Tools / Drills
Bosch 11255VSR Rotary Hammer Parts Information
Official parts breakdown and component identification guide for the Bosch 11255VSR rotary hammer, including detailed exploded views and a comprehensive list of replacement parts.
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The Bosch 11255VSR is a professional-grade rotary hammer designed for heavy-duty drilling and chiseling applications. This document serves as the official parts identification guide, providing exploded view diagrams and a complete list of individual components to assist in maintenance, repair, and part replacement.
Exploded View Diagrams
The manual features detailed technical illustrations showing the internal assembly of the tool. Figure 1 provides a comprehensive breakdown of the main housing, motor assembly, hammer mechanism, and gear housing. Figure 2 illustrates the assembly of the auxiliary handle and depth gauge system. These diagrams are essential for understanding the spatial relationship between internal parts such as the striker, piston, gears, and bearings.
Parts Identification
The document includes a structured table mapping position numbers from the diagrams to specific Bosch part numbers and descriptions. This list covers all critical internal and external components, including:
- Motor and Electrical: Field, armature (fan), carbon-brush set, power supply cord, and switch components.
- Hammer Mechanism: Hammer piston, striker, piston pin, and various O-rings and seals required for proper pneumatic operation.
- Housing and External: Gear housing, motor housing, handle covers, and auxiliary handle assembly.
- Fasteners and Seals: Various retaining rings, screws, washers, and needle bearings.
Maintenance and Support
Users should note that parts lists, pricing, and availability are subject to change. For the most current information, visit the official website at www.boschtools.com. For assistance with ordering specific replacement parts, users can contact AAA Rent-All at 225-291-1356. Always ensure the tool is disconnected from the power source before attempting any disassembly or inspection of internal components.
Official resources from the manual
Manufacturer information
Bosch
Practical help
Common problems
Worn carbon brushes
Replace the carbon-brush set (Part 811) if the tool loses power or sparks excessively.
Loss of hammering performance
Inspect internal seals (O-rings 26/56, 321/58, 321/60, 321/62) and the striker mechanism for wear.
Before use
- Verify the power cord (Part 5) is free of cuts or fraying.
- Ensure the auxiliary handle (Part 120) is securely tightened before operation.
- Check that the depth gauge (Part 651) is properly adjusted for the required hole depth.
- Confirm the tool holding fixture (Part 825) is clean and free of debris.
Specs in practice
- Carbon-Brush Set (811)
- Consumable electrical contacts that transfer current to the motor; require periodic replacement.
- O-Rings (Various)
- Critical seals that maintain the pneumatic pressure required for the hammer action.
- Depth-Gauge (651)
- Adjustable rod used to control the drilling depth of the rotary hammer.
Images and diagrams
- Figure 1 displays the internal mechanical assembly including the motor, piston, and gear housing.
- Figure 2 details the external auxiliary handle and depth gauge mounting configuration.
Model compatibility
- Parts are specific to the Bosch 11255VSR model.
- Always use genuine Bosch replacement parts to ensure safety and performance.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.