The knurled brass bushing
is a versatile part that can be used in almost any application. It comes in a wide variety of designs, sizes and materials. It can be used to mount a motor to a shaft, or to provide cushioning to a shaft.
The soft but sticky nature of brass makes it an excellent choice for bushings because it is easy to snug up tight using a pair of pliers, and it also allows for easy hand-tight fittings as well. Its anti-rust properties help prevent rusting, and its anti-friction characteristics allow it to reduce friction between the shaft and bushing.
It is not as strong as steel, but it can be made to withstand higher loads and impact. It is also more resistant to wear, and it can resist corrosion and deterioration.
A knurled brass bushing can be found in many types of equipment, from water-cooled car engines to solid-body guitars. It is a common accessory for rotary valves, air intake hoses and other components.
They are typically available in both imperial and metric sizing. Imperial sizing is usually preferred for American-made equipment.
There are several types of knurled brass bushings, including drill-bushing, cast-in-place, and template bushings. The most common of these is the drill-bushing.
For drill-bushing applications, a jig plate is drilled and reamed to the proper diameter and then a template bushing is placed in the hole. It is then inserted into the jig plate and pressed into place.
The jig plate is then secured to the workpiece with a lockscrew locating jig or a round clamp.
A knurled bushing can be used for a number of different applications, but most often they are designed to provide the highest level of durability and reliability. It is a good idea to check with the manufacturer for recommended specifications before ordering a bushing.
Choosing the Right Style of Bushing for Your Router
One of the most common styles of guide bushing is a straight drop-in type.
Another option is a template bushing, which is mounted in the jig plate using a locking device. This method saves time and money by reducing the need for drilling and reamering.
Other knurled bushings include a radial-located, headless design called press-fit. These bushings are pressed directly into the jig plate. They can be positioned very close together in the jig plate and are well suited for applications where holes are very closely spaced.
For cast-in-place applications, a diamond-pattern knurl is molded onto the circumference of the bushing to increase resistance to rotational and axial loads. The knurl helps align the bushing in the hole, but the inner diameter of the bushing must be ground to match the outer diameter of the jig plate to avoid misalignment.knurled brass bushing