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Truck locks are an easy way to retrofit brakes to an existing trolley or mobile platform or as an alternative to braked castors. The truck locks have a foot operated pad that lowers a pad normally with a rubber surface down to the floor raising the wheels slightly above the ground and providing a friction brake. Also, called "trolley brakes".

truck and parking locks

truck lock model BZTL5

Data-sheet for the Truck Locks as detailed below (Model BZTL5 above)


Link to online shop for Truck Locks

truck locks online shop

The truck locks act as a brake as the platform or trolley is no longer able to move once the truck lock is engaged. The truck lock can easily be disengaged making it an ideal tool to keep a trolley stable, when loading or offloading.

BZTL series truck locks are of pressed steel construction with a zinc-plated finish (excluding BZTL4 which is cast iron with a black finish)

Truck / Trolley Locks Description

All truck locks are top plate mounted and bolted to the underside of the trolley. The principle on which they work requires a constant gap between the unit and the floor, so it is best to mount the truck lock close to a castor, ensuring that it does not interfere with the free movement and operation of the castor.

A step down foot-operated pedal moves a skid-resistant rubber pad into friction contact with the floor surface. This is done with a spring-loaded over-cam mechanism that does not lift the load and keeps the operating force low. It also means the load rating of the trolley is not relevant to the truck lock. A second step down pedal raises the footpad. The limited number of parts means there is less to maintain or go wrong.

Where a trolley has four swivel castors, two truck locks are required – one to be fitted at each end, either on the same side or diagonally opposite. Only one truck lock is required at the swivel end of a trolley that has two swivel and two fixed castors.
Truck Locks in action


Height mm


Height mm

168 136 BZTL1
168 136 BZTL1 ISO
195 155 BZTL2
245 205 BZTL3
245 205 BZTL3ISO
210 170 BZTL6

As well as the range of truck locks above we also have the following models that are generally held in larger stocks. Please note that the brackets are slightly different.

cdfln-8 truck lock


Quick Differences between the two models of Truck Locks from Merlin




Height mm


Height mm


Top Plate

Size mm

CDFLN-4 151 125 120 X 120
CDFLN-5 180 154 120 X 120
CDFLN-6 210 170 120 X 120
CDFLN-8 255 215 120 X 120
BZTL1 168 136 152 x 114
BZTL2 195 155 152 x 114
BZTL3 245 205 152 x 114
BZTL4 205 170 152 x 114
BZTL5 151 125 120 x 120
BZTL6 210 170 120 x 120
For pre-production and development design we would always recommend getting a sample truck lock/brake.

Side mounted Truck locks.

BZTL7L is a left hand or right-hand side way operated roll lock which is comprised of a pressed steel construction, with rubber foot pads of 80 mm diameter.
Fully extended height 381 mm and retracted height 346 mm, the Main lever extends out 228 mm, plate size 165 mm a 114 mm and with a blank plate so hole centres can be drilled at the site to match your requirements.
Close up images of the lowered and raised positions.

We now have a new range of  Parking and Lifting Brakes

lifting jacks for trolleys


Parking/Prop Jacks are a new range of high-quality jacks and are designed to hold loads up to 4000 kg.
The main jack body is supplied un-plated for welding directly to your units before painting.
Depending on the model, they are available with a side-winding or top winding handle and either round or square base plates with a maximum stroke of 450 mm.

Lifting Jacks are another new range of high quality lifting Jacks and are designed to hold and lift loads up to 4000 kg
The main jack body is supplied zinc plated and comes complete with a un-plated inner fixing tube for welding directly to your unit.
They are available with a side-winding handle and either round or square base plates with a maximum lift of 375 mm.

lifting jacks fitted to trolley

Now available from our online Truck Lock or Trolley Brake shop

Contact Us
Please contact us if you have any questions such as price or lead times. Merlin Industrial Products Ltd Unit A43 Kingsley Close, Lee Mill Industrial Estate Ivybridge Devon PL21 9LL United Kingdom Call: 01752 690622 Fax: 01752 313333
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