The 3L automatic oil lubrication pump is the standard mid-capacity model in the automatic oil pump family from IsoHiTech Lubrication Systems, built for CNC machines, milling machines, grinding machines, and injection molding equipment. It is the reference point of the family: large enough to serve a moderate point count at ordinary cycle settings, small enough to mount on a single machine without special brackets.
Key specifications
| Specification | Value |
|---|---|
| Reservoir capacity | 3 L |
| Flow rate | 90-300 ml/min |
| Max pressure | 25 bar (2.5 MPa) |
| Power | 80W |
| Weight | 3.6 kg |
| Voltage options | 24V DC, 110V AC, 220V AC, 230V AC |
| Oil viscosity range | 22-1300 cSt |
| Medium | oil |
| Dimensions | 350 x 280 x 420 mm |
| Control | manual, timer, or PLC |
| Operating temperature | -10°C to +60°C |
| Protection class | IP54 |
Where the 3L model sits in the family
The family covers three reservoir sizes that trade refill interval against mounting envelope. The 3L model is the balanced default; the 1 kg automatic oil lubrication pump is the compact single-machine choice, and the 4L lubrication pump is the long-interval choice for unattended or multi-shift running.
| Model | Reservoir | Max pressure | Max flow | Voltage options | Protection class | Temperature range |
|---|---|---|---|---|---|---|
| 1 kg compact | 1 kg (about 1 liter) | 18-70 bar | up to 1 L/min | 24V DC, 220V AC, 380V AC | IP65 | -25°C to +70°C |
| 3L standard (this page) | 3 L | 25 bar | 90-300 ml/min | 24V DC, 110V AC, 220V AC, 230V AC | IP54 | -10°C to +60°C |
| 4L long-interval | 4 L | 40 bar | up to 210 ml/min | 24V DC, 110V AC, 220V AC | IP65 | -25°C to +70°C |
Control modes
Three control modes are available: a manual button for an immediate cycle, a built-in timer that repeats short cycles on the schedule you set, and a PLC input that lets the machine control trigger lubrication. In every mode the pump delivers timed, intermittent cycles rather than a constant flow; it is not designed to run continuously.
Oil, viscosity, and the grease boundary
This pump handles oil in the 22-1300 cSt viscosity range and is an oil-only unit. Points that need grease belong on a different pump; the grease pump range covers that side. For an overview of how single-machine pumps fit into a wider layout, see what a central lubrication system is.
What this page does not claim
- Scope of supply is not listed here as fact. Tubing lengths, fittings, and cable are confirmed at quoting for your specific machine.
- The timer is an open-loop schedule. It does not sense whether the machine is running, and a running pump motor does not prove that oil arrived at every point.
- This is an oil-only pump. It is not offered in a grease version.
FAQ
What is a 3L automatic oil lubrication pump?
It is a mid-capacity automatic oiler with a 3 liter reservoir that delivers metered oil to machine lubrication points on timed cycles. It suits CNC, milling, grinding, and injection molding machines with a moderate number of points.
Where does the 3L model fit in the 1 kg / 3L / 4L family?
It is the standard middle option: the 1 kg model is the compact choice for tight spaces, and the 4L model stretches refill intervals for multi-shift or unattended running. The comparison table above lists the three side by side.
Does this pump handle oil or grease?
Oil only, in the 22-1300 cSt range. If your machine points call for grease, look at the grease pump range instead, or follow the machine builder’s recommendation.
What control modes are available?
Manual, timer, and PLC. The timer and PLC modes deliver short, intermittent cycles on a set schedule; the manual button triggers an immediate cycle. The timer is an open-loop schedule, so pair it with routine level and point checks.
What oil viscosity does it handle?
The published range is 22-1300 cSt, which covers the common slideway and spindle oils used on machine tools. Stay with the grade your machine builder specifies within that range.
How often does the reservoir need refilling?
There is no fixed schedule; the interval depends on your cycle settings, run time per cycle, and point count. The 3L reservoir exists to stretch that interval relative to the compact 1 kg model at the same settings.
What voltage options are available?
24V DC, 110V AC, 220V AC, and 230V AC. Confirm the supply available at your machine before ordering.
What is included in the scope of supply?
The pump unit itself is the product; tubing, fittings, and cable are matched to your machine layout and confirmed at quoting rather than bundled as a fixed kit.
What should I specify when ordering?
Provide your voltage, preferred control mode, oil grade within 22-1300 cSt, and approximate point count. Send these through the quote form and the configuration will be confirmed before anything ships.
Ready to size a pump for your machine? Contact us for a quote with your machine type and point count.
