Cleaning stones without handle for commutators, slip rings and for grinding in new brushes

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Tips for choosing the right size of whetstones

 

The dimensions of the grindstones are always specified in length x width x height (LxWxH). The largest possible grinding surface should always be used for each machine (length x width). The height (H) of the grinding stone is determined by the diameter ratios of the commutator and housing. Commutator whetstones (article no. SPXxx): The grindstone should have a width (B) that covers at least ¾ of the length of the flaps as long as it fits comfortably between the brush yokes. For normal operation, three or four different sizes should suffice for each operation. Once the approximate dimensions have been determined, the next most suitable article no. can be selected.

Art.-Nr.

Gentle, light effect. Soft, loosely bound grain. Self-cleaning stone through abrasion. No erosion or scratching of the copper. Often also called “pumice or chalk stone”.

 

Degrees of hardness:

S = soft (only available from factory stock) M = medium (standard) H = hard (only available from factory stock) When ordering, please state the hardness designation after the article no. 1) (e.g. SPX13M). Minimum order quantity: 1 pack

 

Art. No. Size [mm] Stock type Piece/package
SPX13 1) 6.4 x 6.4 x 120.7 M 6
SPX12 1) 12.7 x 6.4 x 120.7 M 4
SPX15 1) 9.5 x 9.5 x 120.7 M 4
SPX10 1) 12.7 x 9.5 x 120.7 M 2
SPX09 1) 12.7 x 12.7 x 120.7 M 2
SPX28 1) 15.9 x 12.7 x 120.7 * 4
SPX08 1) 19.1 x 12.7 x 120.7 M 4
SPX05 1) 25.4 x 15.9 x 120.7 M 4
SPX06 1) 12.7 x 25.4 x 120.7 * 4
SPX16 1) 25.4 x 25.4 x 120.7 * 4
SPX17 1) 50.8 x 25.4 x 120.7 * 2
SPX21 1) 76.2 x 50.8 x 152.4 * 1
SPX20 1) 76.2 x 50.8 x 203.2 * 1

 

*) Subject to availability (no stock item)

Minimum order quantity: 1 pack