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BAER HSSE Hand Tap Set (2 pcs.) Set MF 8 x 1


The hand tap set consists of two taps and allows you to cut a finished thread with significantly reduced risk of breakage. The advantage of two-piece hand taps is that the respective parts of a set share the cutting power: The taper tap (No. 1) (marked with a ring) removes 65 per cent of the thread profile and the and brings the thread into shape. The finishing tap (No. 3) has no ring marking and cuts the remaining thread profile to produce the 100% full and usable thread. The division of labour between the two screw tap makes it easier to cut a straight and clean thread by hand.
Compared to the machine tap, the hand tap has a short shank. This allows you to cut internal thread by hand without jamming and can be operated with tap wrenches, tool ratchets or other holding tools with square drive.
The thread can be cut in a pre-drilled core hole.
Due to the short chamfer of the finish tap, the hand tap set can be used reliably and universally for through holes and blind holes.
As a rule, two-piece hand taps- sets are used for fine threads with a smaller pitch than with coarse thread, as the thread profile surface is smaller than with coarse threads and the force effects on the taps are smaller.

Dimensions

Diameter 8
Nominal diameter in inches 0,315
Nominal diameter in mm 8
Pitch 1
Pitch in mm 1
Dimension MF 8 x 1,0
Square 4,9 mm

Characteristics

Product group Screw taps
Product type Hand tap sets
Thread standard MF: Metric ISO fine thread according to DIN 13
Tolerance ISO2/6H
Direction Right
Standard DIN 2181
Tensile strength at room temperature up to 1000 N/mm² | 32 HRC
Material HSSE bright

Technical information – Screw taps

Schematic representation of Core hole diameter
Core hole diameter
7 mm
Schematic representation of Hole type
Hole type
Through hole and blind hole up to 2 x D
Schematic representation of Form / Geometry
Form / Geometry
Form C straight fluted
Schematic representation of Chamfer
Chamfer
2-3 threads
Schematic representation of Chip removal
Chip removal
Rarely occurs. Chips remain in flutes.
Schematic representation of Cooling
Cooling
External cooling and lubrication
Schematic representation of Material
Material
HSSE bright
Schematic representation of Tensile strength at room temperature
Tensile strength at room temperature
up to 1000 N/mm² | 32 HRC
Schematic representation of Tolerance: ISO2/6H
Tolerance
ISO2/6H

Applications

  • General-purpose use
  • Steels up to 1000 N/mm²

Examples of applications

  • Fine thread for bicycle bottom bracket axle saddle clamp M8 x 1
  • Bicycle front wheel axle
  • Bicycle saddle clamp
  • Bottom bracket axle Seat clamp

Technical drawing

Technical drawing hand screw tap with overrun shank
D1 MF 8 x 1
D2 6 mm
L1 56 mm
L2 22 mm
Diameter 8
Square 4,9 mm

Application – Sample materials

General construction steels
1.0035 S 185 (St 33)
1.0036 S 235 JRH
1.0039 S 235JRG1+CR
1.0060 E 335 (St 60-2)
Free-cutting steels
1.0718 11SMnPb30
1.0721 10S20
1.0726 35S20
1.0728 60S20
Case-hardening steels
1.0401 (C15)
1.7016 17 CR3
1.7131 16MnCr5
1.5919 15CrNi6
Quenched and tempered steels unalloyed
1.0402 C 22
1.1151 C22E (Ck 22)
1.0503 C 45
1.1191 C45E (Ck 45)
Cast steel
1.5681 GS-10 Ni 19
1.6760 GS-22 NiMoCr 5 6
Quenched and tempered steels alloyed
1.1133 20Mn5
1.5710 36NiCr6

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