Starrett Arbor Extension - 300mm
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Product Information
Full details
The Starrett A5 Arbor Extension is an essential tool for professional tradespeople and serious DIYers who need to reach deep drilling locations that standard hole saw arbors cannot access. By providing a 300mm (approximately 12-inch) reach, this extension significantly enhances the versatility of your hole saw kit, allowing for cleaner cuts in deep-set materials. Note that while this tool provides critical extra reach, the additional length can increase the risk of bit whip or vibration if the drill is not kept perfectly square to the workpiece.
All features
| Model Part Number | 1368055 |
|---|---|
| Brand | Starrett |
Extended Product Information
FAQs
Is the Starrett A5 compatible with non-Starrett arbors?
The A5 is specifically designed for Starrett A2, A17-12, and XA2 arbors. While it may physically fit other brands, we recommend using it only with specified Starrett products to ensure safety and performance.
Does this extension work with quick-change arbors?
The A5 is designed for use with specific fixed-shank arbors. Compatibility with proprietary quick-change systems may vary.
How long is the extension exactly?
The extension provides 300mm of additional length to your existing arbor assembly.
Can I use this extension for metal drilling?
Yes, it is suitable for metal, provided the drill speed is kept low and proper cutting fluid is used to manage heat and friction.
Will this fit a standard 3/8-inch drill chuck?
Yes, provided the arbor you are attaching to the extension has a shank compatible with your chuck size.
Troubleshooting
The arbor vibrates excessively during drilling.
Ensure the connection between the arbor and the extension is fully tightened and that the pilot drill is sharp and centered.
The extension keeps coming loose.
Check the set screws on your arbor for wear and ensure they are tightened with the correct hex key to the required torque.
Pros and Cons
Pros
- Significantly extends the reach of standard hole saws
- Compatible with a wide range of popular Starrett arbors
- High-quality steel construction for longevity
- Easy to attach and remove for quick workflow changes
Cons
- Increased length requires careful handling to prevent wobbling
- Requires proper alignment to avoid binding in deep holes
- Not intended for use with very small diameter hole saws where high speed might cause instability
Setup, Compatibility & Care
To install the extension, simply insert the shank of your compatible A2, A17-12, or XA2 arbor into the A5 extension's female end and secure it according to the manufacturer's arbor specifications. Always ensure that the set screws are fully tightened before starting the drill motor.
For maintenance, keep the connection points clean of sawdust and debris to ensure a tight fit. Periodically apply a light machine oil to the threads if your specific arbor model uses threaded components. When not in use, store in a dry location to prevent surface oxidation, and avoid dropping the extension on hard concrete, as any significant bend in the shaft can lead to vibration during future use.