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Accessories and Supplies
The Porter Cable 7800 Drywall Sander finishes walls and ceilings 3 to 4 times faster than conventional methods, paving the way to greater productivity and profits.
- Light weight – weighs only 8 pounds
- Operator can sand 10 foot ceiling without using stilts or a scaffold
- Motor is located on the opposite end of the vacuum tube handle from the sanding head for best balance and control
- Patented foam-backed abrasive sanding pads virtually eliminate swirl marks
- Articulating sand head enables operator to sand from top to bottom of a wall or ceiling without changing position
- Brush type skirt surround the sanding pad aiding in dust control and preventing pad from gouging wall joint
- Built in dust collection connector eliminates kinking or twisting of vacuum hose
- Variable speed dial adapts sanding pad speed to the application
Product Specifications (Specifications may change due to continuous product development)
Power: 120 VAC, 60Hz
Motor Amps: 3.5 Amp AC only
Speed RPM: Variable 1000-1650
Pad Size: 8 7/8”
Pad Type: Foam Backed
Pad Mount: Compression Type
The Porter-Cable Drywall Sander is designed for sanding walls and ceilings made of drywall or plaster. The Sander provides a superior finish, and is faster than conventional finishing methods for both new construction and renovation work. Clean-up time for Model 7800 is minimized by the use of an external vacuum cleaner attached to the sander.
ABRASIVE DISC SELECTION
The Drywall Sander is shipped with a 100 grit, abrasive disc installed. This abrasive is suitable for most applications. Abrasive discs of 120 grit and 150 grit are available for situations requiring a smoother finish.
CAUTION: Do not attempt to use any abrasives other than those recommended by Porter-Cable.
HOW TO HOLD A DRYWALL SANDER
The Drywall Sander should be held with both hands on the main tube (A) Fig. 1. The hands may be positioned anywhere along the main tube to provide the best combination of reach and leverage for the particular application.
CAUTION: Keep your hands on the main tube (A) Fig. 1. Keep away from the sanding head area. The sanding head swivels in multiple directions and could pinch your hand.
CONNECT MODEL 7800 DRYWALL SANDER TO VACUUM CLEANER
The following items are furnished with the Model 7800 Drywall Sander:
- One vacuum hose. The hose is 13 feet long with a standard 1-1/4" vacuum cleaner connector on one end and a special swivel connector on the Sander end. It has a static dissipating feature to dissipate static electrical charges that are sometimes experienced when recovering drywall dust.
- One 11/4" to 21/2" adapter (adapts the 11/4" hose connector to fit a 21/2" vacuum cleaner).
- Three straps to connect the Sander cord to the vacuum hose (to prevent tangling).
- Install the special drywall dust bag into your vacuum cleaner, following the instructions supplied with the vacuum cleaner. If this dust bag does not fit your vacuum cleaner correctly, purchase and install a suitable filter bag that is rated for drywall dust.
CAUTION: Failure to use a dust bag rated for drywall dust will increase the level of airborne dust particles in the work area. Continued and prolonged exposure to high concentrations of airborne dust may affect your respiratory system function.
- Connect the vacuum hose to the Drywall Sander. Open the Drywall Sander's hose connector by turning the large nut (A) Fig. 2 counterclockwise a few turns. Push the vacuum hose swivel connector (B) Fig. 2 into the Drywall Sander connector and seat firmly. Turn the large nut clockwise to tighten the connector.
- Install the three "hook & loop" type straps to prevent tangling of the Sander cord and the vacuum hose. Lay the cord and the vacuum hose out parallel to each other. Place a strap approximately two feet from each end and place the third strap halfway between the other two. Wrap the long end of each strap around the vacuum hose and close. Wrap the short end of each strap around the cord and close (Fig. 3).
- Connect the vacuum hose to your vacuum cleaner. Use the 1-1/4" to 2- 1/2" adapter if necessary. If your vacuum cleaner requires a special connector (something other than the standard 1-1/4" to 2-1/2" connectors supplied with the Drywall Sander), contact your vacuum cleaner supplier for the proper adapter.
TO START AND STOP DRYWALL SANDER
Be certain that the power circuit voltage is the same as that shown on the specification plate of the tool, and that the switch is OFF. Connect the tool to the power circuit. The Drywall Sander is equipped with a "rocker" type switch (A) Fig. 4. The top end of the switch button is labeled "OFF", and the bottom end of the button is labeled "ON". To start the Sander, press the bottom (ON) end of the switch. To stop the Sander: press the top (OFF) end of the switch.
The Model 7800 Drywall Sander is equipped with a variable speed control. The speed is adjusted by turning the control knob (B) Fig. 4. The control knob is numbered "1" through "5". The setting "1" is the slowest speed (approximately 1000 RPM) and "5" is the fastest speed (approximately 2,000 RPM). Use the higher speed settings for fast stock removal. Use the lower speed setting to reduce removal rate for more precise control. The Model 7801 Drywall Sander has a constant speed of 2,000 RPM.
On the Model 7800, a brushtype skirt (A) Fig. 5, surrounds the abrasive pad. This skirt serves two purposes: (1) It extends below the surface of the abrasive pad so that it contacts the work surface first, preventing the abrasive from "gouging" the work. (2) It helps contain the drywall dust until the vacuum cleaner pulls it away.
Replace the skirt if it is damaged or if it is worn excessively. Replacement skirts are available from your rental dealer.
Since the Model 7801 requires no vacuum cleaner, the skirt is shorter, but provides the same purpose as #1 in the preceding paragraph.
CAUTION: DISCONNECT TOOL FROM POWER SOURCE.
TO REPLACE SKIRT
- Remove abrasive pad (see ABRASIVE PAD REPLACEMENT).
- Use phillips screwdriver to remove the six retaining screws (B) Fig. 5.
- Lift the skirt out of housing.
- Position new skirt to housing and install the six retaining screws.
- Replace the abrasive pad.
The Drywall Sander has a unique articulating sanding head. the head can swivel in multiple directions, allowing the abrasive pad to conform to the work surface (Figs. 6, 7, and 8). This action enables the operator to sand the top, middle, and bottom of a wall or ceiling joint without changing position.
- Turn the vacuum cleaner switch "ON" (Model 7800 only.)
CAUTION: Wear a respirator approved by NIOSH for "Dust and Mist".
- Turn Drywall Sander switch "ON".
- Position the Drywall Sander lightly against the work surface. Apply just enough pressure to align the sanding head with the work surface.
- Apply additional pressure to engage the abrasive pad on the work surface. Move the Sander in an overlapping pattern to smooth the drywall compound down to a "featheredge". Apply ONLY enough pressure to keep the abrasive pad flat against the work. Excessive pressure can cause unacceptable swirl marks and unevenness in the work surface.
Keep the Sander in constant motion while the abrasive pad is in contact with the work surface. Use a steady, sweeping motion. Stopping the Sander on the work, or moving the Sander erratically can cause unacceptable swirl marks and unevenness in the work surface.
NOTE: Do not allow rotating abrasive pad to contact sharp protrusions. Contact with protruding objects (nails, screws, electrical boxes, etc.), can severely damage the abrasive pad.
ABRASIVE PAD REPLACEMENT
CAUTION: DISCONNECT TOOL FROM POWER SOURCE.
- Grasp the abrasive pad and the sander housing to prevent pad rotation.
- Rotate the pad retaining nut (A) Fig. 9 counterclockwise and remove.
- Lift off the large metal washer (B) Fig. 9, and the abrasive pad (C) Fig. 9.
- NOTE: When the abrasive pad (C) Fig. 9 is lifted off the Sander, the abrasive back-up disc (A) Fig. 10 is exposed. Please note that this back-up disc is also covered with an abrasive material, and is used ONLY to prevent "slippage" between the back-up disc and the foambacked abrasive pad. It is NOT suitable for use as a sanding abrasive. DO NOT USE THE SANDER WITHOUT A PROPER ABRASIVE PAD
Position the new abrasive pad to the back-up disc, and center the hole of the disc on the hub (B) Fig. 10 of the back-up disc.
- Position the large metal washer (B) Fig. 9, and the retaining nut (A) Fig. 9, to the Sander.
- Rotate the retaining nut clockwise to hand tighten (while holding the abrasive pad as described in step 1).
TRANSPORTATION AND STORAGE
Keep the Drywall Sander dry during transport and storage. Do not allow anything to press against the abrasive pad. The pad might deform, causing it to sand unevenly. If the pad cannot be protected during transport or storage: remove the abrasive pad and store it separately.
Click here for an article on safety rules for operating power tools: General Safety Rules For Operating Electric Power Tools
ADDITIONAL SAFETY RULES FOR DRYWALL SANDER
- USE A RESPIRATOR approved by NIOSH for “Dust and Mist”.
Ventilate work area and/or use a dust collector. Continued and prolonged
exposure to high concentrations of airborne dust may affect the respiratory
- MAINTAIN FIRM FOOTING AND BALANCE. Use appropriate
scaffolding. Do not overreach.
- SANDING OF LEAD-BASED PAINT IS NOT RECOMMENDED. Lead
based paint should only be removed by a professional.
- SOME WOOD CONTAINS PRESERVATIVES WHICH CAN BE TOXIC.
Take extra care to prevent inhalation and skin contact when working with
these materials. Request and follow any safety information available from your
WARNING: This tool was designed for certain applications. DO NOT modify and/or use it for any application other than for which it was designed. If you have questions relative to its application DO NOT use the tool until you have written Porter-Cable and we have advised you.
ADDITIONAL SAFETY RULES FOR PAINT REMOVAL
WARNING: Extreme care should be taken when removing paint. The peelings, residue, and vapors of paint may contain lead, which is poisonous. Exposure to even low levels of lead can cause irreversible brain and nervous system damage; young and unborn children are particularly vulnerable.
Before beginning any paint removal process you should determine whether the
paint you are removing contains lead. This can be done by your local health
department or by a professional who uses a paint analyzer to check for lead.
LEAD-BASED PAINT SHOULD ONLY BE REMOVED BY A PROFESSIONAL.
Persons removing paint should follow these guidelines:
- 1. KEEP THE WORK AREA WELL VENTILATED. Open the windows and put an exhaust fan in one of them. Be sure the fan is moving air from inside to outside.
- REMOVE OR COVER any carpets, rugs, furniture, clothing, cooking utensils and air ducts.
- PLACE DROP CLOTHS in the work area to catch any paint chips or peelings. Wear protective clothing such as extra work shirts, overalls and hats.
- WORK IN ONE ROOM AT A TIME. Furnishings should be removed or placed in the center of the room and covered. Work areas should be sealed off from the rest of the dwelling by sealing doorways with drop cloths.
- CHILDREN, PREGNANT OR POTENTIALLY PREGNANT women and nursing mothers should not be present in the work area until the work is done and all clean up is complete.
- WEAR A DUST RESPIRATOR or a dual (dust and fume) respirator mask which has been approved by the Occupational Safety and Health Administration (OSHA), the National Institute of Safety and Health (NIOSH), or the United States Bureau of Mines. These masks and replaceable filters are readily available at major hardware stores. Be sure the mask fits. Beards and facial hair may keep the masks from sealing properly. Change filters often.
DISPOSABLE PAPER MASKS ARE NOT ADEQUATE.
- KEEP FOOD AND DRINK out of the work area. Wash hands, arms and face and rinse mouth before eating or drinking. Do not smoke or chew gum or tobacco in the work area.
- CLEAN UP ALL REMOVED PAINT and dust by wet mopping the floors. Use a wet cloth to clean all walls, sills and any other surfaces where paint or dust is clinging. DO NOT SWEEP, dry dust or vacuum. Use a high phosphate detergent or trisodium (TSP) to wash and mop areas.
- AT THE END OF EACH WORK SESSION put the paint chips and debris in a double plastic bag, close it with tape or twist ties and dispose of properly.
- REMOVE PROTECTIVE CLOTHING and work shoes in the work area to avoid carrying dust into the rest of the dwelling. Wash work clothes separately. Wipe shoes off with a wet rag that is then washed with the work clothes. Wash hair and body thoroughly with soap and water.
Use this handy chart to determine the best extension cord for your equipment.
Recommended Minimum Wire Gauge for Extension Cords*
*Based on limiting the line voltage drop to five volts at 150% of the rated amperes.
Extension Cord Length
5.1 - 8
12.1 - 15
15.1 - 20
The smaller the gauge number of the wire, the greater the capacity of the cord. For example, a 14 gauge cord can carry a higher current than a 16 gauge cord. When using more than one extension cord to make up the total length, be sure each cord contains at least the minimum wire size required. If you are using one extension cord for more than one tool, add the nameplate amperes and use the sum to determine the required minimum wire size.Guidelines for Using Extension Cords
- If you are using an extension cord outdoors, be sure it is marked with the suffix "W-A" ("W" in Canada) to indicate that it is acceptable for outdoor use.
- Be sure your extension cord is properly wired and in good electrical condition. Always replace a damaged extension cord or have it repaired by a qualified person before using it.
- Protect your extension cords from sharp objects, excessive heat and damp or wet areas.