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Cutting the B106 key, also known as the GM Circle Plus key, is one of the most challenging tasks for many locksmiths, especially when using an inexpensive, two-sided jaw key machine. Most locksmiths rely on four-way jaw machines or specialized B106 key adapters, but what if you want to cut this difficult key using a standard, budget-friendly duplicator?
In this guide, we take you step-by-step through the process of properly clamping and cutting a B106 key on a simple key duplicator, demonstrating that yes, you can cut even difficult edge-style keys with the right technique. Whether you're a beginner locksmith, a professional key cutter, or a technician looking to master difficult automotive keys, this tutorial will help you understand the correct angles, clamping positions, cutting techniques, and problem-solving approaches.
And if you need a quality B106 blank, key adapters, or professional key-cutting machines, clksupplies.com has everything you need.
The B106 key is considered one of the hardest edge-style keys to duplicate because:
Its milling is uneven, making the gripping surfaces tricky.
There is very little “meat on the bone” on Side 2.
Many keys require specialized adapters.
Incorrect clamping causes the key to shift or angle during cutting.
Tight tolerances demand smooth, precise cutting passes.
Despite the challenges, you can cut this key accurately with the right approach, even on a simple two-jaw key duplicator.
Below is a step-by-step guide for cutting a B106 key using a simple key duplicator:
Before cutting, take time to compare your duplicator’s jaws with the key’s milling.
Basic and open.
Works for standard cuts.
Stable for most basic automotive keys.
Designed to hold trickier keys.
Features uniform gripping points.
Good for keys with grooves.
The B106 key’s grooves are NOT uniform, meaning you cannot rely on traditional gripping points.
Instead, choose the second most “true” flat area, a stable surface on the lower part of the key where the jaw can clamp safely without rocking or twisting.
This positioning ensures the cuts remain aligned and prevents chatter marks.
Here’s the correct approach:
Insert the original B106 key into the left jaw.
Use the tip stop to guarantee perfect depth alignment.
Gently tighten while rocking the key to confirm a firm hold.
Insert the blank B106 key into the right jaw the same way.
Avoid pushing down too hard; excess pressure may misalign the key.
Pro Tip:
Rocking the key slightly is the best way to ensure even clamping on uneven keys like the B106.
Cutting the first side is usually straightforward:
Lower the cutting wheel slowly.
Move along the key in a smooth, consistent motion.
Brush away debris as needed.
Side 1 typically cuts cleanly without any special technique.
This is where most locksmiths struggle.
The key’s second side has less surface area for clamping, meaning the blank may shift if cut aggressively.
To avoid stressing the blank:
Use two light passes instead of one heavy cut
Hold the cutting carriage back slightly to reduce pressure
Move slowly and smoothly
Always support the key to avoid vibration
This multi-pass technique gives you a clean, accurate cut without risking damage to the key or duplicator.
Once both sides are cut:
Brush off excess debris.
Inspect the milling for burrs or uneven edges.
Test the key in the lock or ignition.
If everything was done correctly, the key should insert smoothly and operate normally.
For the highest-quality locksmith tools, key blanks, duplicators, and adapters, clksupplies.com is the industry’s most trusted source. It offers advanced key machines, duplicators, automotive key adapters, and professional cutting tools. From multi-jaw precision machines to beginner-friendly duplicators and essential locksmith training supplies, you’ll find everything needed to cut B106 keys accurately and fully equip your locksmith shop.
Cutting a B106 key doesn’t have to be complicated, as long as you understand how to work with its design and use the right equipment. A basic two-way jaw duplicator can absolutely handle the job, but it requires patience, correct clamping, and precise cutting technique to ensure the key functions perfectly.
For locksmiths who frequently cut B106 or other challenging automotive keys, upgrading to a four-way jaw machine is a smart investment. The added stability, better grip options, and enhanced accuracy not only speed up workflow but also reduce the risk of errors. Whether you stick with a two-way jaw duplicator or choose to invest in a more advanced machine, mastering your technique is key to consistently producing high-quality results.
The B106 key is challenging because of its thin profile, specific shoulder alignment, and the need for precise clamping on both cutting sides. Its unique design requires multi-pass cutting and controlled pressure to avoid bending or miscuts. This makes proper technique and tool selection essential for accuracy.
Yes, beginners can cut a B106 key, but they must follow the correct setup steps and use a duplicator that properly grips the key’s narrow blade. With slow cutting speed, steady pressure, and careful alignment, even new locksmiths can produce reliable copies without damaging the key blank.
To avoid mistakes, always inspect the key blank, ensure tight jaw clamping, and avoid rushing the cut. Use multiple shallow passes instead of forcing the blade. After cutting, test the key’s smoothness and verify cut depths against the original key for accuracy before handing it to the customer.
A two-way jaw duplicator works, but a four-way jaw machine provides better grip, stability, and precision. Many professional locksmiths also prefer machines with multi-pass cutting capability and adjustable jaws designed specifically for thin automotive keys like the B106.
