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Concentric hole types refer to bores that share a center, and achieving concentricity can be challenging for drilling operations. Gundrilling offers an individualized drilling process to create round and straight concentric hole types for various applications across many industries. See American Machine & Gundrilling (AMG) concentricity capabilities, how gundrilling fabrication provides advantages to concentric drilling and industrial applications that use concentric bores.
Individualized to the needs of your project, gundrilling provides excellent concentric hole boring capabilities. Producing concentric holes requires precision equipment with proven processes for bores that generate the intended result. Gundrilling capabilities for concentric hole types allow for concentricity within 0.001” while achieving high tolerance straightness, few deformities, and providing a repeatable process for identical fabrications. We pride ourselves on our exceptional gundrilling methodology to provide challenging and complex hole types with impressive technical specifications.
Gundrilling fabrication for concentric hole types offers several benefits that traditional drilling methods may have difficulty achieving. Providing a specialized drilling process, gundrilling for concentricity is tailored to the production needs of the component. Concentric bore drilling using gundrilling manufacturing methods provides a number of advantages, including:
Various industrial applications utilize concentric hole types. Gundrilling provides a precision drilling technique for creating round, straight, concentric bores. Efficiently producing repeatable bores, gundrilling processes manufacture concentric hole types for many applications including but not limited to:
Many industries also rely on applications featuring concentricity. Concentric hole types can be found in electronics and computer components applications, medical, mold manufacturing, and aerospace and automotive industries. Providing decades of technical experience and the latest in modified drilling equipment, our gundrilling operations can generate perfectly concentric hole types for several uses to your specifications.
AMG provides premium gundrilling fabrication for concentric bores. Using high-technology, modified equipment and offering decades of technical expertise and drilling experience, gundrilling for concentricity is specialized to the requirements of your component with highly repeatable processes. Additionally, we provide secondary services and engineering guidance to ensure the performance of your application or project. Contact us with questions on our concentric drilling capabilities or request a quote today.
Concentric Casing System With Ring Bits
Application Range
Applied to overburden formations with complex topographic and geological conditions, such as gravel, fissured formation, boulder, landfill of construction refuse, etc.
Drills at any angle;
Good straightness of borehole;
Maximum depth of borehole can reach 150 meters.
Structural Advantages
♦ Straightness: ensures the straightness of borehole in different topographic and geological conditions.
♦ Adaptability: ensures penetration efficiency in complex topographic and geological conditions, such as gravel and landfill of construction refuse.
♦ Lower torque: the system torque is less than eccentric casing system.
♦ Easy to unlock an re-rock: easy to re-rock after unlock.
♦ Drilling at any angle: concentric casing system can drill under horizontal, vertical and inclined conditions.
♦ Environmental: better than eccentric casing system, because of its advantages of drilling smoothly, small vibration and low noise, it is more suitable for construction in urban areas.
Component Parts
Casing Shoe Ring Bit Pilot BitUsed to connect the casing tube.
Used to connect the pilot bit and casing shoe.
The major structure of concentric casing system, with buttons and flushing grooves, etc.
Related Parts List
NO
Items
Description
1Casing Tube
a. Threaded casing tubejeft turning thread b. Welded casing tube
2Drill rod
Thread: API(REG/IF)/NC
3Stabilizer
Thread of stabilizer is in keeping with drilling pipe
4Hammer
Thread: API REG
5Concentric Overburden Drilling System
Regard the specification forms as below
Concentric Casing System With Rings(retrievable)
D
h
H
C
G
Part No.
O.D of Casing Tube (mm)
I.D of Casing
Tube (mm)
Wall thickness of Casing Tube (mm)
Max. O.D of Pilot Bit (mm)
Reamer Dia.(mm)
Max. O.D of Normal Bit (mm)
DTH Hammer
/TOP Hammer Type
Weight(Kg)Top Hammer Type
MDC76/7RR-01
76 62 7 57 84 39R32
3.2
MDC89/8RR-01
89 73 858 70 96 58 T38 5.8MDC114/10RR-01
114 94 10 92 122 80T45
KSQ Technology supply professional and honest service.
7.5MDC127/10RR-01
127 107 10 105 136 90T45
10MDC140/10RR-01
140 120 10 116 148 97T45/T51
15DTH Hammer Type
MDC114/10RR-02
114
94 10 92 122 80
COP34/DHD3.5
MDC127/10RR-02
127 107 10 105 13690
COP34/DHD3.5
16MDC140/10RR-02
140 120 10 116 148 97COP44/DHD340
/SD4/QL40
21MDC146/10RR-02
146 126 10 124 154 110COP44/DHD340
/SD4/QL40
22MDC168/12.7RR-02
168 142.6 12.7 141 180 125COP54/DHD350
/SD5/QL50/M50
27MDC178/12.7RR-02
178 152.6 12.7 150 186 135COP54/DHD350
/SD5/QL50/M50
32.5MDC194/12.7RR-02
194 168.6 12.7 166 202 145COP64/DHD360
/SD6/QL60/M60
42.5MDC219/12.7RR-02
219
193.6 12.7 191 228 170COP64/DHD360
/SD6/QL60/M60
58MDC245/12.7RR-02
245
219.6
12.7 214 254 195COP84/DHD380
/SD8/QL80
78MDC254/12.7RR-02
254 228.6 12.7 224 265 203COP84/DHD380
/SD8/QL80
84.5MDC273/12.7RR-02
273 247.6 12.7 241 286 223COP84/DHD380
/SD8/QL80
MDC325/12.7RR-02
325 299.6 12.7 292 338 276COP84/DHD380
/SD8/QL80
135MDC406/12.7RR-02
406 380.6 12.7 377 420 350QL120/DHD112/
SD12/NUMA120
280MDC508/12.7RR-02
508
482.6
12.7478
522
416
QL200/SD18/
NUMA180
522
MDC560/12.7RR-02
560534.6
12.7 528 575 475QL200/SD18/
NUMA180
620
MDC610/12.7RR-02
610584.6
12.7558
620
513QL200/SD18/
NUMA180
Contact us to discuss your requirements of Concentric Drilling System. Our experienced sales team can help you identify the options that best suit your needs.
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