you tell that a trapezoidal nut is worn?

The most common sign is increasing backlash between the screw and the nut - noticeable jerking when the direction of motion changes. This means the nut thread has worn and needs to be replaced.

What are the properties of this nut's material?

Material: Tin bronze CuSn5Zn5Pb5-C (CC491K) - a material long used in screw drives because of its favourable sliding friction coefficient.

How is this nut mounted in the mechanism?

The holes in the flange allow the nut to be screwed directly to the moving part of the machine, without an intermediate sleeve.

Where are 28x5 trapezoidal nuts used?

Typical applications of 28x5 nuts are: presses and screw jacks, machine vices, height adjustment mechanisms, sliding tables and axis drives in machine tools - wherever precise conversion of rotary into linear motion matters.

Product photos are for illustration purposes.