High Air Pressure Top Hammer Drill Bits , Flat Face QL50 140mm Down The Hole Bits

QL50-140mm (5 1/2")Button Bit DTH Bit For QL50 Hammer With Alloy Steel For Mine Application

Shanks: QL50

Application: Mining Drilling Hole Blasting

Button and Bit Face Shape Selection:

1. Flat Face

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.

2. 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.

3. Concave Face

The all-around application bit face specifically for medium hard and homogeneous rock formations.

1. Methods of Payment
T/T (Telegraphic Transfer) or Western Union or L/C at sight

2. Handling time for an order
Only 2 or 3 days if we have stock on your request size.
Based on order quantity, normally it takes 15 days for production.

3. Shipping way
Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: we suggest by air or by sea.

4. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for every order before shipping out.

5. After Services
(1). Our sales team will response for your question within 24 hours (Holidays Excluded)
(2). Technical Support will be available in any time
(3). Free replacement will provide once the failure confirmed caused by our product quality

6.How can we trust your company?
We support Alibaba trade insurance. Protecting products quality, shipment on time and your covered amount.

Any other questions,please feel free to contact with me online or by phone.