Single/Conical Twin Screw & Barrel/Cylinder

• Material: 38crmoala
• Type: Round Head
• Groove: Pan
• Model NO.: SJ
• Connection: Hinged Bolts
• Head Style: Round
• Standard: BSW
• Grade: None
• Item: Single / Conical Twin Screw and Barrel
• Screw Quantity: Single or Twin
• Material for Optional: 38crmoaia Pr Skii etc
• Treatment: Nitraded and Chrome Plated
• Delivery Time: 30-50 Days
• Packing: Inner Film and Wooden Box Outside
• Diameter: Various: Single 25-250mm, Twin Screw 51-92mm
• Customerised Acceptance: Accepted
• Warranty: 1 Year
• Transport Package: Wooden Case
• Specification: International Standard
• Trademark: CX
• Origin: Zhangjiagang of China
• HS Code: 8477900000
• Production Capacity: 30, 000sets/Year

Product Description

Technical Parameter:

1. Material is 38CrMOALA, tempering hardness: 260-290HBS, Metallurgical structure: More than 95% sorbite, crystal particle degree: 6-8 grade, Nitridation layer depth: 0.4-0.7, Nitridation rigidity on surface: 940-1050HV, brittleness less than 2 grade; Linear degree meet national rubber&plastic machinery industry standard; Roughness degree: The surface which is touched with material shall be processed with fine honing, and the fine polishing can reach Ra value of 0.4-0.2; The screw spray welding's nickel-base alloy+WC, thickness: 2.6-3mm; Hardness: HRC62± 2, without crack and flaw; Make bottom part nitridation treatment;

2. Material is 3Cr2W8V, H13(injection chamber), the whole body quenching hardness: HRC60± 2, nitridation hardness: 1050HV, inner hold for fine grinding Ra value 0.4

3. Material: Cr12molvl, the whole body quenching hardness: HRC60± 2, inner hole for fine grinding Ra value 0.4;

4. Diffluencece combing, backflow parts material: Imported SKD61 quenching hardness: Above HRC55 or double alloy structure;

5. Can proceed to plate hard chrome after nitriding screw surface; The thickness for chromeplate is 0.03-0.04mm;

6. The passagewaypart for all kinds of mould, the thickness for plating hard chrome is 0.05-0.08, Polishing fine-coarse degree reach Ra value 0.4-0.2;

Single screw & barrel

Model	SJ25	SJ35	SJ45	SJ55	SJ65	SJ75	SJ90	SJ120	SJ150	SJ180	SJ200	SJ250	SJ300
diameter of screw (MM)	25	35	45	55	65	75	90	120	150	180	200	250	300
Ratio of L/D	8:1, 25:1, 28:1, 30:1, 33:1 for optional

Conical twin screw & barrel

Model	SJSZ51	SJSZ65	SJSZ80	SJSZ92
Diameter of screw (mm)	51	65	80	92
Length of the screw (mm)	105	132	156	188