Y8 High pressure hand pump
The Y8 high-pressure hand pump (model Y8-6.3×0.6) is a compact, lever-operated manual lubricator for small centralized oil systems. Each handle stroke delivers 6 ml of lubricant at 1.5–2.0 MPa rated injection pressure—enough to charge positive injector (PDI) circuits or single-line resistance (SLR) metering layouts on CNC tools, packaging lines, and light industrial equipment.
Key specifications
- Rated pressure: 1.5–2.0 MPa (15–20 bar)
- Discharge: 6 ml per stroke
- Reservoir: 600 ml (≈0.6 L) with level sight
- Lubrication points: 1–50 (system-dependent)
- Viscosity range: 32–72 mm²/s (ISO VG 32–68 class oil)
- Filtration: 150 mesh (150 U) suction filter
- Outlets: Two M8×1 ports — left, right, or dual-outlet (P.N. 20541 / 20542 / 20543)
- Weight: 1.84 kg
This page covers Y8 selection, system compatibility, and ordering. For other manual pumps, see the manual grease barrel pump hub, LSG hand grease pump, and heavy-duty DA hand pump.
- Y8 Model Data & Features
- Product Video
| Model | P.N. | Rated pressure (MPa) | Discharge (ml/stroke) | Points | Reservoir (ml) | Viscosity (mm²/s) | Outlet |
|---|---|---|---|---|---|---|---|
| Y8-6.3×0.6 | 20541 | 1.5–2.0 | 6 | 1–50 | 600 | 32–72 | M8×1 / left |
| Y8-6.3×0.6 | 20542 | 1.5–2.0 | 6 | 1–50 | 600 | 32–72 | M8×1 / right |
| Y8-6.3×0.6 | 20543 | 1.5–2.0 | 6 | 1–50 | 600 | 32–72 | 2× M8×1 |
Main features
- High value manual pump for small PDI and SLR oil circuits
- Steel handle for repeated industrial use
- Dual outlet variants simplify left/right machine mounting
- Built-in filtration (150 U) protects downstream injectors
- Works with standard 4 mm / 6 mm lubrication pipe and common fittings
Watch the product video on the Parameter tab for handle operation and typical mounting orientation.
The Main Features
- The Y-8 hand lubrication pump is a very popular product in the market.
- The advantage is that it has a good price, high pressure, and works in the SLR and PDI systems.
- The pump has two outlets for easy installation in any position.
- The steel handle is strong enough for thousands of uses.
Related Product
What Is the Y8 High-Pressure Hand Pump?
The Y8 is a piston hand lubrication pump operated by a steel lever handle. It draws oil from an integrated reservoir, builds pressure on each stroke, and sends lubricant through one or two outlet ports to the main supply line of a centralized system. Unlike large drum lever pumps, Y8 is designed for machine-mounted service—typically 600 ml capacity, dual outlet orientation options, and pressure suited to injector-based or single-line metering networks.
IsoHiTech supplies Y8 for OEM rebuilds and field retrofits where electric pumps are not required or where operators need a backup manual charge source on the same circuit.
Where Y8 Fits in PDI and SLR Systems
Both architectures use one main supply line from the pump, but metering downstream differs:
PDI (positive displacement injector) systems — Each injector opens at set pressure and delivers a fixed dose per cycle. The pump must reach injector cracking pressure on every cycle. Y8 at up to 2 MPa is appropriate for small PDI manifolds on oil (VG 32–68). See positive injector systems for injector sizing.
SLR (single-line resistance / single-line lubrication) systems — Lubricant flows through restriction orifices or metering units to each point when line pressure rises. Y8 is commonly used on small SLR oil circuits (CNC guides, chains, light hosts) where manual cycling is acceptable. See single-line lubrication system for layout examples.
Typical flow path with Y8:
- Y8 hand pump — manual pressure source
- Main line — 4 mm or 6 mm nylon or copper tube (lubrication pipe)
- Metering — injectors, manifold distributors, or metering units
- Lubrication points — bearings, slides, chains
For grease (NLGI #0–#2) at higher pressure, use the LSG hand grease pump (up to 15 MPa) instead of Y8.
Y8 vs. Other IsoHiTech Hand Pumps
| Model | Medium | Max pressure | ml/stroke | Reservoir | Typical system | Best for |
|---|---|---|---|---|---|---|
| Y8-6.3×0.6 (this page) | Oil VG 32–68 | 1.5–2.0 MPa | 6 ml | 600 ml | PDI / SLR oil | Compact machine-mounted oil systems |
| LSG-1×0.4 / 1×1 | Grease NLGI 000–0 | 15 MPa | 1 ml | 0.4–1 L | PDI / PRG grease | High-pressure grease hand systems |
| DA / SG heavy-duty | Grease NLGI 000–2 | 7 MPa | 8 ml | 3.5 L | Single-line grease | Steel, mining, heavy industry |
| Barrel lever pumps | Grease in drum | Varies | High volume | 5–15 L | Workshop fill | Bulk transfer, not machine PDI/SLR |
Y8 is not interchangeable with LSG or DA pumps—oil vs. grease, pressure class, and outlet threading differ. Match the pump to lubricant type and downstream component ratings.
How to Select and Order Y8 (5 Steps)
Step 1 — Confirm lubricant. Y8 is for oil in the 32–72 mm²/s range. Do not use NLGI grease in this pump.
Step 2 — Confirm system type. Verify injectors or metering units are rated for ≤2 MPa working pressure and oil viscosity.
Step 3 — Choose outlet layout. Order by part number:
- 20541 — M8×1, outlet to the left
- 20542 — M8×1, outlet to the right
- 20543 — Dual M8×1 outlets
Step 4 — Size the circuit. IsoHiTech recommends up to ~50 points only when downstream metering and tube diameter support flow; for dense PDI manifolds, confirm with a point list and tubing length.
Step 5 — Plan tubing and fittings. Use 4 mm or 6 mm line from Y8 to the main header; see lubrication pipe selection and lubrication accessories for elbows and clips.
Installation & Operation Notes
- Mount the pump where the operator can complete full lever strokes without binding the handle.
- Fill through the reservoir cap; use clean oil within the specified viscosity band.
- Cycle the handle slowly until main-line pressure builds and injectors or metering units indicate delivery.
- Two outlet options allow mirror mounting on left- or right-hand machine panels—cap unused port only with an approved plug if your layout is single-outlet.
- Inspect the 150 U filter during refill; contaminated oil is the most common cause of stuck injectors downstream.
- If pressure feels weak, check for air in the reservoir, loose M8 fittings, or blocked main line—not just the pump.
Related Products & Guides
- Injectors & injection lubrication
- Manifold distributors
- Lubrication metering units
- Lubrication oil pump hub (electric and other manual oil pumps)
- Grease pump hub (for automatic grease systems)
- Automatic lubrication overview
Before you buy: read our complete guide to grease pumps.
Rated injection pressure is 1.5–2.0 MPa (15–20 bar) per the Y8-6.3×0.6 datasheet. Operating pressure at the outlet depends on system restriction, injector setting, and oil viscosity. Size downstream components for the maximum 2 MPa rating, not the minimum 1.5 MPa.
6 ml per full handle stroke for model Y8-6.3×0.6 (P.N. 20541, 20542, 20543). This is the pump displacement—not necessarily the dose at each remote point, which is set by injectors or metering units downstream.
The standard Y8 reservoir holds 600 ml (approximately 0.6 L). Refill with clean oil within the 32–72 mm²/s viscosity range. Monitor the level indicator during commissioning and refill before the reservoir runs dry to avoid air entering the main line.
Use oil in the 32–72 mm²/s range (roughly ISO VG 32 through VG 68, depending on temperature). Thicker oil increases handle effort and may slow injector response; oil outside spec can cause incomplete strokes or metering errors. Do not use grease in the Y8 pump.
Y8 has two M8×1 outlet options for flexible mounting: 20541 (outlet left), 20542 (outlet right), or 20543 (dual outlets). Choose the part number to match your machine panel orientation. Connect to 4 mm or 6 mm main line with appropriate fittings; plug unused ports only with approved plugs if your circuit is single-feed.
No. Y8 is an oil pump for PDI/SLR oil circuits at up to ~2 MPa. The LSG hand grease pump handles NLGI grease at up to 15 MPa, and the DA heavy-duty pump serves large single-line grease reservoirs. Match pump type to lubricant and system architecture.
The datasheet lists 1–50 lubrication points depending on system design. Actual point count is limited by injector or metering unit capacity, tube diameter, and whether all points receive adequate pressure each cycle. Send IsoHiTech your point list, tubing layout, and oil grade for confirmation before ordering.