SD Series DTH Button Bit

SD Series DTH Button Bit is Mainly used for Quarrying, Ore Mining, Coal Mining, soft, medium hard, and hard rock, blast hole drilling and water well drilling project, Marble quarry or well drilling and other construction projects....

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GMD could supply lots of grades DTH Bits, they can be chosen according to different applications. Both soft, medium-hard, and hard rocks, Our DTH Bit could have a good performance. 

GMD provide the SD Series DTH Button Bit with the advantage of high flatness, smooth hole wall, high rigid of drill rod and hammer, independent of high axial thrust, no limit of drilling depth, low cost of devices and easiness to maintain.

 

Product Name: SD Series DTH Button Bit

Shank Type:  SD4, SD5, SD6, SD8

Bit Diameter: 105mm-305mm

Bit Face Design: Flat Face, Convex Face, Concave Face, Drop Center, Double Gauge.

 

Details, kindly check below:

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SD Series DTH Button Bit 
Shank TypeDiameter in mmFlushing Holes NO.Gauge ButtonsFace ButtonsApprox. Weight
SD 410527*14mm6*13mm9.0 KGS
11027*14mm6*13mm9.5 KGS
11528*14mm7*13mm10 KGS
12028*16mm7*13mm11.5 KGS
12728*16mm7*13mm12.5 KGS
SD 513528*16mm8*13mm15.5 KGS
14028*17mm7*14mm16.0 KGS
14628*18mm7*14mm16.5 KGS
15228*17mm8*14mm17.0 KGS
16528*18mm9*16mm18.0 KGS
SD 615228*17mm8*14mm26.0 KGS
16528*18mm9*16mm27.0 KGS
17128*18mm10*16mm29.0 KGS
19039*18mm11*16mm32.0 KGS
20339*18mm12*16mm34.0 KGS
SD 820329*18mm12*16mm37.0 KGS
216210*18mm17*18mm48.0 KGS
241210*18mm17*18mm63.0 KGS
254312*18mm19*18mm70.0 KGS
292312*18mm30*18mm85.0 KGS
305412*18mm30*18mm98.0 KGS


Tips on Drilling

1. Be Prepared

- Experienced, skilled drill operator

- Avoid improper bit handling, i.e. carbide against carbide damage

- Drill rig properly lubricated

- Sufficient drilling accessories on hand

- Keep accessories clean and free from damage

- Striking face is square and true

 

2. Starting the drill

- Firm footing for the drill

- Align and collar the hole properly

- Begin slowly and adjust the feed and throttle as the bit buries

 

3. Drilling

- Maintain enough rotation for good penetration

- Excessive rotation will wear the gauge

- Maintain correct feed pressure;

Insufficient air pressure leads to a loose drill string and premature wear

Sufficient air pressure is ideal to keep the bit from bouncing on the bottom

Too much pressure will buckle and bind the steel in the hole

Over feeding in hard rock will reduce penetration

Over feeding in soft rock can lead to burying the bit and hanging the steel

 

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