Spiral Flute Bridge Reamers - Metric

Have a taper lead angle of 1 in 10 on diameter and are used for reaming pairs of holes which may be out of alignment, particularly with structural steel components, i.e. when assembling pre-drilled steel plate ready for riveting. Previously known as 'Boilermakers' reamers. Manufactured to BS 328 : Part 4 : 1990.

Metric Limits of Tolerance (to H7)
Diameter
Over Up to and Including High Low
- 3 0.008 0.004
3 6 0.010 0.005
6 10 0.012 0.006
10 18 0.015 0.008
18 30 0.017 0.009
30 50 0.021 0.012
50 80 0.025 0.014
80 120 0.029 0.016

Inch Limits of Tolerance (to H7)
Diameter
Over Up to and Including High Low
- 7/64" 0.0003 0.0001
7/64" 15/64" 0.0004 0.0002
15/64" 25/64" 0.0005 0.0002
25/64" 43/64" 0.0006 0.0003
43/64" 11/8" 0.0007 0.0004
11/8" 11/2" 0.0008 0.0004
11/2" 2" 0.0010 0.0005

Guhring GT100 Jobber Drills HSS

HSS GT100 jobber drills. For drilling in difficult conditions when swarf congestion prevents an adequate flow of coolant. For use in steel and cast iron having a hardness of up to 1000N/mm2. Not recommended for nickel-chrome steels or similar material. Manufactured to BS 328/DIN 338.

Series 549 - Inch

Sherwood Ground Thread Chasers HSS

Used for the lathe turned production and repair of threads.

For all technical specifications please refer to our catalogue.

Hand

ISO Metric Form

Kennedy® Jobber Drills Solid Carbide

For drilling steels, cast steels, cast iron, chilled cast iron, malleable cast iron, non-ferrous heavy and light metal and abrasive plastic. Point angle 118°. Tolerance of diameter: h7. Tolerance of shank: h6. Supply unit. All diameters - 1 pce. Manufacturing Standard: DIN 338, BS 328.

Inch

Guhring Stub Drills HSS

Ideally suited for portable drill applications where the shorter flute and stub length offer the extra rigidity normally associated with fixed drilling. Manufactured to BS328:Part 1:1986/DIN1897RN.

Series 223

Guhring Machine Chucking Reamers Intermediate Diameter HSS-E

Available in diameters ranging from 2mm to 10mm in increments of 0.01mm. Made from HSS-E steel with a bright finish, left hand spiral flute. For all ferrous and non-ferrous metals and hard and soft plastics. For use on CNC machines, producing high quality reamed holes. Manufactured to DIN 212 and DIN 2172 section 1.

Shank diameter equals cutting diameter - 0.025mm.
dia 2.00 - dia 2.65 / dia 2.66 - dia 10.00 H9.

Diameter Tolerances (to H7)
Up to 5.5mm: plus 0.004mm minus 0.000mm
Above 5.5mm: plus 0.005mm minus 0.000mm.

Code numbers are determined by the nominal diameter. Delete the decimal point; create a four figure number by preceding the figures with a zero, if required. All codes finish with the letter A, i.e. 3.60 becomes 0360A.

For all technical specifications please refer to our catalogue.

Kennedy Precision Hand Files Needle Pattern (Round Handle)

Available in 14cm and 16cm lengths and a complete range of shapes. Manufactured to BS 498:1990.

Hand

Available in Cut 0, 2 or 4.

Sherwood Jobber Drills Steam Tempered HSS

Suitable for drilling steel, cast steel, alloyed and unalloyed, grey cast iron, spheroidal iron, sintered powder metal, German silver and graphite. Manufactured to BS328/DIN338RN.

Black Finish (W-Finish)
This is the most common surface finish and is the result of a steam tempering operation in which steam is passed over the product during a controlled tempering cycle, producing a black oxide layer. Black tools are generally recommended for ferrous applications where the oxide layer aids chip flow, helps to dissipate heat by retaining some coolant on the tool surface and also helps to prevent the tool from staining.

Series J100

SwissTech Long Series Parabolic Drills HSS-Co 8% Cobalt TiN Coated

Parabolic flute form drill with high resistance to non-alloyed and alloyed steels. Chip breaking point performs well on long chipping materials with a tensile strength up to 1,300 N/mm2. Drills up to 5 x diameter. TiN coating provides longer tool life. Point angle 130. Helix angle: High. Web thickness: Strengthened. Relief angle: Normal. Tolerance of diameter: h8. Tolerance of shank: f11. Manufacturing standard: DIN340.

For all dimensional specifications please refer to our catalogue.

Series 4020 - Metric

Sherwood Gauge Drills HSS Steam Tempered

General purpose drills for steels, cast steel, grey cast iron, malleable cast iron, nickel brass, aluminium alloy and graphite. Point angle: 118, helix angle: normal, web thickness: standard, relief angle: 8 - 20, tolerance of diameter: h8, tolerance of shank: f11. Manufactured to ANSI B328, BS 328 and DIN 338.

Number & Letter Gauge Drills:
Gauge drills are still in common use in the U.S. In the past, they were popular elsewhere, but now have been largely discarded in favour of metric sizes. When using a gauge rather than a standard measurement of size the user has to refer to a table of gauge sizes. For example, to drill a hole which is 10 thou (thousandth of an inch .0010) bigger than a 1/8 inch bolt, the user must first work out that 1/8 inch is 125 thou, so the hole size needed is 135 thou, and then must look up in a reference book which gauge drill bit is closest to this diameter - a number 29. Number gauge sizes are similar or equivalent in some respects to, but different from, American wire gauge. Number gauge is usually used from size 80 (the smallest) to size 1 (the largest) followed by letter gauge size A (the smallest) to size Z (the largest). Number gauge is actually defined down to size 97, but these smaller sizes are rarely encountered. It happens that as the technology for making small drill bits and drilling small holes has become more available, metric drills have become the norm.

For all dimensional and technical specifications please refer to our catalogue.

Series J100 - Gauge Sizes