When leveling a table saw, choosing the right shims is crucial for achieving accurate and stable alignment. The ideal shims for this purpose are typically made of durable metals like brass, stainless steel, or aluminum. These materials offer precision, stability, and resistance to corrosion. Shim thickness can range from as thin as 0.001\” for fine adjustments to 0.01\” or more for larger corrections. The choice depends on the specific leveling needs of your table saw.
What Are the Best Materials for Table Saw Shims?
The choice of shim material is critical for effective table saw leveling. Here are the top options:
- Brass Shims:
- Highly durable and resistant to deformation
- Excellent for precision adjustments
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Maintains shape under pressure
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Stainless Steel Shims:
- Corrosion-resistant
- Suitable for long-term use
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Provides stability in various conditions
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Aluminum Shims:
- Lightweight yet sturdy
- Easy to cut and shape
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Good for general leveling tasks
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Sheet Metal and Foil:
- Useful for very fine adjustments
- Can be sourced from everyday items like soda cans
- Typically very thin (around 0.001\”)
How Thick Should Table Saw Shims Be?
The thickness of shims needed for leveling a table saw can vary significantly:
Adjustment Type | Shim Thickness Range | Common Uses |
---|---|---|
Fine Adjustments | 0.001\” – 0.002\” | Precision leveling, minor corrections |
Medium Adjustments | 0.002\” – 0.005\” | General alignment, small gaps |
Large Adjustments | 0.005\” – 0.01\”+ | Major leveling, significant misalignments |
It’s often necessary to use a combination of different thicknesses to achieve the perfect level. Having a range of shim thicknesses on hand allows for more precise adjustments.
What Techniques Should I Use for Shimming a Table Saw?
Follow these steps for effective table saw shimming:
- Assess the Table Top:
- Use a straight edge and feeler gauges
- Identify areas needing adjustment
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Note that perfect flatness (e.g., 0.002\”) may not be necessary; variations within 0.004\” to 0.007\” are often acceptable
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Select Appropriate Shims:
- Choose shims matching required thickness and material
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Consider brass for precision adjustments due to stability
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Place Shims Strategically:
- Insert shims at points needing adjustment
- Focus on interfaces between cast iron wings and main table
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Use combinations of shims for optimal alignment
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Check and Adjust:
- Recheck with straight edge and feeler gauges
- Make iterative adjustments until desired flatness is achieved
Are There Adjustable Shims for Table Saws?
While there aren’t specific \”adjustable\” table saw shims, the process itself allows for adjustability:
- Use multiple shims of different thicknesses
- Stack shims to achieve desired height
- Add or remove shims for fine-tuning
This approach provides a flexible method for achieving precise leveling.
What Are the Cost Implications of Different Shim Options?
The cost of shims can vary based on material and quality:
- Commercial Shim Sets:
- Range from inexpensive hobbyist sets to costly precision sets
- Brass and stainless steel sets tend to be more expensive
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Prices vary based on assortment and precision
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DIY Shims:
- Very cost-effective
- Can be made from readily available materials like soda cans
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Minimal to no cost for basic materials
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Precision Machinist Shims:
- Higher cost due to exact tolerances
- Often sold in assorted sets with various thicknesses
- Investment can be worthwhile for frequent or professional use
What Challenges Might I Face When Shimming a Table Saw?
Shimming a table saw can present several challenges:
- Precision Difficulties:
- Working with very thin shims (0.001\”) requires careful handling
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Over or under-adjusting is common without proper tools and patience
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Material Stability Concerns:
- Some materials may compress or deform over time
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Choosing stable materials like brass or stainless steel is crucial
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Measurement Accuracy:
- Requires precise measurement tools like feeler gauges
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Small errors can lead to misalignment
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Time and Patience:
- Achieving perfect alignment can be time-consuming
- Requires multiple iterations of checking and adjusting
By understanding these challenges and using the right materials and techniques, you can effectively level your table saw for optimal performance and accuracy in your woodworking projects.
References:
1. Instructables: Safely Making Wedges and Shims on a Table Saw
2. Fine Woodworking: Table saw top-how level?
3. IQS Directory: Metal Shims: Types, Applications, and Advantages