GRABO’s technology and technical specifications
GRABO incorporates multiple patents and technological innovations developed by engineers at Nemo Power Tools over the course of several years. This page summarizes some of the product’s unique technical capabilities.
1. Adhesion to rough surfaces
2.Download Spec sheets:
3. Keeping a seal against porous materials.
A porous surface is any surface which allows gas to flow though it. Many construction materials are porous to varying degrees. Most common porous construction materials are: wood, concrete, rock, gypsum boards and many ceramics and tiles. Standard “suction cups” can not hold porous materials for more than a few seconds, even if the surface is flat enough to create a seal. A vacuum cavity on top of a porous material will quickly fail as air seeps in through the material.
GRABO overcomes this and allows secure adhesion to these materials by constantly pumping out a large volume of air at a rate greater than the diffusion rate of air though the surface. The physics behind the calculation of flow rates through different materials is both complex and interesting.
The flow rate required from GRABO to keep a strong vacuum seal against a porous surface, is generally described by a formula of generalized Murray’s law:
where the X is the ratio of mass variation during mass transfer in the parent pore, the exponent α is dependent on the type of the transfer. For laminar flow α = 3; for turbulent flow α = 7/3; for molecule or ionic diffusion α = 2; etc
The flow rate is than multiplied by the surface area under the seal for a given pressure differential, which results in the flow rate and power requirement from GRABO’s internal electric pump.
However, as interesting as the engineering is, users of GRABO do not need to worry about the science. All you need to know, is the GRABO is designed to work well on some of the most common porous materials in the industry.
* For specific max lifting force capabilities, refer to the table “Lifting force under different conditions” table at the bottom of this page.
GRABO components
Your GRABO includes the following main components:
- Connect the mains plug of the battery charger to an electrical outlet.
- Connect the charger to the battery.
- GRABO’s double foam seal is a patented soft sealing system, designed for sealing rough uneven surfaces as well as provide high friction and strong adhesion to many different materials. The seals are consumable rated to last 3,000 cycles under normal use, and can easily be replaced if they wear out. Check your seals regularly and replace them if any damage is visible.
- Remove the rubber foam seal that has become worn or damaged by pulling it out of the vaccum cup base. Use a flat screwdriver or knife to carefully pull the seal out from its plastic base. Pulling on the black foam directly will likely cause it to tear.
- Gently press the new rubber foam seal into position, ensuring that it fits snuggly and securely.
NEMO GRABO specification
Specification:
| Model/SKU | NEMO GRABO / NG-2B-FB |
|---|---|
| Battery | 14.8VDC 2600mAh Li-ion |
| Rated Power | 16W |
| Charger Input Voltage | 100-240VAC 50/60Hz |
| Battery Charging Time | ~2hrs |
| Non-Stop Running Time (Full Charge) | 1.5hrs |
| Running Cycles (On Full Charge) | 900 ON-OFF cycles of 10 seconds |
| Stand-by Mode (Charge Hold) | 30 days |
| Pump Service Life | 100000+ ON-OFF cycles / 800+ hrs continuous |
| Rated Air Flow | 0.7cfm (20 L/min) |
| Maximum Vacuum Rate | 11.6Psi (0.8 Bar, 80 kPa) |
| Maximum Lifting Capacity | 375Lbs (170 kg) |
| L x W x H | 12.1 x 7.37 x 4.91” (297 x 181 x 121 mm) |
| Net Weight (With Battery) | 3.3Lbs (1.6 kg) |
| Working Temperature | 32°F~140°F ( 0°~60 °C ) |
| Applicable Surface Type | Peak/valley heights less than 0.1” (3mm), arc less than 5° |
Lifting Capacity:
Max Lifting Force
This table provides a rough estimation of the max perpendicular adhesion force and max parallel adhesion force on different materials. These values may vary depending on material and surface conditions.
| Direction/Material |
Perpendicular Hold
|
Parallel Hold
|
|---|---|---|
| Glass | 375Lbs(170 kg) | 265Lbs(120kg) |
| Ceramic Tiles | 375Lbs (170 kg) | 265Lbs(120 kg) |
| Metal | 242Lbs (110 kg) | 242Lbs (110 kg) |
| Plastic | 220Lbs (100 kg) | 220Lbs (100 kg) |
| Wood | 220Lbs (100 kg) | 143Lbs (65 kg) |
| Rough Slate | 176Lbs (80 kg) | 176Lbs (80 kg) |
| Rough Concrete | 176Lbs (80 kg) | 176Lbs (80 kg) |
| Dry Wall | 165Lbs (75 kg) | 143Lbs (65 kg) |
GRABO PRO-Lifter 20 Specifications
Specification:
| Model/SKU | GRABO PRO-LIFTER 20 / GP-1Li-FB |
|---|---|
| Battery | 14.8VDC 2600mAh Li-ion |
| Rated Power | 16W |
| Charger Input Voltage | 100-240VAC 50/60Hz |
| Battery Charging Time | ~2hrs |
| Non-Stop Running Time (Full Charge) | 1.5hrs |
| Running Cycles (On Full Charge) | 900 ON-OFF cycles of 10 seconds |
| Stand-by Mode (Charge Hold) | 30 days |
| Pump Service Life | 100000+ ON-OFF cycles / 800+ hrs continuous |
| Rated Air Flow | 0.7cfm (20 L/min) |
| Maximum Vacuum Rate | 11.6Psi (0.8 Bar, 80 kPa) |
| Maximum Lifting Capacity | 375Lbs (170 kg) |
| L x W x H | 12.1 x 7.37 x 4.91” (297 x 181 x 121 mm) |
| Net Weight (With Battery) | 3.3Lbs (1.6 kg) |
| Working Temperature | 32°F~140°F ( 0°~60 °C ) |
| Applicable Surface Type | Peak/valley heights less than 0.1” (3mm), arc less than 5° |
| Additional Features | Pump stops automatically at maximum vacuum rate ( 11.6Psi / 0.8 Bar ) |
Lifting Capacity:
Max Lifting Force
This table provides a rough estimation of the max perpendicular adhesion force and max parallel adhesion force on different materials. These values may vary depending on material and surface conditions.
| Direction/Material |
Perpendicular Hold
|
Parallel Hold
|
|---|---|---|
| Glass | 375Lbs(170 kg) | 265Lbs(120kg) |
| Ceramic Tiles | 375Lbs (170 kg) | 265Lbs(120 kg) |
| Metal | 242Lbs (110 kg) | 242Lbs (110 kg) |
| Plastic | 220Lbs (100 kg) | 220Lbs (100 kg) |
| Wood | 220Lbs (100 kg) | 143Lbs (65 kg) |
| Rough Slate | 176Lbs (80 kg) | 176Lbs (80 kg) |
| Rough Concrete | 176Lbs (80 kg) | 176Lbs (80 kg) |
| Dry Wall | 165Lbs (75 kg) | 143Lbs (65 kg) |
GRABO H Specifications
Specification:
| Model/SKU | GRABO H / NGH-1B |
|---|---|
| Battery | 11.1VDC 2000mAh Li-ion |
| Rated Power | 16W |
| Charger Input Voltage | 100-240VAC 50/60Hz |
| Battery Charging Time | ~2hrs |
| Non-Stop Running Time (Full Charge) | 1hrs |
| Running Cycles (On Full Charge) | 340 ON-OFF cycles of 10 seconds |
| Stand-by Mode (Charge Hold) | 25 days |
| Pump Service Life | 100000+ ON-OFF cycles / 800+ hrs continuous |
| Rated Air Flow | 0.5cfm (15 L/min) |
| Maximum Vacuum Rate | 11.6Psi (0.8 Bar, 80 kPa) |
| Maximum Lifting Capacity | 330Lbs (150 kg) |
| L x W x H | 12.1 x 7.37 x 4.91” (297 x 181 x 121 mm) |
| Net Weight (With Battery) | 2.6Lbs (1.2 kg) |
| Working Temperature | 32°F~140°F ( 0°~60 °C ) |
| Applicable Surface Type | Peak/valley heights less than 0.1” (3mm), arc less than 5° |
Lifting Capacity:
Max Lifting Force
This table provides a rough estimation of the max perpendicular adhesion force and max parallel adhesion force on different materials. These values may vary depending on material and surface conditions.
| Direction/Material |
Perpendicular Hold
|
Parallel Hold
|
|---|---|---|
| Glass | 375Lbs(170 kg) | 265Lbs(120kg) |
| Ceramic Tiles | 375Lbs (170 kg) | 265Lbs(120 kg) |
| Metal | 242Lbs (110 kg) | 242Lbs (110 kg) |
| Plastic | 220Lbs (100 kg) | 220Lbs (100 kg) |
| Wood | 220Lbs (100 kg) | 143Lbs (65 kg) |
| Rough Slate | 176Lbs (80 kg) | 176Lbs (80 kg) |
| Rough Concrete | 176Lbs (80 kg) | 176Lbs (80 kg) |
| Dry Wall | 165Lbs (75 kg) | 143Lbs (65 kg) |
GRABO Version Comparison Chart
|
|
|
|
|---|---|---|---|
| Model | NEMO GRABO | GRABO PRO-LIFTER 20 | GRABO H |
| FUNCTIONAL PARAMETERS | |||
| Battery | 14.8VDC 2600mAh Li-ion | 14.8VDC 2600mAh Li-ion | 11.1VDC 2000mAh Li-ion |
| Rated Power | 16 W | ||
| Charger Input Voltage | 100-240VAC 50/60Hz | ||
| Battery Charging Time | ~2hrs | ||
| Non-Stop Running Time (Full Charge) | 90 Min | 90 Min | 60 Min |
| Running Cycles (ON-OFF Cycles of 10 Seconds On Full Charge) | 900 | 900 | 340 |
| Stand-by Mode (Charge Hold relates to battery, not to the pump) | 30 Days | 30 Days | 25 Days |
| Pump Service Life (Charge Hold) | 100000+ ON-OFF cycles / 800+ hrs continuous action | ||
| With Automatic OFF Switch | No | Yes | No |
| Rated Air Flow | 0.7cfm ( 20 L/min ) | 0.7cfm ( 20 L/min ) | 0.5cfm ( 15 L/min ) |
| Maximum Vacuum Rate | 11.6Psi ( 0.8 Bar, 80 kPa ) | ||
| PHYSICAL LIMITATIONS | |||
| Maximum Lifting Capacity | 375Lbs ( 170 kg ) | 375Lbs ( 170 kg ) | 330Lbs ( 150 kg ) |
| L x W x H | 12.1 x 7.37 x 4.91" ( 297 x 181 x 121 mm ) | 12.1 x 7.37 x 4.91" ( 297 x 181 x 121 mm ) | 12.1 x 7.37 x 4.91" ( 297 x 181 x 121 mm ) |
| Net Weight (With Battery) | 3.3Lbs ( 1.6 kg ) | 3.2Lbs ( 1.5 kg ) | 2.6Lbs ( 1.2 kg ) |
| Working Temperature | 32°F~140°F ( 0°~60 °C ) | ||
| KIT | |||
| Gauge Type | Mechanical With Protective Rubber Cover | Smart Digital Pressure Sensor | No Gauge |
| Number of Batteries | 2 | 1 | 1 |
| Charger | Multi Socket Charger | ||
| Number of Seals | 2 in Total | 2 in Total | 1 in Total |
| Warranty | 1 Year Basic Warranty as outlined on WWW.THEGRABO.COM | 1 Year Basic Warranty as outlined on WWW.THEGRABO.COM | 1 Year Limited Warranty as outlined on WWW.THEGRABO.COM |
| Miscellaneous | Use for all surface types, without automatic stop function, without display and electronic pressure gauge | Use for all surface types, with automatic stop function at 11.6Psi, with digital display and electronic pressure gauge | Use for all surface types, with smaller battery, without automatic stop function, without display and pressure gauge, without strap eyelets |
