Lock guide

S&G 6741: opening it without drilling

What the lock is, whether a safe autodialer covers it, and what the job actually looks like from setup to open.

AutoDialer V4 units mounted on test plates in a workshop with opened lock bodies on the bench — Four-wheel locks get tested the same way as three — on the plate first.

The lock

Another Group 2 mechanical dial lock from the same 6700 family, widely fitted to commercial and government safes.

Group 2 mechanical combination lock
Three wheels
Standard dial geometry
Same supported range as the rest of the 6700 family

Does the AutoDialer V4 open it?

The machine is built for Group 2 mechanical combination locks, three-wheel and four-wheel, with the dial turning either direction. A lock of this type falls inside that range.

From the machine's point of view this behaves like the rest of the 6700 family. Mount coaxially, select three wheels and the dial direction, and start at the coarse step.

We would rather turn away an order than take one we cannot deliver on. Send a photo of the dial and the model number and we will confirm before you buy — and if the lock is outside what the machine handles, we will tell you that instead.

A floor safe standing open with the autodialer still mounted on its dial — A longer scan than a three-wheel lock, with the same ending.

What opening it looks like in practice

Mount the machine coaxially with the dial on the magnetic base and check by hand that it turns tight, smooth and without slip.
Select the number of wheels, the dial direction and the coarse step, then start.
Walk away. The coarse sweep on a three-wheel lock covers the whole range in about 50 minutes.
If it finishes without opening, step down to the next finer setting and run again.

The safe is undamaged throughout, keeps its original lock, and keeps whatever certification it carried. Full timings are in how long an autodialer takes on a Group 2 lock.

What it will not help with

If the safe has an electronic keypad rather than a dial, or a time lock, or the lock's internal mechanism is already broken, a dialling machine is not the answer. A photo will usually settle which situation you are in.

Not sure whether it covers your lock?

Send a photo of the dial and the lock model. We'll tell you honestly whether the AutoDialer V4 handles it before you spend anything — and if it doesn't, we'll say so.

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