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Padlocks Technical Advice Centre

This is our dedicated help, advice and testing results section for padlocks. Every time we get a good question from a customer, or asked to test a product, then we post the answer or results here. Use the list of Categories or the Search Box below to find the answer you're looking for. Don't worry you can get back to your basket our products by clicking our logo above.

We've also created a concise guide with the most commonly asked questions to download and print here:

How to lock a manhole cover with a padlock

We’ve been asked how it is possible to lock a manhole cover to a drain system or subway. There are some specialist locking manhole covers but they require some significant changes to the rim of the cover and the cover itself which can be shockingly expensive. The low cost or DIY way to achieve this […]

What is the best type of chain for a closed shackle padlock?

A closed shackle padlock offers a lot more protection from bolt cutter and saw attacks but it does restrict the space for any fittings. However, this does not mean you cannot use a chain. You need a good quality hardened steel chain which comes with one of the end links longer than the other. This […]

What type / size bolt holds in a padlock cylinder?

The cylinder just dropped out of my padlock and the screw that retains the cylinder fell on the floor and I lost it. What size do I need to replace it? Answer: 5mm Countersunk M4 Bolt (in most padlocks) Occasionally we get questions on the bolt that holds a cylinder into a lock. This is […]

Is graphite powder a good lubricant for padlocks?

You published a video on YouTube for lubricating padlocks. You do not mention graphite powder. Do you recommend this? Dan Hunt, London Good question. Graphite powder is a good lubricant especially in cold weather as it works well to prevent a lock from freezing. However, in the UK it is very humid even when cold. […]

What is the best way to prevent losing the padlock shackle?

Many good quality high-security padlocks come with a removable shackle. It is important to prevent the shackle from being lost when the padlock is in operation. There are a number of ways to prevent this loss and the method will depend on whether you have an open or closed shackle padlock. How can I retain […]

Can the shackle be completely removed from a Granit padlock?

We have bought a number of Granit Padlocks for shipping containers and they have lock boxes enclosing the padlock. Is it possible to remove the shackle to make it easier to fit the lock? Anonymous Customer Granit locks are very popular for shipping containers for this very reason. The lock uses a ball bearing to […]

What is the best lubricant for a padlock?

This is a very common question and often the mostly commonly used type, WD40, is the wrong choice. I’d be rich by now if I had £1 for every time a customer had told me their lock was still sticky only after a month of using WD40. The problem is that it simply drains out […]

Which key retaining padlock can be changed to be snap-shut?

Not all high-security padlocks will be able to be converted to the snap-shut option but a great example of one that can be is the Abus Extreme series. When you buy a high-security padlock they are often key retaining as standard rather than snap-shut. As the name suggests, when you open the padlock the key […]

How to prevent and remove superglue from a padlock?

Putting super glue into padlock is a common problem and 99% of the time it is local children causing mischief without appreciating the problems it can cause. Here are some tips on how to prevent it and how to deal with it if it does happen. Prevention 1. Soak in Diesel: The number one way […]

How Do I Prevent My Padlock Freezing?

Every year we get a number of enquiries asking for advice on dealing with this so here are a few hints and tips. Padlocks and the cold don’t go terribly well together. All padlocks, especially combination locks, use complex mechanisms with springs, pins and bars. These all expand and contract with a change in temperature and […]