Audited Supplier
34mm 7 tooth button bit
The selection of button bit is quite concerning with the rock condtion. If you don't know how to choose an applicable button bit, we strongely suggest you study the rock conditon first.
Below is the rock hardness grade list for your reference.
| Rock Grade | Hardness Level | Typical Rock | F grade | Applicable button bit |
| I | The hardest | the hardest and compact quartz, basalt and other special hard rocks | f=20 | The best quality |
| II | strong hard | very hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rock | f=15 | The best or high end quality |
| III | very hard | compact granite, very hard sandstone&limestone, quartz vein, hard conglomerate, very hard iron ore | f=10 | High end or Normal |
| IIIa | very hard | hard sandstone, limestone, marble, dolomite, pyrite ore, not hard granite | f=8 | Normal |
| IV | hard | normal sandstone, iron ore | f=6 | Normal |
| IVa | hard | Sandy shale, shaly sandstone | f=5 | Normal |
| V | middel hard | hard pelitopsammite, not hard sandstone and limestone, soft conglomerate | f=4 | Normal |
Product Description
We can also design all kinds of Alloy Bore Bit according to your requirements.
Tapered Button bit connection:
| Drill bit diameter | Taper(°) | |
| (mm) | (in) | |
| 28 | 1 3/32 | 6,7 |
| 30 | 1 3/16 | 6,7 |
| 32 | 1 1/4 | 6,7,11,12 |
| 34 | 1 11/32 | 6,7,11,12 |
| 35 | 1 3/8 | 6,7,11,12 |
| 36 | 1 13/32 | 6,7,11,12 |
| 38 | 1 1/2 | 6,7,11,12 |
| 40 | 1 9/16 | 6,7,11,12 |
| 41 | 1 5/8 | 6,7,11,12 |
| 42 | 1 21/32 | 6,7,11,12 |
| 43 | 1 11/16 | 6,7,11,12 |
| 45 | 1 3/4 | 6,7,11,12 |
| 50 | 1 31/32 | 6,7,11,12 |
| 60 | 2 3/8 | 6,7,11,12 |
Thread button bit connection:
| Drill bit diameter | Thread standard | |
| (mm) | (in) | |
| 35 | 1 3/8 | R22 R25 |
| 36 | 1 13/32 | R22 R25 R28 |
| 38 | 1 1/2 | R22 R25 R28 R32 |
| 43 | 1 11/16 | R25 R28 R32 |
| 45 | 1 3/4 | R25 R28 R32 |
| 48 | 1 7/8 | R32 |
| 51 | 2 | R32 |
| 64 | 2 1/2 | R38 T38 |
| 76 | 3 | R38 T38 T45 |
| 89 | 3 1/2 | R38 T38 T45 T51 |
| 102 | 4 | T45 T51 ST58 SD60 |
| 115 | 4 1/2 | T51 ST58 SD60 |
| 127 | 5 | T51 ST58 SD60 |
| 140 | 5 1/2 | T51 ST58 SD60 |
| 152 | 6 | T51 ST58 SD60 |
we can guarantee all our product:
(1) Direct factory wholesale price, price is cheaper than trading companies.
(2) Strict Quality Control Department, each piece bit need to be checked.
(3) Accept custom order. can special make for you.
(4) Focus on the quality.We seek long-term interest.
(5)Welcome small orders, our Min Quantity Order is 1 piece.
(6) All bit are made by skilled workers and advanced technology, we have more than 20 years' experiences, so you must be satisfied with our super quality.
Our products for other clients
Match with B22 drill rod
