What a Single-Point Lubricator Does
A single-point lubricator delivers grease to one bearing or one lubrication point on a set schedule. The unit is self-contained and battery-driven, with a replaceable battery that powers the discharge cycle. A clear plastic housing with a metal base holds the grease charge, and the standard grease-fitting outlet thread connects directly to the lubrication point. This design suits “one bearing, one lubricator” jobs where a centralized system is not justified. A handful of isolated bearings can be covered with individual units, each set to its own discharge period. The approach is wrong when many points exist in one area or when supply lines already reach the bearings. For those cases, a centralized system remains the better answer.
An automatic single point lubricator mounts directly on the bearing housing and dispenses on its own schedule — the standalone answer for points a grease route cannot reach. Compare formats in the single point lubricator guide.
The lubricator meters grease slowly over the selected discharge period. Discharge pressure reaches up to 5 bar, which is enough for a free, unblocked lubrication point. The unit does not clear hardened grease or blocked passages. Operating range spans -20 to +60 °C, and discharge runs slower as temperature drops toward the lower end. The unit is filled with standard greases at the factory, and the body measures about 9 x 7 cm for the 150 cc size. Weight is about 350 g full for the 150 cc size.
Declared Specifications
| Parameter | Declared Value |
|---|---|
| Sizes | 60 cc, 150 cc, 250 cc |
| Discharge pressure | Up to 5 bar |
| Operating range | -20 to +60 °C |
| Drive mechanism | Battery-driven |
| Battery | Replaceable battery |
| Housing | Clear plastic housing with metal base |
| Discharge periods | 1, 3, 6, or 12 months |
| Filling | Standard greases, factory-filled |
| Outlet thread | Standard grease-fitting outlet thread |
| Weight | About 350 g full (150 cc size) |
| Body dimensions | About 9 x 7 cm |
| Orientation | Confirm when ordering |
Choosing a Discharge Period
The discharge period sets how long the lubricator takes to empty its grease charge. Available settings are 1, 3, 6, or 12 months. The correct period matches the relubrication interval for the bearing. A bearing that needs grease every month should get a 1-month setting, not a 12-month setting. A 12-month period is not automatically better; it only works when the bearing’s grease demand is low enough. Choosing a longer period than needed starves the bearing. Choosing a shorter period than needed over-greases the point and wastes grease. The bearing’s operating conditions, load, speed, and environment determine the relubrication interval. Use the interval from the bearing documentation or maintenance records. If no interval is known, start with a shorter period and observe the bearing condition. Adjust the setting on the next unit based on what you see.
The discharge period also affects how much grease leaves the unit per day. The 60 cc, 150 cc, and 250 cc sizes cover different demand levels. Match the daily output to the bearing’s daily grease need, and select the size and period together, not independently.
When Not to Use One
A single-point lubricator is not the right tool for every lubrication point. Blocked lubrication points cannot be cleared by this unit. The discharge pressure reaches up to 5 bar, which is not enough to push through hardened grease, debris, or a seized fitting. If the point does not accept grease from a manual gun, the single-point lubricator will not fix it. Points needing high flow or high back-pressure are also outside this unit’s range. The slow metering action cannot deliver a large volume quickly, and a high back-pressure point may stop discharge entirely. Oil-lubricated bearings should not receive grease from this unit. The lubricator meters grease, not oil, and substituting grease into an oil-lubricated bearing can cause overheating or failure.
Points that already have a supply line do not need a single-point lubricator. Adding one creates a second grease source that can conflict with the existing line. Centralized systems already meter and deliver grease to connected points. A single-point unit is redundant there. The right application is an isolated bearing with no supply line and no nearby grease source. Also check that the unit starts discharging after installation. A unit that is not discharging will leave the bearing dry. Observe the clear plastic housing to confirm the grease level drops over the first days. At low temperatures near -20 °C, discharge runs slower, so account for that in the relubrication plan.
Installation and Orientation
Install the lubricator directly on the grease fitting of the bearing. The standard grease-fitting outlet thread screws onto the point. Hand-tighten the unit, then check that the connection is secure. Do not use a wrench to force the unit onto the fitting. The metal base provides the threaded connection, and the clear plastic housing holds the grease charge. After installation, confirm the unit starts discharging. Watch the grease level in the clear housing over the first few days. A dropping level means discharge is active. A static level means the unit is not discharging, and the installation must be checked.
Orientation matters for reliable discharge. Follow the orientation shown in the unit’s installation drawing. The drawing specifies the acceptable mounting positions for the unit. Some positions may trap air or prevent the grease from reaching the outlet. Confirm the orientation when ordering if the installation drawing is not available. The unit’s weight of about 350 g full for the 150 cc size is low enough for most fittings. The body dimensions of about 9 x 7 cm fit in tight spaces around a bearing housing. Keep the unit clear of moving parts and hot surfaces. The operating range tops out at +60 °C, so do not mount the unit near a heat source above that limit.
Sizes, Filling and Battery
Three sizes cover different grease demand levels: 60 cc, 150 cc, and 250 cc. The 60 cc size suits small bearings with low grease consumption. The 150 cc size is the middle option and weighs about 350 g full. The 250 cc size suits larger bearings or longer service intervals. Choose the size by the bearing’s grease demand over the selected discharge period. The size and period work together to match the bearing’s need.
The unit is filled with standard greases at the factory. The grease type is selected for general bearing applications. The clear plastic housing lets you see the remaining grease level at any time. The battery is replaceable, and the drive mechanism is battery-driven. When the battery is depleted, replace it and install a fresh unit or refill the existing one according to the unit’s design. The metal base provides a stable threaded connection. The clear housing threads onto the base and holds the grease charge. Check the housing for cracks before installation. A cracked housing can let contaminants into the grease or let grease leak out.
For related equipment, see the single-point lubricator category for other sizes and configurations. The automatic lubrication overview explains how automatic units fit into a maintenance plan. For points that need manual grease application, the electric grease dispenser and the pneumatic grease dispenser offer alternatives. When many points exist in one area, the single-line lubrication system may be the better answer. The central lubrication system guide explains when centralized delivery beats individual units. Contact IsoHiTech for a quotation if you need help choosing.
Frequently Asked Questions
How do I choose the discharge period?
Match the discharge period to the bearing’s relubrication interval. A 12-month setting is not better when the bearing needs grease sooner.
Can one lubricator serve multiple bearings?
No, one lubricator serves one bearing. Use one unit per grease fitting for reliable delivery.
What should I know about the battery?
The battery is replaceable and the drive is battery-driven. Replace the battery when the unit stops discharging.
Does the unit work lying sideways?
Follow the orientation shown in the unit’s installation drawing. Confirm acceptable positions when ordering.
What grease is inside the unit?
The units are filled with standard greases at the factory. Check the unit documentation for the specific grease type.
How does the unit behave in winter?
Discharge runs slower as temperature drops toward -20 °C. Account for slower discharge in the relubrication plan.
When is a centralized system the better answer?
A centralized system is better when many points sit in one area. It is also better when supply lines already reach the bearings.
What is the discharge pressure limit?
Discharge pressure reaches up to 5 bar, which cannot clear blocked points. Clear blocked fittings before installing the unit.
How do I choose a size?
Choose the size by the bearing’s grease demand over the discharge period. The 60 cc size suits low demand, and larger sizes suit more.
Who makes this lubricator and how do I get one?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
You can also reach the team through the contact for a quote page.
