"Common Bearing Suffix Codes" (code appended to the bearing found

The "Common Bearing Suffix Codes" manual is a table summarizing the meaning of the numbers and letters at the end of the bearings, which tells specific features. The categories, advantages, disadvantages and disadvantages can be divided according to the information in the image:

1.Clearance (intrinsic distance)

Tell me the gap between the bearing and the running rail.

C2: Less-than-normal (Normal se kam clearance)

C3: slightly more than normal distance, which is the most commonly used version (Normal se zyada clearance / Most Common)

C4 / C5: High and Extra High Clearance Distance (High / Extra High Clearance)

Advantages:

C3, C4, C5: Suitable for high-speed or high-heat applications, because when the bearing heats up, the metal expands. Having an extended range prevents the bearing from jamming.

C2: Fits tasks that require very high accuracy and rotate in low turns. No swing required.

Disadvantages / disadvantages:

If C3 or higher is optionally used, in machines that operate normal temperatures and low cycles, the bearings are too loose, causing noise, high vibration, and break more quickly.

If C2 is opted for in high cycle or high heat work, the bearing will expand until it becomes too tight (jammed) and immediately burns damaged.

2.Seals / Shields (Lid / Dust Seal)

Z / ZZ (or 2Z): Steel Lid (One Side / Two Side)

RS / 2RS: Rubber Seal (One Side / Two Side)

Advantages:

Steel Cap (Z / ZZ): Good protection against coarse dust, very low friction, high cycle speed, and better heat resistance than rubber seals.

Rubber Seal (RS / 2RS): Excellent protection against water, moisture and small dust and keeps grease inside from flowing out.

Disadvantages / disadvantages:

Steel Lid (Z / ZZ): Waterproof, moisture or liquid can easily seep in until rusting or grease is cleared.

Rubber Seal (RS / 2RS): The rubber seal is in direct contact with the core causing high friction, is not suitable for tasks that require extremely high cycle speed, and easily deteriorates (frame / break) when coming across certain chemical oils or high heat.

3. Cage Type (Type of Bearing Nest)

Material used to hold and align the spacing of bearing pellets.

M: Brass Nest (Brass Cage)

J: Steel Cage

TN / TN9: Nylon / Plastic Nest (Nylon Cage)

Advantages:

Iron Nest (J): It is standard, strong, durable, low cost, good general heat resistance.

Brass Nest (M): Very strong, excellent impact, vibration and chemical resistance, suitable for heavy duty.

Nylon Nest (TN / TN9): Lightweight, very quiet, low friction, does not require high lubrication at the start.

Disadvantages / disadvantages:

Iron Nest (J): weighs more than nylon, and if lubricant is lacking, wear and noise is easy.

Brass Nest (M): The price is the highest, and weighs heavily, not suited to tasks that require high mobility on a small scale.

Nylon Nest (TN / TN9): Not resistant to high heat (often limited to temperatures up to 120 ° C) and not resistant to severe chemicals or certain types of oils.

4.Precision Class (Precision Level)

P0: Normal Precision (Normal Precision)

P6 - > P5 - > P4: Sorted Precision from High - > Very High - > Ultra High

Advantages:

P5 / P4 (High Grade): Very Low Deviation, Still Rotation, Smoothing, Fits Machines Needing High Resolution, such as CNC Machines or Medical Equipment

P0 / P6: Easy to buy, low cost, suitable for general work

Disadvantages / disadvantages:

High Grade (P5 / P4): Very high price, and susceptible to contaminants or unfair installations (if the shaft shaft or blouse is only slightly crooked, high grade bearings will break immediately)

5.Special Features & 6.Heat Stabilization (Special Feature & Heat Resistant)

NR: With Groove and Lock Ring (Snap Ring) / N: With Groove Only

K: Hole in the taper (Requires resizing casing)

W33: There is a lubricating groove on the outer ring.

S0 / S1 / S2: Through the process of treatment to be highly heat resistant, with the structure unchanged.

Advantages:

NR / N: Simplifies locking of bearings to shaft tops, saves locking system design space.

W33: Allows thorough distribution of oil or grease into the ball bearing in heavy duty.

S0 / S1 / S2: Long-lasting high temperature operation where the bearing does not expand until deformed.

Disadvantages / disadvantages:

These specially coded bearings will have a higher price than usual and a specific product (Specific Workpiece). If damaged, it may be more difficult to find replacement parts in the general market than normal treatment standard models.