Dormer 1/4in x 100 mm HSS Hand Reamer

Introducing the series of high-performance HSS Hand Reamers Reamers form Dromer. These high-quality reamers have been designed for opening out and finishing holes to H7 tolerance in most ferrous and non-ferrous materials.

Full range of Dormer B100 series hand reamers include:
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 2mm dia - 696-819
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 3mm dia - 696-825
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 4mm dia - 696-831
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 5mm dia - 696-847
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 6mm dia - 696-853
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 7mm dia - 696-869
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 8mm dia - 696-875
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 9mm dia - 696-881
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 10mm dia - 696-897
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 12mm dia - 696-904
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 13mm dia - 696-910
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 14mm dia - 696-926
• Dormer B100 HSS Straight Shank Spiral Flute Hand Reamer, 16mm dia - 696-932
• Dormer B100 HSS Straight Shank Hand Reamer, 19mm dia - 696-948
• Dormer B100 HSS Straight Shank Hand Reamer, 1/8in dia - 696-702
• Dormer B100 HSS Straight Shank Hand Reamer, 3/16in dia - 696-724
• Dormer B100 HSS Straight Shank Hand Reamer, 1/4in dia - 696-730
• Dormer B100 HSS Straight Shank Hand Reamer, 5/16in dia - 696-746
• Dormer B100 HSS Straight Shank Hand Reamer, 3/8in dia - 696-752
• Dormer B100 HSS Straight Shank Hand Reamer, 1/2in dia - 696-774
• Dormer B100 HSS Straight Shank Hand Reamer, 5/8in dia - 696-796
• Dormer B100 HSS Straight Shank Hand Reamer, 3/4in dia - 696-803

• Suitable for use in most ferrous and non-ferrous materials
• 7-degree helix
• High Speed Steel
• Left Hand Spiral
• Steam Tempered
• Flutes finished in blue
• Lands finished in bright
• Available in a variety of metric and imperial sizes

• BS 328
• DIN 206B
• ISO 236

Reamers are rotary cutting tools with one or more cutting elements that are typically used for enlarging to size and contour previously formed holes. Hand or Machine Reamers are principal support during the cutting action is obtained from the workpiece. Reamers are typically used in:
• metalworking industry,
• engineering production,
• automotive and aircraft industries

What does H7 tolerance mean?

H7/h6 is a very common standard tolerance which gives a tight fit. The tolerances work in such a way that for a hole H7 means that the hole should be made slightly larger (up to 0.015 mm) than the base dimension.

ISO/BS328/DIN206B