GSS20-40 is a quarter-sheet orbital finishing sander with clamped-sheet and documented pressure-sensitive-adhesive options. Unresolved instructions require model-specific clarification.
Clamped and adhesive sheets
The manual gives 4½ × 5½ inches for ordinary clamped paper and 4½ × 4½ inches for PSA paper. Use the correct attachment method.
Fixed orbital frequency
The product lists 12,000 OPM, without a variable-speed control. This is not an RPM specification.
Unresolved pad dimensions
The product page gives 4 × 4½ inches; the manual gives 4½ × 4⅛ inches. Do not reconcile the discrepancy by guessing.
Dust adapter boundary
The US page specifies VAC024 for 1¼- and 1½-inch hoses and explicitly excludes VAC002.
Startup conflict
Printed page 10 says to hold the tool off the work when switching; page 11 says to place the pad first. No startup sequence is prescribed here.
Microfilter care
The manual specifies dry cleaning and says not to wash the microfilter with soap and water.
Check before you follow
Identity & documentation.
- Brand
- Bosch
- Model
- GSS20-40
- Tool type
- Quarter-sheet orbital finishing sander
- Market
- United States
- US product listing
- GSS20-40
- Product-page service identifier
- 3601BA2110 (match your tool)
- Manual revision used
- 08/18
- Evidence level
- Manufacturer documentation; no physical testing
A source check date records this research pass. It does not confirm that a manual is the newest possible revision, a tool is still in production, or a particular unit matches these documents.
Manual 2610051953, revision 08/18, matches GSS20-40. Pad dimensions and startup wording conflict with other recorded passages.
Manuals & service references
Identify the right document.
These are document reference records, not downloadable manuals. Original manufacturer files are not provided here. Match the exact model and revision before use. A parts reference does not authorize internal repair.
Operator manualPDF
GSS20-40 operating instructions
Model identified in this document
Official PDF cover and applicable operating pages inspected.
Document revision: 08/18
GSS20-40 operating instructions
Original document languages: en, fr, es
Document checked
Keep the limits in view.
- Ask Bosch to resolve the startup conflict before relying on either passage.
- PSA removal has a warming exception in the manual; this guide does not turn it into an improvised powered procedure.
Read the instructions for the tool and any applicable battery or charger together. Routine owner care stays outside the housing; internal service belongs with the manufacturer or an authorized service provider.
Keep reading
Bosch: explore this brand’s tool references
Guides for this model
Explore controls, comparisons and documentation for this exact model.
- No-load OPM is not a sanding-speed or stock-removal ranking
No-load OPM describes a motion-frequency range, not how long a board takes to finish. Separate removal, elapsed time and the final surface to see what a comparison actually demonstrates.
- Bosch round or quarter-sheet
Do you mainly refine open surfaces or work along straight cabinet boundaries? Compare workspace and abrasive systems before complete extraction and consumable costs.
- Choose the right sander type
Choose a sander for tabletops, cabinet corners or thin veneer, with practical differences in reach, abrasives and dust collection.
- Read sander speed correctly
12,000 OPM and 1,640 ft/min cannot share a meaningful bigger-is-faster ranking. Identify the motion before using the number to choose a tool.
- Check abrasive fit
Diameter alone is not enough. Format, attachment, specified abrasive size, extraction openings and exact tool identity belong on the same shopping list.
- Controlled edges and corners
A bare-solid-wood shelf example separates supported machine work from block finishing and distinguishes a preserved square edge from deliberate easing.
- GSS20-40 paper and holes
Separate regular and PSA sizes, clamp rear then front while unplugged, and use the supplied punch plate.
- GSS20-40 PSA removal
Do not store this sander with adhesive-backed paper attached. Timely removal after normal work reduces hard bonding; paper already stuck fast needs a different decision, not more pulling force.
- Resolve the startup conflict
One passage says to start clear of the work; another says to start with the pad touching it. Identify the booklet and obtain an applicable clarification rather than choosing the familiar method.
- Rebates and narrow spaces
Establish opening, floor and shoulder references, rehearse the complete isolated tool path, and preserve fit with separate hand-block faces.
The reading behind this guide
Source records describe the evidence used for this guide. Original manufacturer files and external videos are not provided here.
Sources & references.
Manufacturer documents and public safety references are the starting point. Check each source’s scope and confirm the exact model, market, and revision for your tool.
- Bosch: GSS20-40 US product listing GSS20-40; product URL 06012A2110; displayed service part 3601BA2110
Checked
Official indexed text checked; direct download unverified
US listing; stock, price and latest-generation status are not established.
- Bosch: GSS20-40 operating instructions 2610051953
Revision 08/18 · Checked · Pages 4, 7–12
Document checked
Page 10 and page 11 conflict on startup position. Pad dimensions also differ from the product page. Confirm these points with Bosch before relying on them.