THE WHEELS

Characterìstics

The wheels have four important characteristics, the hardness, the measure, the profile and the center:

The hardness of the wheels is expressed by the symbol "A". The higher the hardness, the more resistance the wheel has to wear, but it slides more and absorbs fewer shocks. You can find wheels that range from 76A to 95A. In general, the wheels from 76A to 82A are used to learn and for fitness routes, from 82A to 84A for urban / interurban routes and to play hockey, and the higher harnesses are used in aggressive skating, to the ramps.

The measurement of the wheels goes from 43 mm to 125 mm in diameter. The bigger they are, the more speed we will take, but the more complicated it will be to maneuver and accelerate. To the ramps, the wheels are usually small (<65mm). To play hockey, they are usually medium (72-76 mm), allowing high speeds without obstructing acceleration and maneuverability. And by speed courses, the largest possible is used.

The profile is the shape of the wheel with respect to its longitudinal axis. This profile can be wide or narrow. The width gives more stability and more grip to the corners, but the speed is lower (perfect for urban skating). The strait is less stable but, as the resistance is less, the speed is higher (perfect for speed courses).

The center is the material that maintains the contact between the external part of the wheel (polyurethane, normally) and the bearing. It basically has the same function as the spokes of a bicycle wheel. The centers can be opened (pierced), closed, or, simply, they cannot exist (how it happens with aggressive skates).

Maintenance: Swap the wheels

The wear of the wheels cannot be avoided, but it can be minimized. One way to do this is to exchange the position of the wheels regularly. There are many different techniques and it also depends on the number of wheels (3, 4, 5) of the skate. It may also be that we need more than one key.

4 wheels: the front and rear wheels are the most used, and the middle wheels, the least. Therefore, those from the middle to the ends and vice versa are passed.
They also exchange skate, to spend both sides of the wheel.

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THE BEARINGS AND THE PADS.

The bearings also wear out over time, due to dust, moisture, shock and vibration. So, in a poorly maintained bearing dirt builds up that interferes with the rotating movement of your balls. Periodic maintenance is essential to ensure a long and efficient bearing life. The maintenance process happens to remove the bearings from the wheels, clean them and lubricate them. You only need time and follow a series of steps that you will find below.

This guide describes the types of bearings that are available and a series of simple and effective techniques.

There are two types of bearings: standard ball bearings, and micro bearings (needle bearings).
The speed difference between the two is not huge, but the price difference does!

On the other hand, most wheels are made for standard bearings.
 
If you want to use micro bearings you have to buy another adapter. Therefore, here we will just look at the normal bearings.

Type of bearings and classification

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The ABEC (Annular Bearing Engineer Council) standard is an American standard that measures the degree of tolerance of bearings. It is denoted by an odd number and, the lower, the lower the quality of the bearing. Thus, ABEC 3 are of lower quality than ABEC 5, and lower than ABEC 7 and ABEC 9.

The low quality wheels are assembled with ABEC1, the wheels mounted with ABEC3 or ABEC5 bearings are of intermediate quality, and the high quality wheels are usually equipped with ABEC 7 or 9 pads.

The ABEC 3 are usually used in situations of shock (jumps, aggressive skating ...), since they are more resistant but slower, the ABEC 5 is a good compromise, but they can break faster and finally the ABEC 7 or 9 They are mainly used for their speed. In recent years the problem of resistance has been solved.

The ABEC standard was created by the American Bearing Manufac- tures Association (ABMA) and is accepted by the American National Standards Institute (ANSI).

It is controversial because it takes into account only the manufacture and precision of the ball, and ignores other important factors, such as manufacturing material, etc.

The use of the ABEC standard is the result of a strategic choice made by Asian companies that did not always have the ISO standard. In this way, it forced all the manufacturers of the world to align to allow a better comparison between these products, and avoid using the most draconian ISO standard.

Following the correspondence between the ABEC and ISO standards

A.B.E.C. STANDARD I.S.O. STANDARD
A.B.E.C. 1 I.S.O. 0
A.B.E.C. 3 I.S.O. 6
A.B.E.C. 5 I.S.O. 5
A.B.E.C. 7 I.S.O. 4
A.B.E.C. 9 I.S.O. 2



The bearings used for skating are usually type 608 and 688, with rare exceptions. There are some 800-27 bearings. The 608 type pad has a hole diameter of 8mm and 6mm between the outer walls of two cylinders. Next the classification of the bearings of types 608 with the meaning of the annotations that accompany it on the covers of the pads.

NAMES CHARACTERÍSTICS EFFECTS
608 AB BASIC BEARINGS
608 Z ONE STEEL FACE PROTECTION AGAINST DUST ON ONE SIDE (NOT WATERPROOF)
608 ZZ BOTH SIDES OF STEEL PROTECTION AGAINST DUST ON BOTH SIDES (NOT WATERPROOF)
608 D ONE SIDE OF ELASTOMER PROTECTION AGAINST DUST AND  MOISTURE ON ONE SIDE.
608 DD BOTH SIDE OF ELASTOMER PROTECTION AGAINST DUST AND M OISTURE ON BOTH SIDES.
608 BRS BOARD WITHOUT CONTACT ALMOSR TIGHT
608 RS SEALID SEAL SEALED AND INTERCHANGEABLE
608 RZ "LABYRINTH" SEAL LOW FRICTION SEAL INTERCHANGEABLE
608 IURS TWO-LIP SEAL VERY SEALED.

ILQ is not a standard such as ABEC. This is a brand, which is why it is not an official industrial measurement for professional bearings. Wincam classifies its bearings according to the ILQ scale (Qualified online / English: InlineQualified).
The ILQ bearings have 6 balls while ABEC has 7.
Which is better, an ABEC or an ILQ? Objectively only the engineers of the ILQ can know that, the rest we have to believe (or not) the publicity of the ILQ.

Maintenance: Remove the bearings from the rollers

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Maintenance: Disassemble the bearings.

To disassemble the bearing, with a needle, exert pressure on the flange that holds the lid and remove the lid (how to describe the photographs).

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Here is the video tutorial: INS TUTO YOUTUBE

Maintenance: Clean the bearings

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Maintenance: Uses bearings in conditions.

Do not hesitate to change the bearings when they do not give for more!!!

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We recommend not skating with broken bearings, too rusty or with knocks. Apart from going slower, you increase the risk of them breaking down and, therefore, you may have a fall. Having to abandon a route due to poorly maintained bearings is a pity. So, remember, if your bearings are not in good condition, throw them away!

THE SCREWS

When you remove your wheels from the guide, you have to go with plenty of time with the screws (and the guide) to avoid:

• That the head of the screw is passed:

It occurs when the screw loses the original shape of the head, either an Allen, Torch or hexagonal screw. Normally, this problem occurs due to improper use of the correct tool or, directly, using the wrong tool.

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• That the thread of the screw passes to you:

It occurs when the outer diameter of the thread area decreases appreciably. For example, if we put the twisted screw and force it.

• That you miss the thread of the guide:

It occurs when the diameter of the thread area of the guide increases and, therefore, the thread of the screw is not fixed. This is the worst case, since it is not as simple as changing the screw. It is likely that the guide will have to be changed.

THE BOOTS

This part of the skate does not require much maintenance, you must have to check regularly that it is in good condition and that it takes the foot well (check the condition of the laces and the inside of the boot).
There are skates that allow to separate the boot from the skate. In this case, if necessary, they can be washed with soap and water. You consult the manual that sold with the skates. If you wash them with soap and water, let them dry outdoors. Do not use a stove, especially in the case of thermos formable boots.

Summarizing:
For your safety, make sure you have the material in good condition so that it lasts as long as possible and you can enjoy the skating without problems.