What do bearing sizes mean?
The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.
Does it matter what bearings you get?
You can’t go wrong. Nearly all skateboard bearings have been standardized so that all wheel and bearing brands are compatible. The standard skateboard bearing size is an 8mm inner race diameter.
What does ZZ mean on a bearing?
Suffix
| 2 RS | Bearing with rubber seal on both sides. RS provides a better seal but more rolling friction than 2Z. |
|---|---|
| RS | Bearing with rubber seal on one side, one side open. |
| 2 Z / ZZ | Bearing with a metal seal on both sides. |
| Z | Bearing with a metal seal on one side, one side open. |
| E | Reinforced Design |
Do you need spacers for bearings?
Bearing spacers are totally optional; longboarders and casual skaters likely won’t put enough pressure on their boards to ever need them, though they are definitely a good investment if you want to slide, do a lot of tricks, and generally skate hard. Unlike bearings, bearing spacers are not one-size-fits-all.
How to determine bearing size?
Measure the width of the spindle in this location with a digital caliper. Close the caliper arms around the spindle and read the measurement on its display. Two common bearing sizes are bearing L44694 (1.063-inch width) and L44643 (1-inch width).
What is the smallest size of bearing?
Miniature deep groove ball bearings refer to the metric series, the outer diameter is less than 9mm; the inch series, all kinds of bearings with an outer diameter less than 9.525mm, the main materials are carbon steel, bearing steel, stainless steel, plastic, ceramics, etc., the smallest inner diameter can be achieved 0.6mm , generally more than 1mm inner diameter.
What are the dimensions of bearings?
All bearings will have an inner diameter (ID), an outside diameter (OD) and width (W). Bearings are sometimes referenced by these dimensions, in that order: ID x OD x W. Measure the ID
What is the standard size of a roller bearing?
Distributor of needle roller bearings. Specifications of needle roller bearings include 5 mm to 165 mm bore size, 10 mm to 190 mm OD & 10 mm to 63 mm width.