Core Drill Bit, surface set diamond type, natural diamond type
natural diamond, coarse diamond
Coal mining, soft rock core drilling
soft to medium hard
40/60SPC, 20/30SPC, 10/15SPC, 60/80SPC
semi-round, 7 step drill bit, 5 step drill bit
Packaging & Delivery
carton boxes or wooden cases.
PQ HQ NQ BQ Surface Set Diamond Core Drilling Bits
This type of bit is primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations that are not effectively drilled by impregnated diamond bit. It is also recommended for use in drilling harder formations where the available rotary speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations.
In most cases, surface set diamond bits will provide higher rates of penetration than in softer formations due largely to the greater degree of exposure of the individual diamond crystals.
To choose a right surface set for the formations drilled, we need at least consider the following aspects: diamond size, diamond grade, profile design.
Principle of choosing diamond size--the harder the rocks, the smaller the diamond size should be.
Rule of selecting diamond grade--the harder the rocks, the better the diamond grade should be.
* Above is our ordinary ways of package and delivery.
* Or as per your requirements.
Q: Are you a manufacturer or trading company?
A: We are a specialized manufacturer.
Q: What are your main products, and used for?
A: Our products include core bit, PDC bit, reaming shell, core barrel, casing, drill rod, SPT equipment, Shelby sampler, drill rig and other drilling parts.
They are used for mineral exploration, geological drilling, geotechnical engineering and soil sampling.
Q: How about the delivery terms?
A: 1. Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before delivery.
2. Min. order quantity: 1 piece.
3. Transportation: By DHL/TNT/Fedex express, air, sea, train.
Q: How about discount?
A: Price is based on products and order quantity.
Q: Do you accept sample order?
A: Yes sure, please contact us for details.
Q: How about your after-sales service?
A: As a manufacturer, we offer promt technology support for all problems and questions. Besides, we accept goods return or replace for quality problem.
Q: Where is your factory located in?
A: Our factory is located in Changsha city, Hunan province, China.
Q: How does your company control the quality?
A: Quality first. In order to guarantee high quality for our products, Forsun always makes a serious inspection for all products and raw materials in strict procedure. We have obtained certificate of ISO9001:2000 in 2004.