Product Description
The CMT 541.525.00 Spacer is a precision-ground assembly spacer designed for use with cutter heads and CMT tooling systems. With an outer diameter of 21mm, a bore diameter of 12mm, and a plate thickness of just 0.5mm, this slim spacer gives woodworkers and machinists the fine positional control needed when stacking cutters, setting tool depth, or achieving a precise cutting width on a spindle or router table setup.
Key Features
- 21mm outer diameter - sized to fit standard CMT cutter head assemblies, ensuring a secure, centered fit without modification.
- 12mm bore diameter - matches common spindle and arbor shaft sizes used in cutter head and router table systems, so the spacer seats correctly without play.
- 0.5mm plate thickness - ultra-thin profile allows for very fine incremental adjustments to tool position on the spindle, giving users precise control over cutter stacking and tool spacing.
- Designed for assembly use - purpose-built as a spacer component, meaning it works as part of a larger tooling stack to dial in exact cutting widths or offsets rather than serving as a cutting tool itself.
Why This Product
- When stacking multiple cutters on a single arbor, even a fraction of a millimeter of misalignment can affect cut quality - this 0.5mm spacer provides exactly the fine-tuning increment needed to close the gap precisely.
- The 12mm bore and 21mm outer diameter are matched to fit CMT cutter head tooling (such as the 692/694 series systems), reducing guesswork about compatibility when building out a cutter head assembly.
- At just 0.5mm thick, this spacer adds virtually no bulk to an assembly while still delivering measurable positional adjustment - useful when working within tight spindle length constraints.
- Having a dedicated precision spacer on hand means faster setup changes and repeatable results when reconfiguring cutter stacks for different profiles or material widths.
Specifications
- Manufacturer Part Number: 541.525.00
- Brand: CMT Orange Tools
- Outer Diameter: 21mm
- Bore Diameter: 12mm
- Plate Thickness: 0.5mm
- Product Type: Spacer for Assembly
- Status: Active
Approved Applications
- Adjusting tool position on spindle arbors
- Stacking cutter heads to achieve a desired cutting width
- Fine-tuning tool offset in cutter head assemblies
- Use with CMT cutter head and tooling systems
Frequently Asked Questions
What are the exact dimensions of this spacer?
The CMT 541.525.00 spacer has an outer diameter of 21mm, a bore (inner) diameter of 12mm, and a plate thickness of 0.5mm.
What is this spacer used for?
This spacer is designed for assembly use - specifically for adjusting tool position on a spindle or stacking cutters in a cutter head system to achieve a precise cutting width or tool offset.
Will this spacer fit a 12mm arbor or spindle shaft?
Yes. The bore diameter is 12mm, so it is sized to fit directly onto a 12mm spindle or arbor shaft as part of a cutter head assembly stack.
Can I use multiple spacers together to get a larger offset?
Yes. Because each spacer adds 0.5mm of thickness, multiple spacers can be stacked together to build up the exact amount of positional offset needed within your cutter head assembly - provided your spindle length and tooling configuration allow for it.
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