Piston Grease Gun, Groz G2R/B: 6,000 PSI High-Volume Double Piston

The Groz G2R/B Double Piston Grease Gun 6,000 PSI is a high-volume manual grease gun designed for regular and frequent lubrication applications. Its dual-piston mechanism delivers up to 3× more grease per stroke, helping reduce lubrication time and manual effort.

With a pressure capability of up to 6,000 PSI (413 Bar), a discharge rate of up to 2.4 gm/stroke, a 6-inch (150 mm) steel extension and 4-jaw coupler, this grease gun is well suited for agricultural machinery, construction equipment, vehicles and industrial maintenance.

Key Product Features

• Double piston mechanism for up to 3× grease output per stroke.
• Develops pressure up to 6,000 PSI / 413 Bar.
• Discharge rate up to 2.4 gm/stroke.
• Includes 6-inch (150 mm) steel extension.
• Supplied with a 4-jaw grease coupler.
• CNC-machined aluminum die-cast head for strength and reduced weight.
• Dual-inlet grease system helps maintain prime.
• Compatible with cartridge, bulk-fill and suction-fill loading methods.
• Designed for frequent and high-volume greasing applications.
• Suitable for agricultural and construction equipment.
• Backed by a 12-month warranty, according to the supplied product information.

Mechanical Data & Technical Specifications

Important Technical Note : The supplied product information mentions 2.4 gm/stroke. It should not be confused with 2.4 gm/s. For accurate engineering or procurement specifications, verify the exact manufacturer’s datasheet before publishing or using the specification for calculations.

The main advantage of the Groz G2R/B is its dual-piston mechanism.

A conventional manual grease gun generally delivers a particular quantity of grease with each pumping cycle. The G2R/B uses a double piston grease gun design to increase grease delivery. According to the supplied specifications, it provides up to 3× output per stroke, which can significantly reduce the number of pumping strokes required during routine lubrication.

This makes the tool particularly useful where many grease points must be serviced regularly.

Product Review

The Groz G2R/B Double Piston Grease Gun is designed for users who prioritize high grease output and faster manual lubrication.

Its strongest feature is the dual-piston mechanism, which is specified to provide up to three times the output per stroke. This can be especially valuable for agricultural and construction equipment where multiple lubrication points may need servicing.

The 6,000 PSI / 413 Bar pressure capability gives the grease gun a strong pressure rating for demanding lubrication applications. However, actual pressure required depends on the grease fitting, lubricant viscosity, component condition and equipment design.

The dual-inlet system is another practical feature because it is designed to help prevent loss of prime. The manufacturer information also indicates suitability for cold-weather operation.

The inclusion of a 150 mm steel extension and 4-jaw coupler makes the product ready for many standard greasing tasks without requiring additional accessories.

Overall Verdict: Groz G2R/B Double Piston Grease Gun is a strong choice for frequent manual lubrication where high grease output and reduced pumping effort are priorities.

Product Rating

Note: This is an editorial assessment based on the specifications provided by you and is not an independent laboratory test.

Positive & Negative Sentiments

Who Should Use This Grease Gun?

• Agricultural Equipment Owners: Suitable for tractors, farm machinery and other compatible grease-lubricated equipment.
• Construction Equipment Operators: Useful for regular lubrication of construction machinery.
• Professional Mechanics: High output can help mechanics complete repeated lubrication tasks faster.
• Industrial Maintenance Teams: Useful for machinery requiring regular manual grease lubrication.
• Workshop Users: A suitable option when frequent lubrication is part of routine workshop maintenance.

Where Can It Be Used?

The Groz G2R/B can be used for compatible grease-lubricated components in:

• Tractors
• Agricultural machinery
• Construction equipment
• Heavy machinery
• Industrial equipment
• Vehicles
• Workshop machinery
• Bearings
• Bushings
• Pins and pivots
• Linkages
• Other grease fittings

Always confirm that the component is designed for grease lubrication before applying grease.

Why Choose a Double Piston Grease Gun?

A double-piston design is particularly useful when grease volume and lubrication speed are important.

Main advantages:

• Higher grease output
• Fewer pumping strokes
• Reduced lubrication time
• Better suited to frequent maintenance
• Useful for equipment with multiple grease points
• Can reduce operator fatigue compared with lower-output manual guns

According to the supplied specification, the G2R/B provides 3× output per stroke, making it particularly suitable for high-volume manual greasing.

How to Use Groz G2R/B Double Piston Grease Gun

Step 1 – Select the Correct Grease

• Use the grease grade recommended by the machinery manufacturer.

Step 2 – Load the Grease

• The G2R/B supports cartridge, bulk-fill and suction-fill methods according to the supplied product information.

Step 3 – Remove Air

• If the gun loses prime or grease does not flow correctly, check for trapped air and use the appropriate priming/air-release procedure.

Step 4 – Clean the Grease Fitting

• Remove dirt and contaminants from the grease nipple before attaching the coupler.

Step 5 – Attach the 4-Jaw Coupler

• Connect the coupler securely to the grease fitting.

Step 6 – Operate the Lever

• Pump the handle smoothly until the required amount of grease is delivered.

Step 7 – Avoid Over-Greasing

• Stop when the manufacturer’s specified lubrication quantity has been reached.

Care & Precautions

• Always use the correct grease specified for the application.
• Clean grease fittings before lubrication.
• Keep the grease gun clean to avoid contamination.
• Do not mix incompatible greases.
• Inspect the extension and coupler regularly.
• Never use a damaged or leaking hose.
• Do not exceed the recommended pressure of the connected equipment.
• Avoid directing pressurized grease toward skin or eyes.
• Wear suitable safety glasses and gloves.
• Store the grease gun in a clean and dry environment.
• Keep bulk grease containers sealed.
• Follow the machinery manufacturer’s lubrication interval.
• Do not assume that higher grease pressure means better lubrication.

Tips for Optimal Use

1. Keep the Coupler Clean

• A contaminated coupler can introduce dirt into the lubrication system.

2. Prime Before Heavy Use

• Proper priming helps maintain consistent grease delivery.

3. Take Advantage of the 3× Output

• The double-piston mechanism is particularly valuable when servicing multiple grease points.

4. Use the 150 mm Extension Strategically

• The extension can improve access to recessed lubrication points.

5. Don’t Over-Grease Bearings

• Use the correct grease quantity and lubrication interval recommended by the equipment manufacturer.

6. Monitor Grease Resistance

• If the lever suddenly becomes unusually difficult to operate, investigate the grease fitting, passage or component rather than forcing the handle.

Groz G2R/B Double Piston Grease Gun vs Other Grease Guns

How to Select the Right Replacement Grease Gun

If you are replacing an old grease gun, compare these specifications before purchasing:

Groz G2R/B: Best Use Cases

FAQs:

1. Groz G2R/B a high-pressure grease gun? Yes. The supplied specifications state that the G2R/B can develop pressure up to 6,000 PSI (413 Bar).
2. What is the grease output of Groz G2R/B? The supplied product information specifies a discharge rate of up to 2.4 gm/stroke.
3. What does the double-piston mechanism do? The dual-piston mechanism is designed to increase grease delivery. According to the supplied specifications, it provides up to 3× output per stroke.
4. What extension comes with the Groz G2R/B? The package includes a 6-inch (150 mm) steel extension.
5. Does it include a grease coupler? Yes. The supplied package includes one 4-jaw coupler.
6. Can Groz G2R/B use grease cartridges? Yes. According to the supplied information, it can be used with cartridges as well as bulk-fill and suction-fill methods.
7. Is Groz G2R/B suitable for tractors? Yes. Its high-volume design makes it suitable for compatible grease-lubricated agricultural machinery, including tractors.
8. Is Groz G2R/B suitable for construction equipment? Yes. The product information specifically indicates applications involving agricultural and construction equipment.
9. Does it require an air compressor? No. It is a manual grease gun, so an air compressor is not required.