Gear Pump Group 1
The BG1 gear pump is a compact, powerful medium-sized hydraulic pump used in numerous industrial and mobile applications. It delivers reliable, consistent flow and is ideal for systems with low to medium flow requirements. Thanks to its robust design, high availability and versatile connection options, the BG1 series is one of the most commonly used gear pumps in machine and vehicle construction. In the LöSi® webshop, you will find a wide selection of designs, delivery volumes and directions of rotation for optimal integration into your hydraulic system.
What is a Gear Pump BG1?
The gear pump of Group 1 (BG1) is the proven standard in the compact performance class. It closes the gap between micro-pumps and large tractor pumps.
These pumps operate according to the external gear principle and are characterized by a lightweight aluminum housing combined with high pressure resistance. They are the first choice when flow rates in the lower to medium range (approx. 6 to 40 liters/min depending on speed) are required, but installation space is limited.
Advantages of Our Group 1 Gear Pumps
The BG1 series is a "volume model" – which means for you: Mature technology at very economical prices. It is robust enough for rough everyday use and precise enough for control tasks.
Why BG1 is the right choice:
- Power Density: Despite compact dimensions, operating pressures up to approx. 220 bar (often higher in peak) are possible.
- Standardization: Thanks to standardized flanges (e.g., Euro standard), replacing defective pumps is usually "Plug & Play".
- Efficiency: High volumetric efficiency ensures that the motor power is optimally converted into hydraulic force.
- Durability: Simple plain bearings, lubricated by the hydraulic oil, make the pump virtually maintenance-free.
Typical Areas of Application for the Gear Pump BG1
Group 1 is the "engine" of many applications we encounter daily. It is particularly frequently found in systems that need to be mobile and light:
- Hydraulic Power Units: The classic in lifting platforms, lift tables, and workshop presses (Power Packs).
- Agricultural Technology: In vineyard tractors or as an auxiliary pump in large tractors.
- Forestry: Drive of smaller log splitters and winches.
- Municipal Technology: Steering hydraulics in sweepers and light commercial vehicles.
Selection Criteria & Technical Data
To find the right BG1 pump, the flange pattern and displacement must match exactly.
Pay attention to these identification features:
- Displacement: The spectrum ranges from approx. 1 cm³/rev to 14 cm³/rev. (Rule of thumb: The larger the volume, the faster the cylinder, but the more power the drive motor requires).
- Flange: The standard is the 4-bolt Euro flange (hole spacing often 72x52 mm or 25.4 mm centering). Check the dimensions!
- Shaft: Mostly tapered 1:8 (with woodruff key) for standard motors or jaw coupling for electric motors.
- Connections: Often designed as flange connection (bolt circle 30mm) or threaded connection (BSP).
Tip: Do not confuse BG1 with BG2. Measure the centering collar – for BG1 it is usually 25.4 mm or 30 mm, for BG2 it is 36.5 mm.
Select & Order Gear Pump BG1 Now
Find the suitable replacement for your power unit. Discover our BG1 series with all common shaft and flange variants.
Use our filters for cm³/rev and direction of rotation (Left/Right). Inform yourself now and order compact hydraulic power directly online!
