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7 Degree Tapered Rock Drill Bit H22 26-42mm Carbide Button Bit for YT28 Air Leg Rock Drill
| MOQ: | 10 Pieces |
| Price: | USD 5-15 / Piece |
| Standard Packaging: | Standard export wooden case or carton with foam protection |
| Delivery Period: | 7-15 working days after order confirmation |
| Payment Method: | T/T,L/C,Western Union |
| Supply Capacity: | 50000 Pieces per Month |
7 Degree Tapered Button Bit
,H22 Carbide Rock Drill Bit
,Mining Quarrying Tunneling Drilling Tool
Product Overview
The 7-degree tapered button bit is a rock drilling tool designed to pair with H22 hexagonal tapered drill rods on YT23, YT24 and YT28 air leg rock drills. Its shallow 7-degree taper profile locks the bit onto the rod through impact self-tightening, allowing quick bit changes and low drilling resistance. Available in a full diameter range of 26-42mm, it is widely used for anchor bolt drilling, quarrying and shallow-hole drilling in soft to medium rock formations.
Key Features & Advantages
- Quick & easy bit removal: the shallow taper needs only a gentle tap to release, reducing labor and downtime during frequent bit replacement.
- Lower drilling resistance: a smaller taper contact area lowers feed pressure and raises penetration speed, roughly 10-15% faster than 11-degree taper bits in the same rock.
- Less taper wear: even stress distribution on the shallow taper surface slows wear on both the bit socket and the drill rod, extending rod service life by about 20%.
- Better hole straightness: reduced tail resistance keeps the bit on track in fractured or weathered rock, producing cleaner holes with less deviation.
- Universal compatibility: fits the standard YT23/YT24/YT28 air leg rock drills with H22 taper rods, covering 26-42mm bit sizes for one-stop stocking.
Applications
- Anchor bolt and slope support drilling
- Quarrying and dimension stone extraction
- Mining shallow-hole drilling in soft to medium rock
- Road slope, tunnel and water-conservancy anchor drilling
Technical Specifications
| Taper Degree | 7° (7-11° composite also available) |
| Diameter Range | 26-42mm |
| Rod Type | H22 hexagonal tapered drill rod |
| Compatible Drills | YT23 / YT24 / YT28 air leg rock drill |
| Recommended Depth | 0.8-2.5m |
| Rock Formation | Soft to medium rock, weathered rock, shale, limestone |
| Bit Type | Carbide button bit |
Operating Notes
- Match only with 7-degree (or 7-11-degree) taper drill steel; clean the taper contact surfaces before assembly.
- Use light impact and low feed pressure at hole opening to avoid carbide chipping.
- Best for shallow drilling within 2.5m; for hard rock and deep holes, an 11-degree or 12-degree taper is recommended.
- Reverse the rod and tap gently to remove the bit; avoid heavy hammering.
FAQ
What rock types suit a 7-degree tapered button bit? Soft to medium formations such as shale, limestone, weathered and fractured rock. Hard granite and deep holes over 2.5m are better served by 11-degree or 12-degree taper bits.
Which drill rods does it fit? H22 hexagonal tapered rods with a matching 7-degree (or 7-11-degree composite) taper.
What is the minimum order quantity? Please contact us with your required diameter and quantity; we support both small trial orders and bulk supply.
