BAER HSSG Hand Tap Taper (No. 1) non serial form BA 3
BAER HSSG Hand Tap Taper (No. 1) non serial form BA 3
The hand tap taper tap (No. 1) in conical design enables you to pre-cut a thread. The advantage of pre-cutting a thread is that the cutting forces on the subsequent intermediate tap (No. 2) or finishing tap (No. 3) are reduced. The screw tap in form A has a gate length of 6 - 8 threads. In contrast to normal taper taps, taper tap (No. 1) in conical design can cut a complete thread profile up to the gate area. Due to the long gate, the screw tap is more suitable for through holes. The screw tap also does not have a ring marking on the tap as is the case with normal taps. In combination with a centre and finishing tap (No. 3) it is 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.
Dimensions
| Diameter |
3 |
|---|---|
| Nominal diameter in mm |
4,1 |
| Pitch in mm |
34,795 |
| Dimension |
BA 3 |
Characteristics
| Product group |
Screw taps |
|---|---|
| Product type |
Hand tap sets |
| Thread standard |
BA: British Association Standard Thread according to BS 93 |
| Tolerance |
medium |
| Direction |
Right |
| Standard |
ISO 529 |
| Tensile strength at room temperature |
up to 900 N/mm² | 27.1 HRC |
| Material |
HSSG bright |
3.4 mm
Through hole and blind hole up to 2 x D
Form A straight fluted
6-8 threads
Rarely occurs. Chips remain in flutes.
External cooling and lubrication
HSSG bright
up to 900 N/mm² | 27.1 HRC
medium
Applications
- Materials with good machinability up to 900 N/mm²
- Unalloyed and low-alloy steels
Technical drawing
| D1 |
BA 3 |
|---|---|
| D2 |
4,5 mm |
| L1 |
53 mm |
| L2 |
13 mm |
| Diameter |
3 |
| Square |
3,55 mm |
Application – Sample materials for taps
| Unalloyed construction steels | |
|---|---|
| 1.0035 | S185 (St33) |
| 1.0036 | S235JRH |
| 1.0038 | RSt37-2 |
| 1.0039 | S235JRG1+CR |
| 1.0044 | St44-2 |
| 1.0060 | E335 (St60-2) |
| 1.0116 | St37-3 |
| 1.0570 | St 52-3 |
| Alloyed construction steels | |
|---|---|
| 1.5415 | 15Mo3 |
| 1.5423 | 16Mo5 |
| 1.5622 | 14Ni6 |
| 1.7335 | 13CrMo44 |
| 1.7337 | 16CrMo44 |
| 1.7715 | 14MoV63 |
| Free-cutting steels | |
|---|---|
| 1.0711 | 9S20 |
| 1.0715 | 9SMn28 |
| 1.0718 | 11SMnPb30 |
| 1.0721 | 10S20 |
| 1.0723 | 15S20 |
| 1.0726 | 35S20 |
| 1.0737 | 9SMnPb36 |
| 1.0758 | 60SPb20 |
| Case-hardening steels | |
|---|---|
| 1.0401 | (C15) |
| 1.7016 | 17CR3 |
| 1.7131 | 16MnCr5 |
| 1.5919 | 15CrNi6 |
| Quenched and tempered steels unalloyed | |
|---|---|
| 1.0402 | C 22 |
| 1.1151 | C22E (Ck22) |
| 1.0503 | C 45 |
| 1.1191 | C45E (Ck45) |
| Cast steel | |
|---|---|
| 1.0420 | GS-38 |
| 1.5419 | GS-22 Mo 4 |
| 1.6750 | GS-20 NiCrMo3 7 |
| 1.7357 | GS-17 CrMo 5 5 |
| Malleable cast iron | |
|---|---|
| 0.8145 | EN-GJMB 450-6 |
| 0.8170 | EN-GJMB 700-2 |
| 0.8045 | EN-GJMW-450-7 |
| 0.8055 | EN-GJMW-550-4 |
| Pure copper low-alloyed | |
|---|---|
| 2.0240 | CuZn15 |
| 2.0265 | CuZn30 |
| Brass short-chipping | |
|---|---|
| 2.0401 | CuZn39Pb3 |
| Brass long-chipping | |
|---|---|
| 2.0321 | CuZn37 |
| 2.0335 | CuZn36 |
| 2.0360 | CuZn40 |
| Aluminum cast Si > 5-12 % | |
|---|---|
| 3.2161 | G-AlSi8Cu3 |
| 3.2163 | G-AlSi9Cu3 |
| 3.2381 | G-AlSi10Mg |
| 3.2583 | G-AlSi12(Cu) |
| Lamellar graphite cast iron | |
|---|---|
| 0.6010 | EN-GJL 100 (GG-10) |
| 0.6020 | EN-GJL 200 (GG -20) |
| 0.6025 | EN-GJL 250 (GG-25) |
| 0.6030 | EN-GJL 300 (GG -30) |
| Copper-tin alloy (bronze) short-chipping | |
|---|---|
| 2.1090.01 | G-CuSn7ZnPb |
| 2.1086.01 | G-CuSn10Zn |
| 2.1097 | G-CuSn5ZnPb |
| Pure copper, low-alloyed copper | |
|---|---|
| 2.0240 | CuZn15 |
| 2.0265 | CuZn30 |
Further information
- BA - British Association Standard Thread BS 93
- Designations, geometries and definitions on taps
- Thread tolerances of the internal thread
- Internal thread and core hole dimensions
- Tap Chamfer forms
- Comparison inch-mm
- Surface treatments on tapping tools
- Cutting speeds and lubrication/cooling
- Information about tapping
- Material table