Overview
The 5-gallon pneumatic grease pump from IsoHiTech Lubrication Systems is an air-operated dispensing unit for standard 5-gallon (35 lb) grease pails. Mounted on the pail, it pushes grease through a 13 ft hose to the lubrication point, removing manual pumping and open-container handling.
The pump runs on a 50:1 pressure ratio: 50 PSI of air input produces 2,500 PSI of grease output. With air input up to 150 PSI, it delivers up to 7,500 PSI, enough to push grease through tight or resistant fittings. Flow is approximately 16 oz/min (460 g/min).
For crews that grease daily, a pail-mounted pneumatic unit cuts refill frequency and keeps grease clean. Unsure whether the 5-gallon tier fits? Request a quote with your daily grease usage and we will help confirm it.
Key Features
- 50:1 pressure ratio with up to 7,500 PSI maximum grease output
- 16 oz/min (460 g/min) flow for fast greasing cycles
- Fits standard 5-gallon / 35 lb pails
- 13 ft hose covers most vehicles and machines
- Self-lubricating air motor
- Handles NLGI #0-#2 greases
Technical Specifications
| Item | Specification |
|---|---|
| Container | 5 gal (35 lb) standard pail |
| Pressure ratio | 50:1 (50 PSI air = 2,500 PSI grease) |
| Maximum grease output | 7,500 PSI |
| Air input | 60-150 PSI |
| Flow rate | 16 oz/min (460 g/min) |
| Grease compatibility | NLGI #0-#2 |
| Hose | 13 ft |
| Air inlet | 1/4″ NPT female |
| Pump weight | 35-37 lbs |
| Minimum compressor | 3 CFM |
How the 50:1 Ratio Works
The pump multiplies air pressure by its ratio: output equals air pressure x 50, so 100 PSI of shop air gives 5,000 PSI of grease pressure. With the declared 60-150 PSI air range, the practical ceiling is 7,500 PSI. Rate every downstream component (hose, gun, coupler, swivel) at or above your intended working pressure. See our grease pump pressure ratio selection guide for help choosing a ratio.
Construction and Materials
- Grease-wetted steel parts are hard chrome plated for wear resistance
- Brass fittings resist corrosion
- Nitrile seals suit common petroleum-based greases
- Pump chamber in zinc alloy with hard chrome plating
- Polyurethane hose, 1/4″ ID, rated above 10,000 PSI
- Follower plate matched to standard 5-gallon pail openings to limit contamination and aid priming
Applications
In automotive and truck service it covers chassis points (15-20 fittings per vehicle), wheel bearings, and tie-rod ends. On excavators with 200 or more grease points it replaces hours of manual greasing. In plants it services forklifts, conveyor bearings, and motor couplings on a fixed schedule.
Benefits and Honest Limitations
Benefits: consistent pressure on every fitting; faster greasing than a manual gun (4-6 oz/min by hand, versus 16 oz/min here); cleaner grease in a closed pail; steady output in cold weather.
Limitations to plan for:
- You need a shop air supply of at least 3 CFM; a small compressor may start the pump but struggle to keep up during continuous greasing.
- The unit takes up floor or bench space and is heavier than a hand-held gun.
- Fittings must still be cleaned before greasing; the pump cannot restore a worn or damaged zerk.
If your air supply or workspace is constrained, tell us your setup and get a tailored quote.
Choosing the Right Container Tier
The 5-gallon (35 lb) tier suits service bays, small fleets, and cell-level maintenance. If your crew empties pails often, step up to the 25 kg pail tier, or to the 120 lb (16-gallon) keg tier for high volume; 55-gallon drum systems serve bulk consumption. Consider our pneumatic grease pump for 25 kg pails or the 120 lb pneumatic grease pump for 16-gallon kegs as usage grows.
FAQ
What is a 5-gallon pneumatic grease pump?
An air-operated dispensing system for standard 5-gallon (35 lb) grease pails. It pressurizes grease with shop air and delivers it through a hose and gun, replacing manual pumping.
What pressure can this pump deliver?
With a 50:1 ratio and air input up to 150 PSI, it delivers up to 7,500 PSI; working pressure at the fitting depends on air supply and hose losses.
What is the flow rate?
About 16 oz/min (460 g/min); a manual grease gun typically delivers 4-6 oz/min.
What size container does it fit?
Standard 5-gallon / 35 lb grease pails; the follower plate matches standard pail openings.
Which grease grades can it pump?
NLGI #0 through #2 greases. If you use a specialty grease, confirm compatibility at order.
What air supply do I need?
A compressor delivering at least 3 CFM, supplying air at 60-150 PSI through the 1/4″ NPT female inlet.
Where is a 5-gallon pneumatic grease pump used?
Automotive workshops, fleet service, construction equipment maintenance, and industrial plants, anywhere compressed air is available and daily greasing volume is moderate.
How does a pneumatic grease pump work?
Compressed air drives a motor that pressurizes the grease and pushes it through the hose. See our guide to how a pneumatic grease pump works for details.
Can it handle continuous industrial duty?
It is built for regular workshop and fleet service; for very high consumption, the 25 kg or 120 lb tiers cut refill frequency.
How should the pump be maintained?
Keep the air supply filtered and dry, check hoses and fittings for leaks, keep the follower plate and pail rim clean, and wipe zerk fittings before connecting the coupler.
Related Resources
Learn more in our grease pump hub and the complete guide to grease pumps before you buy.
