Diamond core drill bits for hard rock,coal mine core drill bit

Specifications coal mine core drill bit:

1.Laser welding segments.

2.Dia.25mm-355mm.

3.Full length:300-450mm.

4.OEM

  1. coal mine core drill bit for Stone : 2. Products Descriptions: coal mine core drill bit : 1) Good for reinforcement concrete and asphalt and bricks etc. 2) Silver or laser welding segmented type 3) Long Drill,from 300mm-450mm in total lenght  4) Diamond from 32mm-355mm. Other sizes are available. 5) Connection: 11/4 UNC or any other thread. 6) Our Quality has been approved by European & American market for many years. 7) We can offer our clients good after-sale service and professional technical assistance. 3. Specification Info: 

Diameter	Full Length	Segments Size	Teeth	Connection
Φ32mm	400/450mm	16x3x9mm	4	1-1/4”-7
Φ52mm	400/450mm	24x3.5x9mm	4	1-1/4”-7
Φ57mm	400/450mm	24x3.5x9mm	5	1-1/4”-7
Φ62mm	400/450mm	24x3.5x9mm	5	1-1/4”-7
Φ67mm	400/450mm	24x3.5x9mm	6	1-1/4”-7
Φ72mm	400/450mm	24x3.5x9mm	6	1-1/4”-7
Φ77mm	400/450mm	24x3.5x9mm	6	1-1/4”-7
Φ82mm	400/450mm	24x3.5x9mm	7	1-1/4”-7
Φ87mm	400/450mm	24x3.5x9mm	7	1-1/4”-7
Φ92mm	400/450mm	24x3.5x9mm	8	1-1/4”-7
Φ102mm	400/450mm	24x4x9mm	9	1-1/4”-7
Φ107mm	400/450mm	24x4x9mm	9	1-1/4”-7
Φ112mm	400/450mm	24x4x9mm	9	1-1/4”-7
Φ122mm	400/450mm	24x4x9mm	10	1-1/4”-7
Φ127mm	400/450mm	24x4x9mm	10	1-1/4”-7
Φ132mm	400/450mm	24x4x9mm	10	1-1/4”-7
Φ152mm	400/450mm	24x4x9mm	12	1-1/4”-7
Φ178mm	400/450mm	24x4x9mm	13	1-1/4”-7
Φ202mm	400/450mm	24x4x9mm	14	1-1/4”-7
Φ254mm	400/450mm	24x4.5x9mm	18	1-1/4”-7
Φ305mm	400/450mm	24x5x9mm	24	1-1/4”-7
Φ350mm	400/450mm	24x5x9mm	28	1-1/4”-7

Other specifications are available upon clients' request  Packaging & Shipping   4. Packing and Shipping: 1. Each diamond bits well drilling is packed in an inner cardboard case . 2. Normally we can make shipment within 7-15 days after receiving your payment or L/C. 5.Payment: 1.T/T: in advance or 30% payment in advance and the rest 70% before shipping. 2. L/C: irrevocable L/C at sight. 3. Western Union,MoneyGram: 30% payment in advance and the rest 70% before shipping. 4.Paypal: 30% payment in advance and the rest 70% before shipping, and customer pay 5% bank fees FAQ   6.FAQ: Q: How to place order to your company? A: 1. Inquiry-Professional quotation.      2. Confirm the price, lead time, logo, payment term etc.      3. Hizar sales send the Proforma Invoice with seal.      4. Customers make the payment as a deposit and send us Bank receipt. Our Services   7.Our Services: 1. Low MOQ:It can meet your trial order need well. 2. OEM Accepted:We can produce according to your sample or drawings. 3. Good Service: We treat our clients as God with high professionalism and passion. 4. Good Quality: We have strict quality control system .Good reputation in the market. 5. Fast & Cheap Delivery:We have big discount from forwarder (Long Contract & Big volume). 8. Our Stock:  9. Production Flow: 10.Certificate: Company Information   11. Company Info: Established in 1983, Suzhou Hizar Machinery & Tool Co. Ltd has been acting as one of leading manufacturers in China’s stone processing industry.   Contact me now!