Product Description
The CMT300-T080 Box Joint Template is a precision-machined 8mm (5/16") tongue joint template designed for use with the CMT300 Universal Dovetail Jig. Color-coded in blue for fast, confident template identification at the bench, this 300mm template makes it straightforward to cut consistent, clean box joints in stock ranging from 5/16" to 25/32" thick. Supplied with a matching Diameter 11.1 x 4mm (7/16" x 5/32") precision guide bushing, it gives woodworkers everything needed to achieve tight-fitting box joints with a standard straight bit - no guesswork, no mismatched accessories.
Key Features
- 8mm (5/16") dovetail/joint size - delivers precise, repeatable tongue joints at a common furniture and box-making dimension, reducing setup time between cuts
- Blue color-coded template - allows instant visual identification when working with multiple CMT300 templates, eliminating mix-ups during production runs
- 300mm total template length - provides ample guiding surface for consistent joint alignment across wider workpieces
- Maximum stock thickness range of 5/16" to 25/32" - accommodates a practical range of hardwood and softwood panel thicknesses commonly used in drawer boxes and cabinet joinery
- Supplied with a Diameter 11.1 x 4mm (7/16" x 5/32") precision guide bushing - the correct guide bushing is included so the template is ready to use with a compatible straight bit without sourcing additional hardware
- Designed for use with straight router bits - compatible with straight cutting bits at the 5/16" diameter, keeping bit selection simple and accessible
- Engineered for use with the CMT300 Universal Dovetail Jig - integrates directly into an established jig system for a secure, repeatable fit every session
Why This Product
- The included Diameter 11.1 x 4mm (7/16" x 5/32") precision guide bushing means you have the correctly matched bushing in hand from day one - no separate sourcing, no compatibility risk, and no delays getting to your first cut.
- The 5/16" joint size hits a versatile sweet spot for drawer box and cabinet carcass construction, making this template a practical daily-use choice for woodworkers who regularly work in that thickness range.
- Blue color coding on a dedicated CMT300-system template means that users working with multiple joint sizes can swap templates quickly and confidently, reducing the chance of selecting the wrong template during a production session.
- At 300mm in length, this template integrates with the CMT300 jig platform's full guiding capacity, giving woodworkers a controlled, well-supported reference surface for accurate, repeatable box joints in material from 5/16" to 25/32" thick.
Specifications
- Model Number: CMT300-T080
- Brand: CMT Orange Tools
- Type: Box Joint Template
- Diameter: 8mm
- Total Length: 300mm
- Joint Size: 8mm (5/16")
- Maximum Stock Thickness: 5/16" - 25/32"
- Color Code: Blue
- Required Precision Guide: Diameter 11.1 x 4mm (7/16" x 5/32")
- Compatible Straight Bit: Straight bit, Diameter 5/16", Shank 1/4"
- For Use With: CMT300 Universal Dovetail Jig
What's Included
- 1x CMT300-T080 Box Joint Template (blue, 8mm / 5/16")
- 1x Diameter 11.1 x 4mm (7/16" x 5/32") precision guide bushing
Frequently Asked Questions
What jig is this template designed to work with?
The CMT300-T080 is designed specifically for use with the CMT300 Universal Dovetail Jig. It is not a standalone item - it functions as part of that jig system to guide the router for box joint cuts.
Does this template come with a guide bushing, or do I need to purchase one separately?
A Diameter 11.1 x 4mm (7/16" x 5/32") precision guide bushing is supplied with the CMT300-T080, so you do not need to source a bushing separately for this template.
What type of router bit should I use with this template?
This template is intended for use with straight router bits at the 5/16" diameter. It is designed for tongue (box) joints, not dovetail-profile bits - a standard straight bit at the correct diameter is the appropriate choice.
How do I tell this template apart from other CMT300 templates at a glance?
The CMT300-T080 is color-coded blue, which corresponds to the 8mm (5/16") joint size. The color-coding system on CMT300 templates makes it easy to select the right template quickly without having to measure or read fine print during setup.
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