Dargan Adjustable Speed Square - 150mm - CT40
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Product Information
Full details
The Dargan 6 inch (150mm) Adjustable Speed Square is a versatile, precision-engineered tool designed for carpenters, woodworkers, and roofers who demand accuracy in a compact form factor. Its robust aluminum build offers exceptional durability for job site conditions, serving as a multi-functional bevel, protractor, and saw guide in one package. While its size is perfect for portability and quick markings, users should note that its 150mm length may be limited for large-scale timber framing projects compared to larger framing squares.
All features
| Model Part Number | DAR-CT40 |
|---|---|
| Brand | Dargan |
Extended Product Information
FAQs
Is this square suitable for large roof framing?
While effective for marking, the 150mm size is generally better suited for smaller projects or detail work; for large-scale roof rafters, a 300mm (12 inch) square is usually preferred.
Does it come with instructions?
Yes, the product includes full instructions to assist with common tasks like setting angles and using it as a saw guide.
What material is it made of?
The square is constructed from high-quality, durable aluminum.
Can it be used as a protractor?
Yes, the adjustable design allows it to function as a protractor for finding and transferring angles.
Are the markings etched or painted?
The markings are permanent and designed to be easy to read throughout the lifetime of the tool.
Can this be used as a circular saw guide?
Yes, the thick edge of the square provides a stable fence for guiding circular saw baseplates during crosscuts.
Troubleshooting
Adjustment knob feels stiff
Clear any trapped sawdust from the sliding track and apply a small amount of dry lubricant if necessary.
Measurements seem slightly inaccurate
Check that the pivot screw is fully tightened and ensure the base is flush against the edge of the material being measured.
Pros and Cons
Pros
- Lightweight yet highly durable aluminum build
- Easy-to-read permanent markings that won't fade
- Versatile design replaces multiple individual tools
- Excellent for tight workspace layouts
- Includes helpful instructional documentation
Cons
- 150mm length is limited for very large wood projects
- Metal edge can scratch delicate finished surfaces if handled roughly
- Adjustment screw requires occasional checking for tightness
Setup, Compatibility & Care
To begin using the tool, ensure the adjustable pivot is tightened to your required angle using the locking knob. Before making critical cuts, it is recommended to verify the angle against a known reference point.
For care, wipe the aluminum body with a dry cloth after use to remove sawdust and moisture. Keep the pivot mechanism clean of grit to maintain smooth adjustment movement. If you encounter heavy debris, use a soft-bristled brush to clear the markings and adjustment slot. Store in a dry tool bag or on a wall rack to prevent the square from falling or colliding with other heavy iron tools that could ding the precision edges.