Dormer B901 B9014.0 HSS-E High Speed Cobalt Steel Straight Shank Machine Reamer with H7 Accuracy, Diameter 4.0 mm, Single Pack

• High H7 accuracy - designed to finish holes within the limit of H7 hole tolerance (ISO limits and fits)
• Premium HSS - E material - can be used for reaming in many materials incl. steels, aluminium, stainless steel
• 45 Degree bevel lead (Form B) - allows accurate location and centring to improve performance and hole quality
• Precision ground geometry - left hand helix and right hand cutting provides smooth reaming and improves holes size and surface finish
• Straight shank - designed for high performance machine reaming

Product Description High H7 accuracy - Designed to finish holes within the limit of H7 hole tolerance (ISO limits and fits) Premium HSS - E material - Can be used for reaming in many materials incl. steels, aluminium, stainless steel. 45 Degree Bevel lead (Form B) - Allows accurate location and centring to improve performance and hole quality. Precision ground geometry - Left hand helix and right hand cutting provides smooth reaming and improves holes size and surface finish. Straight shank Design for high performance machine reaming. Manufacturer's Description B901 Hss Straight Shank Machine Reamer Spiral Flute 4.00 Mm Flute geometry 7º Left Hand Spiral Beval Lead 45º a side Used for opening out and finishing existing holes to H7 tolerance in most ferrous and non-ferrous metals. 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.