What does PCD mean? The Pitch Circle Diameter (PCD) is the diameter of the circle which passes through the centre of all the studs, wheel bolts or wheel rim holes. The easiest way calculate the PCD is as follows: 1) Measure the distance ‘S’ between two adjacent studs from the centre of each hole.

## What does PCD mean for wheels?

The most important element of wheel manufacture is the bolt pattern or ‘PCD’ (pitch circle diameter) of the wheel.

## How do you calculate PCD hole distance?

To calculate the division (distance between two nearby holes) of the PCD , multiply the diameter of the pitch circle and the given factor in the table. For instance, If 10 holes to be equally divided in a 100 mm pitch circle then the division, a = dia x 0.309 = 100 x 0.309 = 30.90 mm.

## How do you measure a PCD 4 wheel stud?

It is the diameter of a circle that is used to set the wheel nuts on. As shown on the diagram above it is easy to find the PCD on a 4 stud wheel. Just measure from the centre of one stud to the centre the opposite stud. This will work for any even number of studs.

## How do you find the diameter of a pitch circle?

The easiest way to calculate the PCD is as follows:

- Identify the size of the rim or tyre size. …
- Measure the distance ‘S’ between two adjacent studs from the centre of each hole.
- Using the calculator enter the number of studs/holes & ‘S’ and press ‘calculate’.

## What does PCD 100 mean?

100 is the simplest. So lets say you have an alloy with 4×100 PCD. It means it has four holes and the distance between one bolt hole and the one opposite to it is 100 mm. … It simple means the circumference on which all 5 holes are drilled, it has a diameter of 114 mm. Same way 6 bolt wheel PCD is measured.

## How do I check my PCD?

The P.C.D. of any wheel or hub with an even number of holes can be measured from the inside of one hole directly across to the outside of the hole opposite. To calculate the P.C.D. of a five stud wheel or hub, measure ‘X’ from the inside of one hole to the outside of the next hole and multiply by 1.7012.

## How do you calculate chordal distance?

The formula for the chord length is: 2rsin(theta/2) where r is the radius of the circle and theta is the angle from the centre of the circle to the two points of the chord.

## How do you find the distance between two holes?

If the holes are the same size, measure from the same edge (left edge to left edge or right edge to right edge) of the holes. That will be the same distance as center-to-center. Use a trusted tape measure starting at 10″ (not at the end hook). Measure and subtract 10″.

## What is chordal distance?

You may recall from your Geometry studies that a chord is a segment that begins and ends on a circle. Because each endpoint of the chord is on the circle, the distance from the center to begin{align*}Aend{align*} and begin{align*}Bend{align*} is the same as the radius length. …

## How do I know what stud pattern to use?

Stud patterns are commonly otherwise known as bolt patterns, bolt circles, lug patterns or PCD’s (pitch circle diameter) – nevertheless, stud patterns are determined by the diameter of a circle which runs through the centers of a wheels stud holes. Oftentimes, there are 4, 5 or 6 stud holes.

## Are all 5 stud wheels the same?

Will any 5 stud wheel fit any other 5 stud vehicle? … No, you need to check bolt PCD and wheel offset. You may also need spigot rings, and the bolts need to be the same type (some bolt heads sit at different angles).

## How do you measure a PCD flange?

REALLY HANDY TIP

- Sometimes it’s hard to measure the PCD of a butterfly valve or a flange that’s installed in pipework.
- As accurately as you can, measure two adjacent holes (see photo) and calculate the PCD.
- 4 holes: multiply by 1.414.
- 8 holes: multiply by 2.613.
- 12 holes: multiply by 3.864.
- 16 holes: multiply by 5.126.

## What is pitch circle diameter?

The Pitch Circle Diameter (PCD) is the diameter of the circle which passes through the centre of all the studs, wheel bolts or wheel rim holes. The easiest way calculate the PCD is as follows: 1) Measure the distance ‘S’ between two adjacent studs from the centre of each hole.

## What is the pitch circle?

an imaginary circle within the profiles of the teeth of a gear, such that it rotates against a similar circle rotating at the same rate on a meshing gear.

## What is a pitch diameter?

Pitch diameter is perhaps the most important element with regards to whether two parts will screw together. Pitch diameter is the distance from the pitchline to the corresponding pitchline located 180 degrees around. All threads have a pitch diameter whether they are a straight or tapered thread.