Found it for less? Submit a Price Match. See what our customers are saying about us: Customer Reviews. Zilla Cash Program. ZillaCash Silver. ZillaCash Gold. JavaScript Disabled. We have updated our Privacy Policy. Please click here to review the updates. What is a banjo bolt? A banjo bolt is a fastener that holds a banjo together, of course. Image Gallery. Subscribe to. Share 0 Join the Discussion. Insert the two tips in the female end for internal measurement and open the measuring tips up until they are snug against the interior walls.
Observe and record your measurement. There are also cheap, preset measuring devices along with nut and bolt thread identifier tools. Click the link to Amazon and get Banjo Fittings Today! These are essentially cable strings full of pre-sized gauges that have both a female end and a male end.
For these to be used, you have to be dealing with a threaded banjo bolt or insert. While prevailing advice would be to stick with calipers only, these are plenty viable for measuring banjo fittings. Many of them are good for measuring banjo fittings that do not have threads. Banjo bolts and variations of the banjo design are used in many different applications.
Basically, anything that puts fluid under pressure within complicated systems is likely to have a banjo fitting for some uses within that architecture. Banjo fittings are most commonly used in any system that utilizes hydraulics, fuel filters, power steering designs, brake connectors for brake fluid passage, and oil-fed turbochargers.
It enhances the strength of the connection with steel fittings versus PVC and also lowers the profile of the design. PVC piping is another story altogether. PVC elbows can get pretty small, however, the angle at which the tubes have to enter each end is restricted to very light angles, taking up too much space lengthwise. The list is exhaustive and this by no means covers all of it, however, this is a solid, broad view of the type of applications that banjo bolts and fittings work well in.
In clutch, brake, variable-valve timing, and most hydraulic power systems, banjo designs are important. Not only do these systems push fluid through tubing—both copper and rubber—at extremely high pressure, they also do so suddenly with very little build-up. Brake fluid, for instance, is essentially on standby until you press down on the brake pad.
Hydraulic fluid is then squeezed through numerous, small tubes instantaneously. This high-pressure fluid pushes a piston—that is located inside the master cylinder—which pushes additional fluid into the calipers which squeeze the brake pads together. Banjo bolts get their name from the shape of the fitting, which has a large circular section coupled to a thin pipe. This construction gives it the form of a musical instrument known as the banjo. There is no need for rotation when being fixed to the host fitting with banjo fittings, so the risk of damage is reduced.
Banjo bolts are also known as internally relieved because of their hollow interior. This open interior allows fluid to flow inside and exit through a small hole at the side. The bolt then locks into a system to control fluid performance and pressure. In such systems, the banjo bolt attaches the brake lines to the cylinder to regulate the pressure in response to the activation of the brake pedal.
So what is banjo bolt on brakes? They are essentially connectors that link brake-fluid lines to brake cylinders. Banjo bolts are built to handle extremely high pressure, which is critical for many fluid systems. The importance of banjo brakes is most apparent with hydraulic systems designed to transform light pressure into more power. With such systems, the fluid is held under pressure, and it is the pressurized fluid that allows the system to function the way it does.
Any loss of pressure weakens hydraulic systems, so hydraulic banjo fittings are a crucial part of hydraulic brake systems. A well-installed banjo bolt has a very tight seal further reinforced by a banjo bolt washer that is fitted to it. These washers allow fluid to pass around the bolt, so the holes in the bolts do not need to line up, so the installation of flexible lines becomes easier. That said, banjo bolts often come with a rating that provides information about the best pressure limits for the bolts.
How tight should a banjo bolt be? The amount of torque applied should be in line with the specific requirements for the particular banjo bolts. Avoid excess torque. After some time, banjo bolts need replacement.
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