Home > Quality Control
Quality Control
1.2 Heat treatment control
Heat treatment will greatly improve the material strength and increase the thread wear life
of the rods and casings. We conduct either tru-wall or both ends heat treatment to the
tube body. After heat treatment, strength, hardness, straightness and concentricity of the
treated tubes will be tested in our lab.
1.3 Thread opening process:
Accuracy of threads will determine the use effects and life time of drill rod and casings.
CNC latches and form cutter are used in thread opening processing to minimize error
made by anthropic factors.
1.4 Additional thread treatment:
Surface of the threads will be cleaned to remove burr adhered after threads are opened.
Afterwards, the tread surface will be phosphated to improve surface conditions.
Contact Supplier
- Jinshi Drilltech Co.,Ltd
- Contact nameRen Chat Now
- AddressLubei district, Tangshan, Hebei
-
High Quality cloth scrap cutting machine
-
High Quality automatic textile waste cutting machine
-
Hot Sale textile waste recycling machine
-
Professional used waste textile recycling machine
-
High Quality textile shredding machine
-
Best Selling Waste cotton yarn cutting machine
-
mini CNC Lathe automatic high precision metal Slant Bed CNC lathe Machine for 2 Axis
-
Five-gallon blender
-
Customizable High Temperature Industrial Oven for Veterinary Instruments Treating and Drying Chamber with Hot Air
-
This 5 gallon blender is the one for you!
-
Quality Assurance Normal Temperature High Temperature Valve Butterfly General Steel Butterfly Valve
-
On Sale Customized Pneumatic Louver Damper Customized Pneumatic Louver Damper Customized Manual Louver Damper
-
twelve color dispensing machine
-
Five-gallon blender
-
Semi Automatic Glue Dispenser machine Solder Paste Liquid Dispensing Machine,solder paste dispenser
-
Customizable High Temperature Industrial Oven for Veterinary Instruments Treating and Drying Chamber with Hot Air
-
This 5 gallon blender is the one for you!
-
twelve color dispensing machine
-
Semi Automatic Glue Dispenser machine Solder Paste Liquid Dispensing Machine,solder paste dispenser
-
Cheap Multi-functional Semi-automatic Liquid Glue Dispenser doming machine
-
Semi Automatic Glue Dispenser machine Solder Paste Liquid Dispensing Machine,solder paste dispenser
-
Five-gallon blender
-
Evo-Tech XCL 60R/L(R)-3600/ S rigid chain for industrial lifting solution
-
Evo-Tech XCL 60R/L(R)-3600/ S rigid chain for industrial lifting solution