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Product Details：
Product Name: T38 T45 T51 89MM Drop Center Drill Bit
Place of Origin: China
Brand Name: LITIAN
Certification: ISO9001:2015
Category: Button Bit
Drop center drill bit is mainly suitable for medium hard rock, low abrasiveness rock and integrity rock formation. This concave design has a straightening feature in the drop center, which helps the thread button bit drill straighter holes in less consolidated rock. Litian can provide various types of drop center drill bits for your choosing.
Thread：R32, R38, T38, T45,T51
Skirt Design：Standard skirt, Retrac skirt
Standard skirt Button Bits：
Appearance | Thread | Diameter | Buttons | Flushing Hole | Weight | Model No. | ||||
[mm] | [in] | Gauge | Front | Drop Center | Side | Front | [Kg] | |||
| R38 | 76 | 3" | 6×13 | 3×11 | 1×10 | 1 | 3 | 1.9 | R38-7610ZCA |
89 | 3 1/2" | 6×13 | 3×11 | 2×11 | 1 | 3 | 3.3 | R38-8911ZCA | ||
| 76 | 3" | 8×11 | 4×11 | 1×11 | - | 4 | 2.9 | R38-7612ZCA | |
| T38 | 64 | 2 1/2" | 6×11 | 3×10 | 1×10 | 1 | 3 | 1.7 | T38-6410ZCA |
70 | 2 3/4" | 6×12 | 3×10 | 1×10 | 1 | 3 | 2.2 | T38-7010ZCA | ||
76 | 3" | 6×13 | 3×11 | 1×10 | 1 | 3 | 2.3 | T38-7610ZCA | ||
89 | 3 1/2" | 6×13 | 3×11 | 2×11 | 1 | 3 | 3.3 | T38-8911ZCA | ||
| 64 | 2 1/2" | 8×10 | 4×10 | 1×9 | 1 | 4 | 1.7 | T38-6413ZCA | |
76 | 3" | 8×11 | 4×11 | 1×11 | - | 4 | 2.7 | T38-7613ZCA | ||
89 | 3 1/2" | 8×12 | 4×11 | 1×11 | 1 | 4 | 3.3 | T38-8913ZCA | ||
89 | 3 1/2" | 8×12 | 4×12 | 2×10 | - | 4 | 3.3 | T38-8914ZCA | ||
102 | 4" | 8×12 | 4×12 | 4×11 | - | 4 | 4.7 | T38-10216ZCA | ||
102 | 4" | 8×13 | 4×12 | 3×12 | - | 4 | 4.7 | T38-10215ZCA | ||
| T45 | 76 | 3" | 6×13 | 3×11 | 1×10 | 1 | 3 | 2.4 | T45-7610ZCA |
76 | 3" | 8×12 | 4×11 | 1×11 | - | 4 | 2.6 | T45-7613ZCA | ||
89 | 3 1/2" | 8×12 | 4×12 | 1×11 | - | 4 | 3.6 | T45-8913ZCA | ||
89 | 3 1/2" | 8×14 | 4×14 | 2×10 | - | 4 | 3.7 | T45-8914ZCA | ||
102 | 4" | 8×12 | 4×12 | 4×11 | - | 4 | 4.7 | T45-10216ZCA | ||
102 | 4" | 8×13 | 4×12 | 3×12 | - | 4 | 4.7 | T45-10215ZCA | ||
| T51 | 89 | 3 1/2" | 8×12 | 4×11 | 1×11 | - | 4 | 4.6 | T51-8913ZCA |
89 | 3 1/2" | 8×12 | 4×12 | 2×10 | 1 | 4 | 4.5 | T51-8914ZCA | ||
102 | 4" | 8×12 | 4×12 | 4×11 | - | 4 | 4.7 | T51-10216ZCA | ||
115 | 4 1/2" | 8×14 | 4×13 | 2×13 | 1 | 4 | 6.8 | T51-11514ZCA | ||
127 | 5" | 8×14 | 4×14 | 4×13 | - | 4 | 7.5 | T51-12716ZCA | ||
| 165 | 6 1/2" | 9×16 | 9×14 | 4×14 | - | 3 | 14.4 | T51-16522ZCA | |
178 | 7" | 9×16 | 9×16 | 4×14 | - | 3 | 15.1 | T51-17822ZCA | ||
Retrac Button Bits：
Appearance | Thread | Diameter | Buttons | Flushing Hole | Weight | Model No. | ||||
[mm] | [in] | Gauge | Front | Drop Center | Side | Front | [Kg] | |||
| R32 | 76 | 3" | 8×11 | 4×11 | 1×11 | - | 4 | 3.3 | R32-7613YFA |
| R38 | 64 | 2 1/2" | 8×10 | 4×10 | 1×9 | 1 | 4 | 1.9 | R38-6413YFA |
70 | 2 3/4" | 8×10 | 4×10 | 1×9 | 1 | 4 | 2.4 | R38-7013YFA | ||
76 | 3" | 8×11 | 4×11 | 1×11 | - | 4 | 3.3 | R38-7613YFA | ||
89 | 3 1/2" | 8×12 | 4×12 | 2×10 | 1 | 4 | 5.3 | R38-8914YFA | ||
89 | 3 1/2" | 8×12 | 4×11 | 1×11 | 1 | 4 | 5.3 | R38-8913YFA | ||
| T38 | 64 | 2 1/2" | 8×10 | 4×10 | 1×9 | 1 | 4 | 1.9 | T38-6413YFA |
70 | 2 3/4" | 8×10 | 4×10 | 1×9 | 1 | 4 | 2.4 | T38-7013YFA | ||
| T45 | 76 | 3" | 8×11 | 4×11 | 1×11 | - | 4 | 3.2 | T45-7613YFA |
89 | 3 1/2" | 8×12 | 4×12 | 2×10 | 1 | 4 | 5.4 | T45-8914YFA | ||
102 | 4" | 8×12 | 4×12 | 3×12 | - | 4 | 7.8 | T45-10215YFA | ||
102 | 4" | 8×13 | 4×12 | 4×12 | - | 4 | 7.8 | T45-10216YFA | ||
115 | 4 1/2" | 8×14 | 4×13 | 3×12 | - | 4 | 7.8 | T45-11515YFA | ||
| T51 | 89 | 3 1/2" | 8×12 | 4×12 | 2×10 | 1 | 4 | 5.3 | T51-8914YLA |
89 | 3 1/2" | 8×12 | 4×11 | 1×11 | 1 | 4 | 5.3 | T51-8913YFA | ||
| 89 | 3 1/2" | 8×12 | 4×12 | 2×10 | 1 | 4 | 5.4 | T51-8914YFA | |
102 | 4" | 8×12 | 4×12 | 3×12 | - | 4 | 7.8 | T51-10215YFA | ||
102 | 4" | 8×13 | 4×12 | 4×12 | - | 4 | 7.8 | T51-10216YFA | ||
115 | 4 1/2" | 8×14 | 4×13 | 3×12 | - | 4 | 7.8 | T51-11515YFA | ||
115 | 4 1/2" | 8×14 | 4×14 | 3×12 | - | 4 | 7.8 | T51-11515YFA | ||
115 | 4 1/2" | 8×14 | 4×14 | 4×12 | - | 4 | 10 | T51-11516YFA | ||
| 89 | 3 1/2" | 9×11 | 3×11 | 2×10 | 1 | 3 | 4.8 | T51-8914YFA | |
102 | 4" | 9×12 | 3×12 | 3×11 | 1 | 3 | 6.9 | T51-10215YFA | ||
110 | 4 21/64″ | 9×14 | 6×12 | 2×11 | - | 3 | 10 | T51-11017YFA | ||
127 | 5" | 8×16 | 4×14 | 4×14 | - | 4 | 13.5 | T51-12716YFA | ||
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Litian is a professional manufacturer focused on the production of rock drilling tools and excavation tools.
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