Screw&Barrel for Rubber Extruded Machine

• Customization: Available
• After-sales Service: at Random
• Warranty: 1year
• Model NO.: screw diameter 20mm-300mm
• Condition: New
• Customized: Customized
• Automatic Grade: Semiautomatic
• Structure: Horizontal
• Leading Time: 35-45days
• Application: Extruder
• Ratio L/D: 15-55
• Diameter: 20-300mm
• Nitrided Layer Thickness: 0.55-0.70mm
• Steel Material: 38crmoaia
• Surface Roughness: Ra0.4
• Warranty and Service: 1 Year
• Delivery Ways: by Sea or by Air
• Hardness of Nitrided Layer: Hv950-1000
• Transport Package: Wood Case
• Specification: ISO9001: 2008
• Trademark: DONGBIN
• Origin: China
• HS Code: 84779000
• Production Capacity: 5000

Product Description

Standard
Diameter:φ20-φ300mm
Ratio of length to diameter:L/D=15-55


Materials
38CrMoAIA/SACM645/SKD11/SKD61/42CrMo
Duplex stainless Steels
GH3#
Power Metallurgy Raw Material
Cold/Thermal Spray Hard Metal Process
Advanced Nitriding Process
Corrosion&Abrasion Resistance Bimetal Spraying Process
 

Technical Index

Product	Screw&Barrel
Tempering hardness	HB240-280
Hardness of nitrogen treatment	HV950-1000
Depth of nitrogen layer	0.55-0.70
Nitrided brittleness	Less than grade 1
Surface roughness	Ra 0.4
Screw straightness	0.015mm
Hardness after nitriding	≥900HB
Chromium-plating depth	0.05-0.10mm
Alloy hardness	HRC55-62
Alloy Depth	1.5-2.0mm

 
Production Process as below:
01 Blanking-02 Quenching and Tempering-03 RoughTurning-04 Detecting-05 Semi Finishing Turning-06 Aging Treatment-07 Rough Grinding
08 Crossed Thread-09 Milling Cutter Roove-10 Turning Thread Groove-11 Tempering-12 Polishing Thread Groove-13 Fine Gringding-14 Milling Keyway-15 Fitter-16 Detecting-17 Nitriding or Bimetallic Treatment-18 Cut Off Process Allowance-19 Polishing Thread Groove-20 Detecting

 
Our Service
Warranty and service: 1years
 
 
Our Advantages
1)Excellent raw materials
2)Good customer service
3)Rapid delivery
4)Reasonable price
5)Production quickly