Pump Screw for Heavy Oil Screw Pump Spindles / Shaft / Screws

• Customization: Available
• Standard: DIN, ASTM, GOST, GB, JIS, ANSI, ISO
• Technics: Milling-Drilling-Grinding-Polishing
• Material: Tool Steel, Structural & Engineering Steel etc.
• Base Material: 1.8509, 1.8550, 1.8519, 4140, 5140, 45
• Surface Treatment: Bimetallic, Nitriding, Through-Hardened, Chrome-Pl
• Hardness for Nitriding: >Hv900
• Hardness for Bimetallic: HRC50~70 Depending on Different Alloys
• Thickness of Nitriding Layer: 0.4~0.7mm
• Thickness of Bimetallic: 1.5~3.0mm Depending on Different Alloy Coating
• Alloy Type: Ni60, Colmonoy 56, Colmonoy 83, Tungsten Alloy
• Application: Plastic Extrusion Machines
• Transport Package: Export Packaging
• Specification: Screw Diameter from 15.6mm to 250mm
• Trademark: EJS or Customized
• Origin: China
• HS Code: 847790
• Production Capacity: 30000PCS/Year

Product Description

1.About E.J.S.
EJS is a newly created brand name for Export business with manufacturing experiences since 1992.
Our mission is to make the screw barrel import work Easier with Joy and bigger Success for our customers internationally.




2.  Product Details
1) Base materials
Our common materials include 42CrMo(4140Steel), 38CrMoAlA(1.8509), 31CrMoV9(1.8519), 34CrAlNi7(1.8550), 40Cr, 45Steel,
SS304, SS416, SKD11, SKD61,. Other materials are possible, please contact us for further details.

2) Surface treatments
Including: quenching & tempering, nitriding, hard chrome-plated, bimetallic alloy coating, through hardened.
 

Bimetallic Barrels
Alloy Type		EJS01 Alloy	EJS02 Alloy	EJS03 Alloy	EJS04 Alloy
Alloy Components		Fe+Ni+Cr+B (Fe:65, Ni:14, Cr8, B:3.5)	Ni+Cr+Co+B	Ni+Cr+Co+V+B	Ni+Wc+Cr+B (Ni:50, Wc:15~35,Cr:6~8, B:2.5~3.2)
Wearing Resistance		★★★	★★	★★★	★★★★
Corrosion Resistance		★★	★★★	★★★	★★★
Alloy Thickness		2-3mm	1.5~2mm	1.5~2mm	1.5~2mm
Hardness		HRC 58~65	HRC 50~58	HRC 55~60	HRC 55~65
Temperature Range		≤400	≤450	≤450	≤600
Coefficient Thermal	RT~250ºC	11.0x10-6	11.0x10-6	11.5x10-6	11.0x10-6
Expansion(/ºC)	RT~400ºC	11.4x10-6	11.4x10-6	12.4x10-6	12x10-6
Range of Workable Length		700mm~3000mm/piece
Base Steel Vastly Used		40Cr, 42CrMo
Mark in the list: ★★★★ Excellent; ★★★ Very Good; ★★Good

 

Bimetallic Screws
Suitable for	Single Screw, Twin Parallel Screw, Twin Conical Screw
Alloy Type	Ni60	Colmonoy 56	Colmonoy 83
Alloy Components	Ni+Cr+Fe+Si (Ni:65, Cr:17, Fe:15, Si:5)	Ni+Cr+Si+Fe (Ni: 68, Cr:18, Si:5, Fe:5)	Ni+Wc+Cr+C (Ni:40, Wc:34, Cr:20, C:2)
Anti-Wearing Level	★★★	★★★	★★★★
Anti-Corrosion Level	★★★★	★★★★	★★★★
Alloy Thickness	1~1.5mm	1~1.5mm	1~1.5mm
Hardness	HRC 56~62	HRC 46~61	HRC 43~48
Applied Glass Fiber	Under 10%
Range of Workable Length	Any length needed
Base Steel Vastly Used	38CrMoAl(1.8509), 34CrAlNi7(1.8550), 31CrMoV9(1.8519)
Mark in the list: ★★★★ Excellent; ★★★ Very Good; ★★Good

3.  E.J.S Workshop




4. EJS Bimetallic Machine

1) New PTA welding mahine for screws:

 

 2) Centrifugal casting machine for barrels 

5.  Quality Inspection
We take only first-class steel and check every production procedure to ensure every dimension is produced precisely. A final complete inspection will be executed before dispatch.




6. Packaging
We use strong plywood or wooden case for all our products



7. Our Advantages

1) Quality always comes first. Our experienced workers pay attention to every tiny procedure during the production and inspection, to ensure the precision of every dimension. 

2) Service makes us outstanding. Our sales people are trained on the products every day. They are always ready to answer your questions and offer the best solutions in fluent English at any time.

3)  Provide an easier working way. With 6 years export experience, we E.J.S offer before-sales, prouction update, after-sales one stop service, which gives all our customers an easier way to work with us. We welcome you to visit our factory at any time.



8. Our market
Through years of developing, we have happy customers all over the world with main market in Europe, South America, Asia, Middle East, ect.
We look forward to working with you now and forever!