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Foundation Drilling DTH Hammer Bits , Hole Size 3 ½ - 40 Inches Rock Drill Bits

Date: 2021-08-11
照片 671_a.jpg
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Model
Numa DHD SD QL
Carbides Shape:Spherical, Ballistic, Parabolic And Conical
Bit Diameter3 ½ To 40 Inches
Appliance:DTH Hammer | Foundation Drilling | Rock Drilling Tools
Processing TypeForging
DTH BIT ColorBlack, Red, Gold, Blue, Grey And Etc
Matched HammerNuma DHD SD QL DTH Hammer


DTH Hammer | Foundation Drilling | Rock Drilling Equipment With DTH Bit Hole Size From 3 ½ to 40 inches

 

DTH solutions for large holes--Where there’s solid rock and a need for large diameter holes, then the most efficient method of drilling the holes are DTH hammers.

 

1. About Changsha Tianhe Drilling---

Manufacturer---rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, tophammer button bits, coupling, cross bits, drill rods located in Changsha, Hunan, China.
Experience--in this field of DTH hammers and bits for 20 years.

Export countries---our customers from all over the world, such as France, Spain, Italy, South Africa, Iran, Malaysia, Australia ad etc.

 

2. Changsha Tianhe Brand Teamwhole DTH bit

Made from premium alloy steel and high quality tungsten carbide.

Heat treated and shot peened to deliver a durable and reliable balance of strength and toughness.

Large bit forgings are individually ultrasonically tested and screened for inclusions and flaws.

Specially designed bits for kinds of rock formation

Multiple varieties of head, face, shank and inserts available.

Advanced flow simulation used to improve chip removal and reduce noise.

3. DTH Bit specification

Drill BitBit Dia.(mm)NO.AirGaugeFrontWeight(Kg)Part No.
HolesButtonsButtons
SD10254312*Φ1820*Φ16108SD10-254
305412*Φ1836*Φ16125SD10-305
311412*Φ1836*Φ16130SD10-311
318412*Φ1836*Φ16142SD10-318
330416*Φ1842*Φ16155SD10-330
Numa100254312*Φ1820*Φ1690Numa100-254
305412*Φ1836*Φ16102Numa100-305
311412*Φ1836*Φ16104Numa100-311
318412*Φ1838*Φ16106Numa100-318
330414*Φ1842*Φ16112Numa100-330
DHD112305412*Φ1836*Φ16152DHD1120-305
311412*Φ1836*Φ16157DHD1120-311
330416*Φ1842*Φ16165DHD1120-330
356416*Φ1942*Φ16178DHD1120-356
381416*Φ1942*Φ18198DHD1120-381
SD12305412*Φ1836*Φ16156SD12-305
311412*Φ1836*Φ16168SD12-311
330416*Φ1842*Φ16180SD12-330
356416*Φ1948*Φ16191SD12-356
381416*Φ1948*Φ18200SD12-381
NUMA120305412*Φ1836*Φ16152N120-305
311412*Φ1836*Φ16158N120-311
330416*Φ1842*Φ16165N120-330
356416*Φ1948*Φ16178N120-356
381416*Φ1948*Φ18195N120-381
NUMA125 TK14 HYPER141381420*Φ1954*Φ18297NUMA125--381
406420*Φ1958*Φ18311NUMA125--406
431420*Φ1964*Φ18324NUMA125--431
445424*Φ2072*Φ18334NUMA125--445
470424*Φ2080*Φ18347NUMA125--470
495424*Φ2088*Φ18710NUMA125-495
TK18/NUMA180/TH18495424*Φ2088*Φ18710NUMA180-495
525424*Φ20100*Φ18760NUMA180-525
580424*Φ20116*Φ18855NUMA180-580
660428*Φ20140*Φ19950NUMA180-660
680428*Φ20144*Φ19968NUMA180-680
TH24/NUMA240711428*Φ20154*Φ191455NUMA240-711
762432*Φ20172*Φ191539NUMA240-762
780432*Φ20180*Φ191564NUMA240-780
825436*Φ20216*Φ191625NUMA240-825
998440*Φ20348*Φ191980NUMA240-998
TH28800654*Φ2066*Φ20+90*Φ181363TH28-800
900660*Φ2066*Φ20+105*Φ181536TH28-900
1000668*Φ2074*Φ20+123*Φ181804TH28-1000
1100676*Φ2284*Φ20+140*Φ182117TH28-1100
1200686*Φ2296*Φ20+159*Φ182300TH28-1200

 

4. Bit Face Shape Selection:

1) Drop Center Bit

----For high penetration rates in soft to medium hard and fissured rock formations. 

2) Concave Face

----The all-around application bit face specifically for medium hard and homogeneous rock formations.     Good hole deviation control and good flushing capacity.

3) Convex Face

----For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce theload and wear on the gauge buttons, but poor hole deviation control.

4) Flat Face Bit

----This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.

 

5. Carbide Button Shape Selection:

1. Semi-Ballistic Buttons

2. Ballistic Button

3. Spherical Button

4. Two-step Button

 

6. Photos

照片 648_a.jpg

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