Types of Lubrication Pumps — A Complete Guide

The pump is the heart of any lubrication system. It draws lubricant from the reservoir and delivers it under pressure to the distribution lines and ultimately to every friction point on the machine. Choosing the right type of pump depends on the lubricant type (oil or grease), required pressure, number of lubrication points, and whether automation is needed.

1. Hand Operated Pump

A manually operated pump driven by a hand lever. Each stroke of the lever delivers a fixed volume of oil to the lubrication circuit.

  • Best for: Small machines, infrequent lubrication intervals, low budget installations.
  • Lubricant: Oil.
  • Output: Low volume per stroke.

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2. Motorised Lubrication Pump / Unit

An electrically driven pump with a built-in motor and reservoir. A timer or controller triggers the pump automatically at set intervals. The most common type for automated centralized lubrication on machine tools.

  • Best for: CNC machines, machining centres, automated production lines.
  • Lubricant: Oil.
  • Output: Adjustable — controlled by timer and displacement settings.

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3. Manual Grease Pump

A hand-operated pump designed for grease, typically lever or pedal driven. Generates high pressure needed to push grease through distribution lines and into bearings.

  • Best for: Small grease lubrication systems, infrequent cycles, low number of lubrication points.
  • Lubricant: Grease (up to NLGI 2).
  • Pressure: Up to 300 bar.

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4. Pneumatic / Air-Operated Grease Pump

Uses compressed air to drive a pneumatic piston, which in turn drives the grease pump. The air-to-grease pressure ratio (e.g., 50:1) allows very high grease pressures from low air pressure input.

  • Best for: Large centralized grease systems, heavy machinery, frequent automatic cycles.
  • Lubricant: Grease up to NLGI 2.
  • Pressure: Up to 500 bar.

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5. Flange Type Rotary Pump

A gear pump designed to be flange-mounted directly to a reservoir or machine housing. The rotating gears trap and push oil through the outlet port.

  • Best for: Oil circulation systems, gear lubrication, continuous flow applications.
  • Lubricant: Oil.
  • Mounting: Flange-mounted to reservoir or machine.

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6. Insert Type Rotary Pump

A compact gear pump designed to be inserted directly into a reservoir port. Saves space and simplifies installation compared to flange-mounted designs.

  • Best for: Compact machine tool lubrication units, small oil reservoirs.
  • Lubricant: Oil.

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7. Plunger Pump

A reciprocating pump where a plunger moves back and forth to draw in and discharge lubricant. Generates very high pressures and is suitable for viscous lubricants.

  • Best for: High-pressure lubrication, viscous oils, applications requiring precise metered delivery.
  • Pressure: Up to 400 bar.

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8. Multiline Radial Lubricator

A pump with multiple outlets, each delivering a fixed dose of grease simultaneously to multiple lubrication points with each pump stroke or motor cycle.

  • Best for: Machines with many grease points that need simultaneous lubrication — presses, construction equipment.
  • Lubricant: Grease.
  • Outlets: Typically 2–24 points.

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SP Engineers manufactures all of the above pump types and can help you select the right pump for your application. Contact our team for a recommendation.

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