Mortise Lock Jig: A Must-Have Tool for Clean Lock Installations

The mortise lock jig is an essential tool for any locksmith, carpenter, or door installer who values precision, speed, and professionalism. Whether you're working on timber doors in Sydney or aluminum doors in Auckland, a mortise lock jig helps you cut perfect pockets for locks — every time.

This tool eliminates guesswork and human error, making it easier to impress clients with clean, symmetrical installations. Let’s break down how this tool works, why it’s worth investing in, and how to choose the best jig for your next job.

What Is a Mortise Lock Jig and What Does It Do?

A mortise lock jig is a routing template that guides your router or drill when cutting the cavity for a mortise lock. It ensures the lock fits precisely into the door without chipping or uneven edges — critical for both function and aesthetics.

Most jigs are adjustable to match different lock sizes and backsets, making them versatile for residential, commercial, and security doors. When paired with a router guide or Makita plunge router, the mortise lock jig ensures fast and clean results, even on dense hardwoods.

Why Every Locksmith Needs a Mortise Lock Jig

Installing mortise locks manually takes time and skill. Without a mortise lock jig, you risk drilling too deep, going off-center, or damaging the door — all of which can lead to expensive rework.

With a jig:

• You get perfectly centered and clean cuts
  
  

• Installations become quicker and more consistent
  
  

• The final result looks professional and secure
  
  

It’s a game-changer for locksmiths, security contractors, and door specialists who install multiple locks per day.

Best Tools to Pair with a Mortise Lock Jig

To get the most out of your mortise lock jig, pair it with high-quality tools such as:

• Makita plunge routers – powerful and compatible with most jigs
  
  

• Router templates – for different lock sizes and styles
  
  

• Door clamp stands – to keep the door upright and steady
  
  

• Self-centering jigs – to align the lock exactly on the center line
  
  

Using these tools together ensures your lock installations are smooth, secure, and repeatable — saving time on every job.

How to Use a Mortise Lock Jig: Step-by-Step Instructions

Here’s how to use a mortise lock jig like a pro:

1. Clamp the door using a door clamp stand to keep it vertical
   
   

2. Adjust the jig to match your mortise lock’s dimensions
   
   

3. Mark the centerline of the door edge for accurate placement
   
   

4. Fix the jig in place, securing it tightly with clamps
   
   

5. Use a router with the correct bit to cut the mortise pocket
   
   

6. Drill holes for latch and spindle, then install the lock
   
   

This process is much faster and cleaner than manual chiseling and reduces the risk of error, especially on expensive or custom doors.

Mortise Lock Jig vs. Manual Chiseling: Which Is Better?

Using a mortise lock jig is significantly more efficient than traditional hand-chiseling.

If you're working on high-end doors or bulk installations, a mortise lock jig is the better choice — and Fast Hinge has premium options trusted by tradies across Australia and New Zealand.

Where to Buy Mortise Lock Jigs in Australia and New Zealand

Many hardware stores like Bunnings carry general jigs, but if you're after trade-quality tools specifically for door carpentry, it's best to buy from a specialist supplier like Fast Hinge.

Why choose Fast Hinge?

• We offer high-precision jigs designed for professional locksmiths
  
  

• Our tools are tested and trusted by real tradies
  
  

• We ship across Australia and New Zealand with fast delivery
  
  

• We provide customer support to help you choose the right jig
  
  

You can browse all available models in the Fast Hinge online tradie shop and find compatible jigs for the locks you install most.

Common Mistakes to Avoid When Using a Mortise Lock Jig

Even with the best jig, mistakes can happen if you’re not careful. Here’s how to avoid them:

• Forgetting to measure the backset properly
  
  

• Using the wrong router bit size for the lock cavity
  
  

• Failing to clamp the door securely, causing misalignment
  
  

• Skipping test cuts on scrap wood before working on the actual door
  
  

By taking a few extra minutes to prep properly, you’ll get perfect lock fits every time — without having to fix avoidable mistakes.

FAQs About Mortise Lock Jigs

What is a mortise lock jig used for?

A mortise lock jig helps cut the exact shape and size of a lock cavity in a door using a router, ensuring a clean and precise fit.

Can I use a mortise lock jig with a Makita router?

Yes, most mortise lock jigs are compatible with Makita plunge routers and other standard router models used by tradies.

Is a mortise lock jig better than chiseling by hand?

Absolutely. A mortise lock jig provides faster, cleaner, and more accurate results compared to hand tools.

Do mortise lock jigs work on metal doors?

Most mortise lock jigs are designed for wood, but some can be used on soft metals. Always check the product specs.

Where can I find locksmith tools and jigs in New Zealand?

Visit the Fast Hinge website for high-quality locksmith tools, jigs, and door installation accessories shipped across New Zealand and Australia.