Product Overview The HG1 Series operates on the internal gear principle, where an inner pinion drives an outer internal gear ring. This design features a longer sealing arc and specialized compensation mechanisms that dramatically reduce pressure ripples. The result is a hydraulic pump that operates smoothly even at high pressures, ensuring precise control and protecting downstream components from vibration fatigue.
Why Choose the HG1 Series?
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Ultra-Low Noise: Significantly quieter than external gear pumps and vane pumps, improving the working environment.
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High Efficiency: Radial and axial pressure compensation ensures high volumetric efficiency is maintained over a long service life.
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Low Pulsation: The smooth flow output improves the surface finish of machined parts in hydraulic tool applications.
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Durability: Capable of handling high-pressure hold cycles common in clamping and pressing applications.
Common Applications:
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Plastic Machinery: Injection molding machines (Clamping/Injection).
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Metal Forming: Hydraulic press brakes, Shears, Punching machines.
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Material Handling: Forklifts and Lifts.
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Machine Tools: CNC machining centers.
| Specification | Value / Description |
| Product Type | Internal Gear Pump (High Pressure) |
| Series | HG1 (Size 1) |
| Displacement Range ($V_g$) | 6.3, 8.0, 10.0, 12.5, 16.0, 20.0, 25.0, 32.0 cm³/rev |
| Continuous Pressure | 210 bar (Standard) / 250 bar (High Pressure Models) |
| Peak Pressure | Up to 315 bar |
| Max. Speed ($n$) | 1800 – 3600 rpm (depending on displacement) |
| Min. Speed | 600 rpm |
| Fluid Temperature | -10°C to +80°C |
| Common Part Numbers |
Model Code: HG1 – [Disp] – [Shaft/Port] – [Rotation] HG1-25-01R-VPC (25cc, Standard Shaft, Right Rotation) HG1-32-01R-VPC (32cc, Standard Shaft, Right Rotation) HG1-40-01R (Note: 40cc sometimes falls into HG1 or HG2 depending on brand) HG1-50-01R (Similar to Sumitomo QT52) HG1-63-01R (Similar to Sumitomo QT62) Note: “R” = Clockwise, “L” = Counter-Clockwise. |
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