Manual Rebar Bender
Bending a rebar implies its conditioning according to the levels from a project, in other words bending the rebars at the proper angles and distances. It can be done manually or mechanically. A manual rebar bender is an old tool used at the beginnings of this industry. However, it is still used these days for small crafts. In large industries, the manual rebar bender has evolved into the automatic one. It is not even a bender anymore, but a real large scale machine that can work with multiple rebars at the same time.
A manual rebar bender must be used with a slow and smooth motion, without any shocks. For the rebars with a 25 mm or more diameters, the worker has to get the metal hot before, otherwise there might be problems due to the shocks. Although it is not that common, workers should know that a manual rebar bender must not be used at temperatures below -10 degrees Celsius. It is not the tool that might cause problem, but the properties of the metal change at such low temperatures. The rebars are bent after an arch with a ray of at least 10 d. also, if the heads have beaks, they will be executed according to the project details.
Using a manual rebar bender is usually done on a work table with fixed helping attachments for bending. The instrument is made out of metal and it has a rigid and plain surface. The rebars might need to be measured and marked with a piece of chalk. There are many and continuously improving attachments that come to help a manual rebar bender, such as:
- Simple or double wrenches
- Drilled plates
- 2, 3 or 4 pegs plates
- Chopped peg and fixed wrench plates
The simple or double wrenches have various dimensions, depending on the diameter of the rebars. The small diameter rebars can be bent with just two wrenches. When using just one wrench, it is necessary to have a 3 or 4 pegs plate, in order to attach the roles with various exterior diameters. All this, to ensure the bending is done at the requested curving line.
Since this is how a professional manual rebar bender works, you might think it is too much for the little crafts you have to do around your home. You may just as well purchase a less professional rebar bender that looks pretty much like a clipper. The principle of working is the same, although it requires less work and no attachments at all. Such a manual rebar bender is usually the option most garage craftsmen prefer. It is small and easy to use. It is also ideal to use for small repairs or various improvements in your house. The price for a manual bender differs for each model. They cost between $400 and thousands. However, if you'd like to purchase a no name one from the shop around the corner, the price may be way smaller. But then, you got no warranty period and you can only hope it will be useful for the work you have to do.