SKH Series Co-Rotating Parallel Twin-Screw Gearbox (Torque Class 18)

Core Design Philosophy

Technical Specifications

Model	Center Distance	Torque Class	Output330	Output400	Output500	Output600	Output800	Output900
			Motor Power(KW)	Motor Power(KW)	Motor Power(KW)	Motor Power(KW)	Motor Power(KW)	Motor Power(KW)
SKH35	30	＜18	35	42	52	63	84	95
SKH50	42	＜18	95	112	140	170	230	255
SKH65	52	＜18	185	213	270	320	430	485
SKH75	60	＜18	280	330	410	490	660	740
SKH95	78	＜18	600	715	880	1050	1400	1600

Structure & Configuration

📌Housing

The housing structure is engineered to absorb operational noise. Manufactured from high-quality gray cast iron and ductile iron with full aging treatment, it offers excellent rigidity and a smooth finish. Advanced multi-axis machining ensures high precision and long-term stability.

⚙️Gears

Gears are produced from high-strength alloy case-hardening steels (20CrMnMo, 20CrNi2MoA, 20Cr2Ni4A). After carburizing and quenching, tooth surface hardness reaches HRC 58–62. Precision grinding achieves gear accuracy up to Grade 5–6 (ISO 1328-1:1995). Key components undergo surface strengthening with tooth profile and helix modifications to ensure optimal meshing under load, resulting in low noise and high efficiency.

🔧Bearings

Bearings are sourced from leading domestic and international brands, including ZWZ, FAG, INA, TWB, SKF, NSK, and NTN.

🛡️Seals

Oil seals are primarily imported from established brands such as CTY (Germany) and SOG (Taiwan).

🫙Lubrication

The gearbox is equipped with a forced cooling lubrication system, high-efficiency brazed plate heat exchangers, flow meters, temperature sensors, and pressure gauges to ensure reliable thermal manageme表等。

[Assembly View – SKH Gearbox Before Shipment]

Applications

1.Engineering Plastics Alloys & High-Performance Compounding

• Material Systems: PA66/PPO, PC/ABS, PP/PA, PET/PP alloys
• Process: Medium-temperature extrusion, tensile flow field, enhanced interfacial bonding
• Advantages: Uniform dispersion, improved mechanical properties, minimal degradation
• Typical Products: Automotive structural parts, electronic housings, high-temperature structural components

2.High-Filling Compounding & Pelletizing

• Material Systems: PP/PE + CaCO₃, talc, glass fiber, flame retardants
• Filling Ratio: Stable material conveying at filler levels exceeding 50%
• Advantages: No slippage, no agglomeration, uniform plasticization, low energy consumption
• Typical Products: Injection-molding grade pellets, sheet/base materials, pipe compounds

3.Nano & Functional Masterbatches

• Material Systems: Nano SiO₂, montmorillonite, graphene, carbon nanotubes
• Advantages: Tensile flow field breaks agglomeration, dispersion quality significantly superior to conventional twin-screw systems
• Typical Products: Antistatic masterbatch, barrier masterbatch, reinforced masterbatch, high-concentration color masterbatch

4.Biodegradable Materials

• Material Systems: PLA, PBAT, PBS, starch-based, bamboo/flour fiber composites
• Advantages: Low shear, minimal chain scission, excellent venting, no odor
• Typical Products: Biodegradable film, food containers, disposable packaging, agricultural mulch film

5.Pipe & Profile Extrusion

• Product Range: HDPE water supply pipes, MPP power conduits, CPVC conduits, PPR pipes
• Advantages: Uniform plasticization, stable wall thickness, smooth surface finish, minimal bubble content
• Benefits: Higher yield, increased output, reduced energy consumption

6.Rubber & Elastomer Compounding

• Material Systems: Tire rubber, sealing strip compounds, TPE/TPR, reclaimed rubber
• Advantages: Intensive mixing, low overheating
• Benefits: Output increased by approximately 50%, energy consumption reduced by approximately 30%

Have questions? Ask our engineer directly.