How to clean the grooves of a hammer drill manifold

[shapanqqcceqd]

As a rule, the brush holders on the hammer drills are mounted opposite each other. Long-term operation of the brushes leads to the formation of grooves on the collector, which form a waviness on the surface. Such wear can only be eliminated on a lathe by turning the collector.

To reduce the formation of grooves on the commutator, you should try to arrange the brush holders in a staggered pattern.

But cleaning of the grooves between the lamellas must be carried out, since micanite, the material of the gaskets between the lamellas, is harder than copper lamellas and wears out less. Over time, micanite gaskets wear out less, and their height exceeds the height of copper lamellas.

To equalize the heights, the grooves between the slats are milled, or, in simple terms, routed.

It is best to do the milling yourself with a piece of metal saw sharpened to the width of the collector grooves.

Manual milling of grooves
A metal ruler is applied parallel to the edge of the groove, the saw is hong kong telegram data pressed against its edge and pulled with light pressure. The groove is milled to the height of the copper lamella.

The milling of the grooves is completed by removing the remaining material with a hair brush and chamfering with a scraper made from a needle file. It is better to grind with felt.

Any milling should be finished with sanding and air blowing.

The condition of the bearings also affects the collector wear value. Bearing wear leads to increased collector runout, which in turn leads to accelerated wear of the carbon brushes. To eliminate collector runout, it is recommended to replace suspect bearings with new ones.

How to control the condition of the brushes
When installing new carbon brushes, it is recommended to grind them in for better adhesion to the collector surface.