SQUARE COLLETS FOR LATHE - PINZAS CUADRADAS PARA TORNO - SQUARE COLLETS FOR LATHE

Holding square bars on a lathe with a three-jaw chuck is always very difficult. For this purpose I have designed this model so that it can be manufactured with a 3D printer.

I have included three files with different sizes, for 6 x 6 mm, 10 x 10 mm and 12.7 x 12.7 mm (1/2 ") bars.

These models are scalable to the size you need but you must take as reference the size of the bar you want to turn, NOT the general size of the part.

For example, if you want to scale to turn a 15 x 15 mm bar the scale factor is obtained with the following formula:

Scale factor = (15 * 100) / 12.7 which would give a result of 118.11% for the whole part.

This in the case of starting from the model I have uploaded for 12.7 x 12.7 mm bars.

If you wanted to make a clamp for 7 x 7 mm bars, it would be convenient to start from the model for 6 x 6 mm bars. It is always convenient to choose the closest size to scale up from it.

The bar to be clamped should slide smoothly through the square hole, without large clearances, before the clamp is tightened on the lathe chuck.

This will ensure perfect centering, as can be seen in the accompanying photographs.

FDM Creality Sermoon D1 FDM Printer

Material:

The parts shown in the photographs are printed in PLA and work very well. Just be cautious of the temperature at which they are used. PLA should not exceed 50 to 60 degrees.

They can also be printed on other materials such as ABS or PETG which can withstand higher temperatures.

Nozzle: 0.4 mm

Parameters:

Layer thickness: 0.2 mm

Filling: 50%

Top solid layers: 3

Lower solid layer: 3

Perimeters: 3

Supports: No

Raft: No