SGP1A30D2H5-R Shimadzu Gear Pump | 29.9cc 206 bar for Forklift

Product Overview

The SGP1A30D2H5-R, SGP1-32F1H1-L, SGP1A32F1H5-L, and SGP1A32F1H5-R are representative models of the SHIMADZU SGP1 series high-performance external hydraulic gear pumps. The SGP1 series offers displacements ranging from 16.2 to 36.6 cc/rev across 10 variants (SGP1-16 through SGP1-36), widely used in forklifts, construction machinery, agricultural equipment, and more.

The SGP1 series gear pump features automatic axial clearance compensation and radial hydraulic balance. With a three-piece construction design, the pump incorporates DU bushings (self-lubricating bearings) in the bearing blocks and bimetallic side plates; the front and rear covers are aluminum die-castings while the center section is cast iron. This precision-engineered combination effectively enhances performance and reliability.

Engineered as a direct OEM-replacement solution, these models fully comply with SHIMADZU original design standards and mounting interface specifications, offering 100% direct interchangeability with OEM pumps. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.

Model Code Breakdown (Bulleted List) :

SGP1A30D2H5-R

• SGP1 — Series: SHIMADZU SGP1 External Gear Pump

• A — Flange pilot size specification (Type A: φ82.55-0.05)

• 30 — Nominal displacement: 30 cc/rev (actual 29.9 cc/rev)

• D — Port position: D = Rear ports

• 2 — Port configuration code

• H — Mounting: Horizontal 2-bolt

• 5 — Shaft type: SAE spline shaft, 10 teeth

• R — Rotation: Right-hand (clockwise, viewed from shaft end)

SGP1-32F1H1-L

• SGP1 — Series: SHIMADZU SGP1 Series

• 32 — Nominal displacement: 32 cc/rev (actual 33.2 cc/rev)

• F — Port position: F = Side ports (on rear cover)

• 1 — Port configuration: Flange ports (side only)

• H1 — Mounting: Horizontal 2-bolt

• L — Rotation: Left-hand (counter-clockwise, viewed from shaft end)

SGP1A32F1H5-L

• SGP1 — Series: SHIMADZU SGP1 Series

• A — Flange pilot size specification (Type A: φ82.55-0.05)

• 32 — Nominal displacement: 32 cc/rev (actual 33.2 cc/rev)

• F — Port position: F = Side ports (on rear cover)

• 1 — Port configuration: Flange ports (side only)

• H5 — Mounting configuration code

• L — Rotation: Left-hand (counter-clockwise, viewed from shaft end)

SGP1A32F1H5-R

• SGP1 — Series: SHIMADZU SGP1 Series

• A — Flange pilot size specification (Type A: φ82.55-0.05)

• 32 — Nominal displacement: 32 cc/rev (actual 33.2 cc/rev)

• F — Port position: F = Side ports (on rear cover)

• 1 — Port configuration: Flange ports (side only)

• H5 — Mounting configuration code

• R — Rotation: Right-hand (clockwise, viewed from shaft end)

Technical Specifications 

SGP1 Series General Specifications

• Series: SHIMADZU SGP1 External Gear Pump

• Displacement Range: 16.2 – 36.6 cc/rev (10 variants)

• Rated Pressure: 20.6 MPa (approx. 206 bar)

• Peak Pressure (Maximum): 24.5 MPa (approx. 245 bar)

• Inlet Pressure: -0.02 ~ 0.2 MPa

• Inlet Port: Ø25 mm / PT 1″

• Outlet Port: Ø19 mm / PT 3/4″

• Housing Material: Aluminum (front/rear covers) / Cast iron (center section)

• Bearing Type: DU bushings (self-lubricating)

• Side Plate Material: Bimetallic

• Construction Type: Three-piece construction

• Weight Range: 3.3 – 4.5 kg

SGP1A30D2H5-R Specific Specifications

• Model: SGP1A30D2H5-R

• Displacement: 29.9 cc/rev

• Rated Pressure: 20.6 MPa (approx. 206 bar)

• Peak Pressure: 24.5 MPa (approx. 245 bar)

• Maximum Speed: 3000 rpm

• Minimum Speed: 400 rpm

• Rotation Direction: Right-hand (clockwise, viewed from shaft end)

• Weight: 4.1 kg

SGP1-32F1H1-L Specific Specifications

• Model: SGP1-32F1H1-L

• Displacement: 33.2 cc/rev

• Rated Pressure: 20.6 MPa (approx. 206 bar)

• Peak Pressure: 24.5 MPa (approx. 245 bar)

• Maximum Speed: 3000 rpm

• Minimum Speed: 400 rpm

• Rotation Direction: Left-hand (counter-clockwise, viewed from shaft end)

• Weight: 4.2 kg

SGP1A32F1H5-L Specific Specifications

• Model: SGP1A32F1H5-L

• Displacement: 33.2 cc/rev

• Rated Pressure: 20.6 MPa (approx. 206 bar)

• Peak Pressure: 24.5 MPa (approx. 245 bar)

• Maximum Speed: 3000 rpm

• Minimum Speed: 400 rpm

• Rotation Direction: Left-hand (counter-clockwise, viewed from shaft end)

• Weight: 4.2 kg

SGP1A32F1H5-R Specific Specifications

• Model: SGP1A32F1H5-R

• Displacement: 33.2 cc/rev

• Rated Pressure: 20.6 MPa (approx. 206 bar)

• Peak Pressure: 24.5 MPa (approx. 245 bar)

• Maximum Speed: 3000 rpm

• Minimum Speed: 400 rpm

• Rotation Direction: Right-hand (clockwise, viewed from shaft end)

• Weight: 4.2 kg

Key Technical Advantages

1. Automatic Axial Clearance Compensation & Radial Hydraulic Balance
The SGP1 series features advanced automatic axial clearance compensation and radial hydraulic balance technology, automatically adjusting internal clearances under varying operating pressures to minimize internal leakage and maintain high volumetric efficiency across the full pressure range.

2. Three-Piece Construction with DU Bushings – Long Life & High Reliability
The three-piece construction design incorporates DU bushings (self-lubricating bearings) in the bearing blocks and bimetallic side plates. DU bushings provide excellent self-lubrication and wear resistance; combined with bimetallic side plates, they significantly extend pump service life. The pump has passed one million impulse fatigue tests at 24.5 MPa, demonstrating exceptional durability.

3. Aluminum + Cast Iron Hybrid Construction – Lightweight & High Strength
The front and rear covers are aluminum die-castings while the center section is cast iron. This material combination delivers structural strength while achieving lightweight design (just 3.3–4.5 kg total weight), effectively reducing overall machine weight.

4. High Efficiency & Low-Noise Operation
Precision-engineered construction enables the SGP1 series to maintain high volumetric and mechanical efficiency. The aluminum body with high-precision molding design ensures low-noise operation.

5. Wide Displacement Coverage & Flexible Configuration Options
The SGP1 series offers 10 displacement options from 16.2 to 36.6 cc/rev. Flexible combinations of port positions (D: Rear / F: Side), mounting types, shaft types, and rotation directions (L: Left / R: Right) are available.

6. OEM-Proven Reliability
The SGP1 series is extensively used as OEM components for forklifts, construction machinery, and agricultural equipment, demonstrating proven reliability in the most demanding work cycles.

7. 100% Factory Tested & Direct Interchangeability
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation. Fully compliant with SHIMADZU original design standards, with flange dimensions, shaft specifications, and mounting interfaces identical to OEM pumps—direct drop-in replacement with zero modifications required.

Application Areas

The SGP1 series gear pumps are widely used in the following equipment:

• Forklifts: Hydraulic lifting systems, steering systems

• Construction Machinery: Excavators, loaders, road rollers, cranes

• Agricultural Machinery: Tractors, combine harvesters, sprayers, agricultural, forestry and fishery machinery

• Material Handling Equipment: Stackers, handling machinery

• Industrial Vehicles: Industrial vehicles

• Mining Machinery: Mining equipment hydraulic systems

Expert Maintenance Tips

1. Model Confirmation
The SGP1 series includes multiple displacement variants and configuration combinations. Before installation, verify the complete model code on the original pump nameplate—pay special attention to displacement code (16/18/20/23/25/27/30/32/34/36), port position (D/F), mounting type, and rotation direction (L/R).

2. Rotation Direction Confirmation

• Suffix “R” indicates right-hand rotation (clockwise, viewed from shaft end)

• Suffix “L” indicates left-hand rotation (counter-clockwise, viewed from shaft end)

Before installation, always verify that the PTO rotation direction of the host machine matches the pump’s rotation direction—incorrect rotation will result in pump failure to prime and may cause severe damage to gears and bearings within a short period.

3. Installation Precautions

• Thoroughly clean the mounting flange and shaft mating surfaces before installation to ensure no debris remains

• SGP1 series features horizontal 2-bolt mounting

• Use specified torque values for mounting bolts—avoid over-tightening which may cause distortion of the aluminum housing

• Ensure correct connection of inlet port (Ø25 / PT 1″) and outlet port (Ø19 / PT 3/4″)

4. First Start-Up and Bleeding

• Before first start-up, must fill the pump with hydraulic oil through the inlet port—never start dry

• After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system

• Check for abnormal noise or leakage—aluminum housing pumps are particularly sensitive to cavitation

5. Fluid and Filtration

• Use high-quality anti-wear hydraulic oil compliant with ISO VG 32–68 grades

• Maintain inlet pressure within -0.02 ~ 0.2 MPa range

• Maintain system oil cleanliness with filtration ≤ 25 μm recommended

• Maintain operating temperature within recommended range

6. Periodic Maintenance

• Check mounting bolt torque every 1,000 operating hours

• Regularly monitor system operating pressure—not to exceed 20.6 MPa rated pressure (24.5 MPa peak)

• The SGP1 series is known for long service life and low maintenance requirements—nevertheless, regularly inspect shaft seals to prevent leakage

• If flow output decreases, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly