An isolated studio view of the blue and black Bosch GSS18V-40 18V brushless sheet orbital finishing sander showing its rectangular 1/4 sheet sanding plate, textured palm grip housing, and red variable speed thumbwheel against a plain white background.
An infographic product diagram of the Bosch GSS18V-40 sheet sander with pointer lines highlighting key structural features including the ergonomic palm grip design, soft start technology, an easy-to-reach on/off switch, variable speed selector, powerful 18V brushless motor, compact shape, and mobile dust collection adapter.
A direct horizontal profile view of the Bosch GSS18V-40 18V cordless orbital sheet sander showcasing its compact clearance height, silver motor housing, black backing pad, and elongated rear battery mounting arm.
An angled perspective studio view of the Bosch GSS18V-40 cordless finishing sander equipped with a pointed triangular detail sanding plate attachment and an attached black red Bosch CORE18V 4.0 Ah lithium-ion battery package.
An isolated studio view of the Bosch 18V brushless sander configuration featuring a larger square 1/3 sheet interchangeable sanding plate adapter equipped with side wire paper-clamping brackets and an attached CORE18V battery.
A direct rear view of the Bosch 18V orbital sander highlighting the dual-mode dust extraction interface showing the open port for mobile dust collection bags or direct wet dry vacuum hose integration.
An angled upper perspective view of the blue Bosch GSS18V-40 cordless palm sander detailing the smooth contours of its rubberized hand grip and the prominent red toggle power button.
A macro close-up focus on the forward palm rest section of the Bosch finishing sander emphasizing the textured anti-slip surface pattern, the red mechanical power button, and the red variable speed dial set to level 6.
An inverted view focusing on the undercarriage of the Bosch 18V finishing sander displaying a black hook-and-loop rectangular sanding plate with built-in dust extraction vacuum holes alongside a mounted red and black battery pack.
An active close-up view of a woodworker's hand adjusting the red variable speed dial wheel to setting 6 on the side of the Bosch finishing sander next to a prominent black AMPShare battery system compatibility logo label.
An overhead action view of a woodworker pressing down on the textured palm rest of the Bosch GSS18V-40 orbital sander, using the triangular detail sanding plate configuration to smooth an internal corner of a hardwood staircase step.
A close-up view of a technician using a hand screwdriver to change out the interchangeable base on the Bosch cordless sander, fastening a pointed detail sanding plate into position on a workbench next to a yellow sheet of multi-hole abrasive sandpaper.
A product component shot showing a small pile of collected fine wood dust on a work table next to the detached fabric dust extraction collection bag and universal vacuum hose adapter accessory from the Bosch sander kit.
An overhead perspective view of a trade professional guiding the compact cordless Bosch palm sander along the grain of a vertical wooden staircase panel, utilizing the detail sheet configuration to strip old varnish.
An active jobsite view showing a craftsman using the Bosch 18V brushless finishing sander to carefully remove peeling white paint and prep the detailed wooden trim molding around a vintage glass window frame.
An isolated studio view of the blue and black Bosch GSS18V-40 18V brushless sheet orbital finishing sander showing its rectangular 1/4 sheet sanding plate, textured palm grip housing, and red variable speed thumbwheel against a plain white background.
An infographic product diagram of the Bosch GSS18V-40 sheet sander with pointer lines highlighting key structural features including the ergonomic palm grip design, soft start technology, an easy-to-reach on/off switch, variable speed selector, powerful 18V brushless motor, compact shape, and mobile dust collection adapter.
A direct horizontal profile view of the Bosch GSS18V-40 18V cordless orbital sheet sander showcasing its compact clearance height, silver motor housing, black backing pad, and elongated rear battery mounting arm.
An angled perspective studio view of the Bosch GSS18V-40 cordless finishing sander equipped with a pointed triangular detail sanding plate attachment and an attached black red Bosch CORE18V 4.0 Ah lithium-ion battery package.
An isolated studio view of the Bosch 18V brushless sander configuration featuring a larger square 1/3 sheet interchangeable sanding plate adapter equipped with side wire paper-clamping brackets and an attached CORE18V battery.
A direct rear view of the Bosch 18V orbital sander highlighting the dual-mode dust extraction interface showing the open port for mobile dust collection bags or direct wet dry vacuum hose integration.
An angled upper perspective view of the blue Bosch GSS18V-40 cordless palm sander detailing the smooth contours of its rubberized hand grip and the prominent red toggle power button.
A macro close-up focus on the forward palm rest section of the Bosch finishing sander emphasizing the textured anti-slip surface pattern, the red mechanical power button, and the red variable speed dial set to level 6.
An inverted view focusing on the undercarriage of the Bosch 18V finishing sander displaying a black hook-and-loop rectangular sanding plate with built-in dust extraction vacuum holes alongside a mounted red and black battery pack.
An active close-up view of a woodworker's hand adjusting the red variable speed dial wheel to setting 6 on the side of the Bosch finishing sander next to a prominent black AMPShare battery system compatibility logo label.
An overhead action view of a woodworker pressing down on the textured palm rest of the Bosch GSS18V-40 orbital sander, using the triangular detail sanding plate configuration to smooth an internal corner of a hardwood staircase step.
A close-up view of a technician using a hand screwdriver to change out the interchangeable base on the Bosch cordless sander, fastening a pointed detail sanding plate into position on a workbench next to a yellow sheet of multi-hole abrasive sandpaper.
A product component shot showing a small pile of collected fine wood dust on a work table next to the detached fabric dust extraction collection bag and universal vacuum hose adapter accessory from the Bosch sander kit.
An overhead perspective view of a trade professional guiding the compact cordless Bosch palm sander along the grain of a vertical wooden staircase panel, utilizing the detail sheet configuration to strip old varnish.
An active jobsite view showing a craftsman using the Bosch 18V brushless finishing sander to carefully remove peeling white paint and prep the detailed wooden trim molding around a vintage glass window frame.
BOSCH

Bosch Orbital Finishing Sander GSS18V-40N 18V Brushless Bare Tool (6,000-10,000 OPM 1/4 Sheet Interchangeable Palm Detail Woodworking Power Tool)

In stock
SKU: GSS18V-40N
$189.00 USD

Description

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Bosch GSS18V-40N 18V Brushless 1/4 Sheet Orbital Finishing Sander Bare Tool

The Bosch GSS18V-40N 18V Brushless Sheet Orbital Finishing Sander operates as a variable-speed palm sander engineered to smooth raw wood, remove surface finishes, and detail tight cabinet corners. Powered by an 18V brushless motor, this 2-2/5 lb. bare tool operates between 6,000 and 10,000 oscillations per minute with electronic constant speed control and soft-start technology. Outfitted with an interchangeable plate system accepting 1/4-sheet, 1/3-sheet, and triangular detail hook-and-loop backing pads, an integrated dust extraction port with a collection bag, and an ergonomic palm-grip housing measuring 8-9/10 in. L x 5-1/5 in. W x 4-3/10 in. H, this tool enables finish carpenters and cabinet refacing specialists to execute swirl-free surface preparation on hardwood and softwood substrates.

**Battery and charger sold separately.

Best Used For:

  • Cabinet Refacing & Built-In Detailing: Sanding cabinet doors, face frames, and internal corners using interchangeable 1/4-sheet and triangular detail pads.
  • Hardwood Furniture Finish Preparation: Smoothing raw oak, maple, and walnut surfaces between stain applications without leaving orbital swirl marks.
  • Vertical Trim & Overhead Millwork Sanding: Controlling tool position during overhead crown molding and vertical door casing sanding with a low-profile palm grip.

Key Performance & Safety Features

  • Commercial 18V Brushless Motor: Delivers corded-like material removal rates and extended battery runtime for continuous surface preparation.
  • 3-in-1 Interchangeable Sanding Plate System: Swaps between 1/4-sheet, 1/3-sheet, and pointed detail backing pads to handle flat panels and narrow corners.
  • Variable Speed Control Dial: Adjusts orbital frequency between 6,000 OPM and 10,000 OPM to match abrasive grits and wood hardness.
  • Electronic Constant Speed Technology: Maintains consistent orbital speed and power under downward pressure to ensure uniform material removal.
  • Soft-Start Component Protection: Suppresses initial startup torque to prevent sudden gouging when placing the abrasive pad on workpieces.
  • Dual-Mode Dust Extraction Interface: Connects to the included fabric dust bag or attaches directly to vacuum hoses for instant airborne particle capture.

What's Included

  • (1) Bosch GSS18V-40 18V Brushless Sheet Orbital Finishing Sander
  • (2) Interchangeable Sanding Plates
  • (3) Assorted Sandpaper Sheets
  • (1) High-Efficiency Dust Collection Bag
  • (1) Heavy-Duty Sandpaper Hole Punch Board

Technical Specifications

Brand Manufacturer Bosch®
Model Part Number OEM SKU GSS18V-40N
Tool Power Classification Type 18V Cordless Sheet Orbital Finishing Sander (Bare Tool)
Operating Battery Voltage 18 Volts DC (AMPShare™ System Compatible)
Motor Architecture Type Commercial-Grade Brushless Motor
No-Load Orbital Speed Range 6,000 to 10,000 OPM (Oscillations Per Minute)
Speed Control Mechanism Variable Speed Thumb Dial Control
Paper Size Configurations Accepted 1/4 Sheet, 1/3 Sheet, and Triangular Detail Sheet
Abrasive Backing Attachment Style Hook-and-Loop Grip Base
Dust Management Capability Integrated Dust Bag Port & Universal Vacuum Hose Link
Housing Construction Materials Heavy-Duty Plastic Composite with Aluminum Gearbox
Overall Tool Dimensions (L x W x H) 8-9/10 in. L x 5-1/5 in. W x 4-3/10 in. H
Assembled Net Tool Weight 2.4 lbs. (2-2/5 lbs.)

Pro-Tip: When cutting standard sandpaper rolls for the Bosch GSS18V-40N, always use the included sandpaper hole punch board to press vacuum extraction holes into non-perforated sheets. Aligning the punched holes with the backing plate vacuum ports maintains proper dust extraction, preventing heat buildup and keeping abrasive sheets from clogging.