Dormer morse taper shank machine reamer - Spiral flute.

Used for opening out and finishing existing holes to H7 tolerance in most ferrous and non-ferrous metals.

Flute Geometry - 7º Helix Left hand spiral.
Bevel Lead - 45º a Side

To obtain the best results when using reamers it is essential to make them work. It is a common fault to prepare holes for reaming with too little stock left in. If insufficient stock is left in the hole before reaming then the reamer will rub quickly, show wear and will result in loss of diameter. It is equally important for performance not to leave too much stock in the hole.