One-piece base and registration faces
The steel base carries horizontal and vertical board faces and can be clamped or bolted to the bench; it is not a stack of detachable plates.
Power Tools / Joinery / Field guide
Dovetail Jig
Register boards and guide a router through repeatable half-blind, through and box-joint patterns.
12 in stock widthCapacity4211 + 4213Templates
01 / Tool anatomy
See the assembled tool and its components
An original educational poster identifies 8 documented construction features. The numbered descriptions remain readable below the artwork on narrow screens.
- Single-piece steel base
Holds both clamping faces and supports the installed template.
- Upper cam clamp
Locks a horizontal workpiece under a sandpaper-backed bar.
- Front cam clamp
Registers and restrains the vertical board on the base face.
- 4211 half-blind template
Guides half-blind, rabbeted half-blind and sliding dovetails.
- 4213 through/box template
Interchanges with the 4211 for through dovetails and box joints.
- Adjustment knobs
Set and secure the documented template/clamp positions.
- Two router bits
A dovetail bit and straight bit cut the matched joint profiles.
- Guides and lock nuts
Two template guides with lock nuts register a compatible router.
Technical references: PORTER-CABLE 4212 official product and kit contents · PORTER-CABLE 4210/4212/4216 official instruction manual. The single-piece steel base and its clamp mechanisms remain together. Two included aluminum templates are interchangeable. Router bits, template guides and lock nuts are supplied accessories; the view explains kit relationships, not a service sequence. Original educational artwork depicts documented component groups and their relationships; it is not a service sequence or a replacement for the exact model manual.
02 / Understand the tool
What it is and what each part does
The PORTER-CABLE 4212 is a 12-inch jig supplied with interchangeable 4211 half-blind/sliding and 4213 through/box-joint templates, two matching router bits, two template guides and lock nuts. Its durable single-piece steel base requires no assembly. The illustrated metalwork is original and unbranded; specific model names remain in the technical references so users can verify setup. A template fixes spacing and geometry but the router, bit, guide and stock thickness must still match the intended joint.
Cam-type clamps press sandpaper-backed bars against horizontal and vertical workpieces on the base. The installed machined aluminum comb provides a path for a compatible router template guide. The selected bit cuts one joint family at the depth established by the maker's depth gauge and a test fit. The construction view leaves the factory-assembled base and clamps intact while showing the two documented templates and included router accessories as separate kit groups. It is not a service sequence.
Cam clamps and locking bars
The two cam levers tension sandpaper-backed bars against the boards. Clean contact surfaces and adequate clamp pressure prevent a board from shifting.
4211 and 4213 templates
Machined aluminum combs interchange for different joint families. Their end slots and brackets support alignment; template teeth are not adjustable individual fingers.
Router bit and guide set
The included dovetail and straight bits pair with specific guides and lock nuts. Verify the exact template/bit/guide combination in the manual.
01 / Working relationship
How the main groups connect
02 / Working setup
Keep both boards registered against the template
02 / Working principle
Set, guide and control the action
These decisions make the mechanism useful at the bench.
Secure the base and stock
Fasten the base to a stable bench. Seat the reference edges and engage both cam clamps before approaching with a router.
Choose a joint recipe
Select the appropriate 4211 or 4213 template and its matching bit and guide. Follow the manual's stock orientation and depth gauge.
Test fit before final boards
Cut scrap of the same species and thickness, then adjust depth or template position only as the maker describes.
Drawer corners
Use half-blind dovetails where the front should conceal the joint ends; label inside/outside faces before clamping.
Box corners
Use the through-dovetail or box-joint template with the documented matching bit and guide.
Sliding connection
Use the 4211 sliding-dovetail arrangement only with the stock and router setup shown in the manual.
03 / At the bench
Setup, technique and finish quality
Use the steps for a first pass, then inspect the work before changing the setup.
- Identify stock faces, joint type, template, bit and guide before mounting the router.
- Secure the one-piece base to the bench and verify both clamp bars hold the boards without rocking.
- With the router unplugged, install the specified guide and bit; confirm guide-to-bit clearance.
- Seat the template brackets and align the maker's witness lines to the workpiece reference edges.
- Set bit depth using the maker's gauge, then make a complete matching test joint in scrap.
- Route with the base supported and the guide in contact with the template; follow the manual's feed and multiple-pass instructions.
- Stop the router and wait for the bit to cease before unclamping or changing the setup.
Template spacing is fixed
The 4211 and 4213 combs set their own pattern; trying to move individual teeth would damage the tool.
Fit is a system result
Stock thickness, reference orientation, bit depth and matching guide affect whether the two boards assemble.
The base remains assembled
The maker supplies a one-piece base; the study separates interchangeable templates and accessories rather than inventing base internals.
What changes by model or material
Hides the end grain on one show face and uses the documented 4211 combination.
Shows tails and pins on both faces and uses the 4213 configuration.
Straight interlocking fingers use the 4213 template with the correct straight-bit setup.
Choosing the tool
- Confirm maximum board width and thickness against the exact 4212 manual.
- Check whether the included templates cover the joint families you will cut.
- Confirm router guide compatibility and the correct shank and speed rating for the supplied bits.
Useful accessories
- 4211 half-blind/sliding template
- 4213 through/box-joint template
- Two template guides and lock nuts
- Compatible router
Consumables
- Sharp matching router bits
- Matched test stock
- Replacement clamp-bar abrasive only as approved by the maker
04 / Keep control
Care, troubleshooting and safety
Stop the tool and disconnect power before investigating a fault or changing a part.
Care checklist
- Brush chips from template slots, clamping faces and adjustment areas after use.
- Inspect cam pressure and sandpaper-backed bars for secure grip.
- Keep bits clean and sharp; inspect guides and nuts for wear.
- Store the second template flat so its fingers and alignment surfaces are not bent.
Common mistakes
- Using a guide bushing or bit from the wrong template recipe.
- Clamping boards with reference faces reversed.
- Skipping matched scrap test cuts.
- Moving the router while the bit is still spinning outside the intended guide path.
Safety at the operation
- Unplug the router before changing bit, guide or template.
- Secure the jig to the bench and keep both boards firmly clamped.
- Wear eye and hearing protection and capture routing dust.
- Keep fingers away from the comb openings and use the manual's feed direction.
When the result goes wrong
Verify template/bit/guide pairing, bit depth and stock orientation; adjust on scrap according to the manual.
Inspect clamping, template bracket position and router guide contact; check whether the stock shifted.
Check bit sharpness, support and the maker's staged cutting approach.
05 / Sources to keep learning
Manuals and educational resources
Use the exact tool manual for setup, limits and replacement parts. These lessons, documents and model pages teach relevant techniques or help compare real variations.
Manufacturer manuals
Learn and compare
06 / Manufacturer directory
Manufacturers & Brands
These maker-owned links document relevant tools and tool brands. A product brand may use another company's factory; compare the exact model before choosing parts or accessories.
Choose parts for the exact model
Cutters, abrasives, guards, guides, dust fittings and service parts vary by tool. Check the model plate and manufacturer manual before ordering or changing a component.
Compare the Joinery family →Continue through the Tools library