SKF deep groove ball bearing, miniature, iron cap seal, 628-2Z

**Product Introduction Overview** Deep groove ball bearings are the most common type of rolling bearing. A basic deep groove ball bearing consists of an outer ring, an inner ring, a set of balls, and a cage. Its simple structure and ease of use make it the most widely produced and applied type of bearing. Deep groove ball bearings are non-separable bearings, with a simple structure and extremely common use. Besides the basic type, there are various variations, such as: deep groove ball bearings with dust covers, deep groove ball bearings with rubber seals, deep groove ball bearings with retaining grooves, and full complement deep groove ball bearings with large load capacity and filling notches. Deep groove ball bearings primarily bear radial loads, but can also simultaneously bear radial and axial loads. They are suitable for use under high-speed operating conditions. When subjected to only radial load, the contact angle is zero. When a deep groove ball bearing has a large radial clearance, it exhibits the performance of an angular contact bearing and can withstand larger axial loads. Deep groove ball bearings have a very low coefficient of friction and a high limiting speed, but are not suitable for heavy loads. Selecting a larger radial clearance increases the axial load capacity; the contact angle is zero when subjected to pure radial force. When axial force is applied, the contact angle is greater than zero. Deep groove ball bearings are widely used in many fields such as automobiles, home appliances, machine tools, motors, water pumps, agricultural machinery, and textile machinery.

Technical Specifications

Data Calculation

Basic Rated Dynamic Load	C	3.9	kN
Basic Rated Static Load	C<sub>0</sub>	1.6	kN
Fatigue Load Limit	P<sub>u</sub>	0.071	kN
Reference Speed		63000	r/min
Limiting Speed		32000	r/min
Calculation Coefficient	k<sub>r</sub>	0.025
Calculation Coefficient	f<sub>0</sub>	13

Mass

Bearing Quality

0.018

kg

Product Details

Dust Cover: Bearings with dust covers are mainly used in applications where the inner ring rotates. The dust cover is installed in the outer ring and does not contact the inner ring, but a very small gap is formed between them. The dust cover is made of stamped steel. For stainless steel bearings, stainless steel dust covers are used. SKF offers dust covers of different designs depending on the bearing design, series, and size. As follows: Dust covers with the suffix Z have an extension at the inner diameter, forming a narrow gap with the inner ring shoulder (Fig. a); Some dust covers do not have an extension (Fig. b); On some stainless steel deep groove ball bearings, the inner diameter of the Z-type dust cover can extend into the inner ring groove (Fig. c); Dust covers with the suffix ZS are only used for stainless steel bearings. These dust covers are secured in the outer ring by a retaining ring (Fig. d) and may extend into the inner ring groove.

Notices

Besides their superior quality, SKF deep groove ball bearings are also very precision parts. Even though they are high-performance SKF deep groove ball bearings, improper use can not only fail to achieve the expected performance but also easily damage them. Everyone is certainly aware of the importance of lubrication.

Besides lubrication, what other aspects should be considered when using SKF deep groove ball bearings? I. Careful handling during installation is essential. Forceful impact is prohibited. Do not directly strike the SKF deep groove ball bearing with a hammer, and do not transmit pressure through the rolling elements. II.

Use appropriate and accurate installation tools. Use specialized tools whenever possible, and avoid using cloths or short fibers. III. Keep the SKF deep groove ball bearing and its surrounding environment as clean as possible. SKF deep groove ball bearings generally use sodium-based grease.

Even microscopic dust invisible to the naked eye entering the SKF deep groove ball bearing will increase wear, vibration, and noise. Fourth, prevent rust on SKF deep groove ball bearings.

When handling SKF deep groove ball bearings directly by hand, thoroughly wash away sweat and apply high-quality mineral oil before handling. Pay special attention to rust prevention during the rainy season and summer.

Under certain special operating conditions, SKF deep groove ball bearings can achieve a longer lifespan than traditionally calculated, especially under light loads. The mechanism and influencing factors of the labyrinth seal in SKF deep groove ball bearing housings are analyzed.

These special operating conditions involve the rolling surfaces (tracks and rolling elements) being effectively separated by a lubricating oil film, limiting surface damage that may be caused by contaminants. In fact, under ideal conditions, a permanent lifespan for SKF deep groove ball bearings is possible.

Technical Specifications

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Specification	Value
Brand	SKF
Category	Deep Groove Ball Bearings
Sealed dust cover	Iron cover seal
With flange	No
Inner diameter (mm)	8
Outer diameter (mm)	24

Plain language sourcing guide for SKF deep groove ball bearing, miniature, iron cap seal, 628-2Z

Start with the full model name. Check the brand name. Check the part number. Check the code on the old unit. These small checks help you avoid a wrong order.

Take one clear photo of the front label. Take one photo of the side label. If the part has a cable, plug, port, seal, coil, or screen, take a photo of that area too.

Tell us the quantity you need. Tell us your country. Tell us the date when the plant needs the part. We can then check stock, lead time, safe packing, and the best shipping plan.

If the exact model is no longer made, do not guess. Send the old model and the use case. LEHIY can compare close options and explain which choice is safer for repair work.

Use simple order notes. Write the model in one line. Write the quantity in one line. Write the delivery country in one line. This helps our team reply faster.

Check the old part before removal. Look at the label. Look at the connector. Look at the mounting size. Look at the voltage or pressure rating if it is shown.

Do not rely on a short nickname for a part. Many industrial items have close versions. A small suffix can change the plug, output, range, or software setting.

Ask for a stock check if the plant is stopped. Ask for a lead time if the order is planned. Ask for packing photos if the part is fragile or heavy.

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For urgent service, keep the message simple. One model, one quantity, one photo, and one delivery target are enough for a fast first check.