Hand Lubrication Oil Pump — Manual Piston Pump for Centralized Oil
Hand lubrication oil pumps use a manual piston mechanism: pulling the handle down draws oil into the piston chamber; spring return on the upstroke discharges oil into the supply line. They are the simplest pressure source for single-line resistive (SLR) oil systems on presses, conveyors, and machines without electrical power at the lube point.
Combined with a resistive distributor and SBJ metering units, one hand pump can feed multiple bearings. IsoHiTech test reference: 15 m line length, 3 m lift, up to 15 lubrication points when sized correctly. Suitable for maintenance cycles of about 1–2 times per week (daily use on light-duty routes).
Oil viscosity ISO VG 32–250. Reservoir options 0.5 L, 1 L, 2 L (L5 family class). Related: lube oil pump hub · single-line systems · high-pressure hand pump (grease service).
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Hand Pump Model Table (20501–20509)
| P/N | Structure | Rated pressure (MPa) | Discharge/stroke (ml) | Points | Filter (μm) | Reservoir (L) | Viscosity (mm²/s) | Weight (kg) | Outlet |
|---|---|---|---|---|---|---|---|---|---|
| 20501 | Left | 0.4 | 5 | 1–50 | 40 | 0.5 | 21–210 | 1 | M8×1 |
| 20502 | Right | 0.4 | 5 | 1–50 | 40 | 0.5 | 21–210 | 1 | M8×1 |
| 20503 | Middle | 0.4 | 5 | 1–50 | 40 | 0.5 | 21–210 | 1 | M8×1 |
| 20504 | Left | 0.32 | 1–18 | 1–50 | 40 | 1 | 21–210 | 1.5 | M8×1 & M10×1 |
| 20505 | Right | 0.32 | 1–18 | 1–50 | 40 | 1 | 21–210 | 1.5 | M8×1 & M10×1 |
| 20506 | Middle | 0.32 | 1–18 | 1–50 | 40 | 1 | 21–210 | 1.5 | M8×1 & M10×1 |
| 20507 | Left | 0.32 | 1–18 | 1–50 | 40 | 2 | 21–210 | 2 | M8×1 & M10×1 |
| 20508 | Right | 0.32 | 1–18 | 1–50 | 40 | 2 | 21–210 | 2 | M8×1 & M10×1 |
| 20509 | Middle | 0.32 | 1–18 | 1–50 | 40 | 2 | 21–210 | 2 | M8×1 & M10×1 |
Choose left / right / middle outlet orientation for cabinet routing. 20501 series: higher pressure (0.4 MPa) and 5 ml/stroke; 20504+ series: 1 L / 2 L tanks with dual outlet threads.
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How Manual Piston Oil Pumps Work
Each handle stroke creates a pressure pulse in the main line. Metering units or restrictive distributors open at set pressure and deliver a shot to each bearing; when pressure falls, lines vent back and meters reset. The operator controls how often the system cycles—ideal for equipment that does not warrant an electric pump.
Building a Small Centralized Oil System
- Mount hand pump at accessible height; fill with clean ISO VG oil.
- Run main line (6 mm) to manifold or tee network.
- Install one SBJ meter per point with correct flow code.
- Connect 4 mm nylon legs to bearings; support with pipe clips.
- Cycle handle until oil appears at farthest point; log strokes per week per PM chart.
Hand Pump vs Electric Oil Pump
| Factor | Hand (205 series) | Electric HTS |
|---|---|---|
| Power | Operator effort | 110/220 V or DC |
| Best duty | 1–2× weekly PM | Continuous / timed |
| Pressure | 0.32–0.4 MPa | Up to ~1 MPa |
| Points | Up to ~15 (tested layout) | More with larger pump |
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Pair with manifold distributor, metering unit, and pipe couplings listed in Related Products—same SLR architecture as electric skids, lower capital cost.
Before you buy: read our complete guide to grease pumps.
Common tanks: 0.5 L (20501 class), 1 L (20504–20506), 2 L (20507–20509). L5-style 0.5/1/2 L variants may share the same family—confirm P/N on quote.
Factory test reference: 15 points with 15 m total line length and 3 m vertical lift. Heavier oil or longer runs may require fewer points or larger stroke model (20501 @ 5 ml/stroke).
ISO VG 32–250 (21–210 mm²/s per table). Stay within rated viscosity for smooth spring return; very thick oil in cold shops may need more strokes per point.
Yes—select orientation so the discharge port points toward your main line routing in a crowded cabinet (20502/05/08 = right, etc.).
Typical PM: 1–2 times per week per machine chart; high-duty lines may need daily short cycles. Replace hand lubrication with electric pump if operators skip cycles.
No—this is an oil hand pump. For grease, use high-pressure hand grease pump or hand grease pump.