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{"title":"12 Degree Tapered Rock Drill Bit H22 26-42mm Carbide Button Bit for YT28 Air Leg","imgUrl":"https:\/\/img.chinax.com\/nimg\/b9\/53\/4b730d0cfe20a0da6c8bc7a8fc50-200x200-1\/12_degree_tapered_rock_drill_bit_h22_26_42mm_carbide_button_bit_for_yt28_air_leg.jpg","attrs":{"Diameter Range":"28-50mm","Model Number":"","Place of Origin":"Hunan China","Recommended Depth":"Over 2.5m (deep hole)"}}
{"title":"32mm Tapered Button Bit Alloy Steel Carbide Insert for Mining Quarrying Rock","imgUrl":"https:\/\/img.chinax.com\/nimg\/fd\/b3\/c18bc543033a4a04ed135c5fad1d-200x200-1\/32mm_tapered_button_bit_alloy_steel_carbide_insert_for_mining_quarrying_rock_drilling.jpg","attrs":{"Typical Button Quantity":"4\u20137 Buttons","Surface Treatment":"Shot Blasting, Anti-Rust Treatment","Price":"USD3.5-8.00 Piece","Place of Origin":"Hunan,China"}}
{"title":"38mm Tapered Button Drill Bit Tungsten Carbide Rock Drilling Tool for Quarrying","imgUrl":"https:\/\/img.chinax.com\/nimg\/19\/6f\/564884a741df4a86ff534ac48b30-200x200-1\/38mm_tapered_button_drill_bit_tungsten_carbide_rock_drilling_tool_for_quarrying_mining_tunneling_construction.jpg","attrs":{"Connection Type":"Tapered Socket Connection","Button Material":"Tungsten Carbide","Manufacturing Process":"Forging, Heat Treatment, Precision Machining","Packaging Details":"Standard export carton with protective foam insert, customizable brand packaging available"}}
{"title":"40mm Tapered Button Bit Tungsten Carbide Rock Drilling Tool for Quarrying Mining","imgUrl":"https:\/\/img.chinax.com\/nimg\/48\/16\/ad03a7778186c58b0d2efb95823c-200x200-1\/40mm_tapered_button_bit_tungsten_carbide_rock_drilling_tool_for_quarrying_mining_tunneling_construction.jpg","attrs":{"Connection Type":"Tapered Connection","Button Material":"Tungsten Carbide","Applicable Rock Formation":"Medium to Hard Rock","Place of Origin":"China"}}
{"title":"34mm Tapered Button Bits Tungsten Carbide Alloy Steel for Mining Quarrying Rock","imgUrl":"https:\/\/img.chinax.com\/nimg\/ae\/b8\/85a3f60e0c11e17d55c4d9c1535a-200x200-1\/34mm_tapered_button_bits_tungsten_carbide_alloy_steel_for_mining_quarrying_rock_drilling.jpg","attrs":{"Brand Name":"Custom","Model Number":"34MM","Packaging Details":"Individual box with anti-rust wrapping, export-grade corrugated carton or wooden case","Connection Type":"Tapered Socket"}}
{"title":"Carbide Rock Drill Tapered Button Bits 32-50mm Diameter Custom Taper Angle for","imgUrl":"https:\/\/img.chinax.com\/nimg\/84\/a6\/4ec6f45bc61847ec63e774dcb989-200x200-1\/carbide_rock_drill_tapered_button_bits_32_50mm_diameter_custom_taper_angle_for_mining.jpg","attrs":{"Brand Name":"Custom","Suitable Rock Formation":"Soft, Medium, Hard Rock","Certification":"","Taper Angle":"6 degree, 7 degree, 9 degree, 11 degree"}}
{"title":"48mm Tapered Button Bits Carbide Rock Drill Bit Percussive Drilling Tool for","imgUrl":"https:\/\/img.chinax.com\/nimg\/df\/1e\/2bc13e50ced886017352ff471b15-200x200-1\/48mm_tapered_button_bits_carbide_rock_drill_bit_percussive_drilling_tool_for_handheld_mining_tunneling_anchor_bolting.jpg","attrs":{"Taper Angle":"6 degree,7 degree, 11 degree, 12 degree","Insert Process":"Hot-Pressed Brazing","Compatible Equipment":"Handheld Rock Drill, Light Pneumatic or Hydraulic Rig","Suitable Rock Formation":"Medium-Hard to Hard Rock"}}
The 12-degree tapered button bit is a heavy-duty rock drilling tool built for hard rock and deep-hole drilling. Its steep taper profile delivers the strongest self-locking grip on the drill rod, preventing bit drop under high-impact, deep-hole conditions where 7-degree and 11-degree bits may loosen. It pairs with H22 hexagonal tapered drill rods on YT23, YT24 and YT28 air leg rock drills, in a full diameter range of 26-42mm.
Key Features & Advantages
Strongest self-locking: the steep 12-degree taper grips firmly, preventing bit drop in deep holes and hard formations.
High-impact resistance: withstands sustained heavy impact in hard granite and high-impact drilling.
Less taper wear under load: stable fit reduces socket and rod wear during heavy-duty operation.
Better hole straightness: firm grip keeps the bit on track in hard, fractured rock for straighter holes.
Universal compatibility: fits standard YT23/YT24/YT28 air leg rock drills with H22 taper rods, covering 26-42mm sizes.
Applications
Hard granite and hard rock drilling
Deep-hole mining and tunneling
High-impact quarrying and construction drilling
Deep anchor and slope support drilling
Technical Specifications
Taper Degree
12°
Diameter Range
26-42mm
Rod Type
H22 hexagonal tapered drill rod
Compatible Drills
YT23 / YT24 / YT28 air leg rock drill
Recommended Depth
Over 2.5m (deep hole)
Rock Formation
Hard granite, hard rock
Bit Type
Carbide button bit
Operating Notes
Match only with 12-degree taper drill steel; clean the taper contact surfaces before assembly.
Removal requires a firm hammer tap; the steep taper grips more tightly than 7-degree or 11-degree bits.
Not recommended for soft rock shallow holes, where a 7-degree taper changes bits faster.
Inspect taper fit regularly under sustained heavy impact.
FAQ
When should I choose a 12-degree taper bit? For hard granite, deep holes over 2.5m and high-impact drilling where maximum self-locking is needed to prevent bit drop.
Which drill rods does it fit? H22 hexagonal tapered rods with a matching 12-degree taper.
What is the minimum order quantity? Please contact us with your required diameter and quantity; we support small trial orders and bulk supply.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
500-1000
Employee Number:
50~100
Ecer Certification:
Verified Supplier
Brighttop Global Co., Ltd. is a professional and trusted supplier of expansive mortar, rock drilling tools and related equipment for the quarrying, mining, construction, demolition and tunneling industries. With extensive industry experience, we provide reliable products, practical technical support... Brighttop Global Co., Ltd. is a professional and trusted supplier of expansive mortar, rock drilling tools and related equipment for the quarrying, mining, construction, demolition and tunneling industries. With extensive industry experience, we provide reliable products, practical technical support...