KENNAMETAL Style Boring Bars - Min bore .425-.930 - STUPR & STFPR Bars using TPMT (60° Triangle)
- Industry standard STUPR & STFPR type
- STUPR: 3° lead angle, STFPR: 0°
- Uses TPMT type inserts
- Shanks have locating flats
- Available in steel, heavy metal or carbide shanks
- Compatible with same style Kennametal® STUPR/STFPR boring bars
- Made in the USA
| Heavy Metal | Carbide Shank | ||||||||||
| 6 x Shank Diameter | 8 x Shank Diameter | ||||||||||
| Insert | Kennametal Reference |
Shank “D” |
Fig # | Min Bore | L | Part Number | Min Bore | L | Part Number | Screw | Wrench |
| TPMT 21.5_ | _06-STUPR-2 | .375 | 1 | 0.425 | 4 | BBK-3260R | 0.480 | 6 | BBK-5260R | SC-31 | TX-207 |
| _08-STUPR-2 | .500 | 1 | 0.550 | 6 | BBK-3270R | 0.600 | 8 | BBK-5270R | |||
| _10-STUPR-2 | .625 | 2 | 0.675 | 6 | BBK-3280R | 0.770 | 8 | BBK-5280R | |||
| _06-STFPR-2 | .375 | 1 | - | - | - | 0.480 | 6 | BBK-5200R | |||
| _08-STFPR-2 | .500 | 1 | - | - | - | 0.600 | 8 | BBK-5210R | |||
| _10-STFPR-2 | .625 | 2 | - | - | - | 0.770 | 8 | BBK-5220R | |||
| TPMT 32.5_ | _12-STFPR-3 | .750 | 2 | 0.800 | 8 | BBK-3230R | 0.930 | 10 | BBK-5230R | SC-32 | TX-215 |
USING “TPMT” INSERTS
| Carbide Shank | Carbide w/ Hole | ||||||||
| Insert | Tungaloy Reference# |
Shank “D” |
Min Bore | L | Part Number | L | Part Number | Screw | Wrench |
| TPMT21.5_ | 06-STFPR-2 | .375 (3/8) | 0.450 | 6.0 | UD-C06MSTFPR2 | 6.0 | UD-E06MSTFPR2 | SC-31 | TX-207 |
| 08-STFPR-2 | .500 (1/2) | 0.570 | 8.0 | UD-C08RSTFPR2 | 8.0 | UD-E08RSTFPR2 | SC-31 | TX-207 | |
| 10-STFPR-2 | .625 (5/8) | 0.730 | - | - | 7.0 | UD-E10QSTFPR2 | SC-31 | TX-207 | |
| TPMT32.5_ | 12-STFPR-3 | .750 (3/4) | 0.930 | - | - | 7.0 | UD-E12QSTFPR3 | SC-32 | TX-215 |