2013年8月20日星期二

Single row angular contact ball bearings and double row angular contact ball bearings

Single row angular contact ball bearings and double row angular contact ball bearing Abstract: ultra-high-speed milling Ways What fuse, its role is to what? pro / e part accuracy modify Haoke welding stress relieving equipment in natural gas project on the application of expert systems MCE Cyclone content selection CNC machining high precision machining techniques and tools shank system selection three good technology extrusion die Eight new technologies upcoming CNC servo system performance tools to explore Taiwan Factory call up profits will ascribed CNC milling technology perspective advanced measurement technology and new trends in the correct milling tooth spur gear to ensure proper planing point Zatan class machine - fast curing rubber broaching Introduction Technical R1-00 automatic feeding tipping rules CNC EDM wire cutting in plastic processing application method and machining centers CNC Troubleshooting Q digital oscilloscope using a mold manufacturing high-speed cutting tools contact bearing load bearing system can be configured to represent this installation code contact ball bearings ball retainer inner integral outer radial load axial load Axial load speed work stably single contact ball bearings can withstand an axial direction load bearing radial load rolling loads radial load is not the same radial plane generates an internal axial force component must be installed in pairs using a ..

Angular contact ball bearings 70000 type, and from the outer ring, inner ring, balls, cage. Can support radial load and axial load can also be subject to pure axial load, at higher speeds and stable work. Single row angular contact ball bearings can withstand axial load in one direction. Such bearings under pure radial load, due to the rolling load line and not in the same line of action of the radial load radial plane, an internal axial component, it must be installed in pairs.

A single row angular contact ball bearings Single row angular contact ball bearings have the following structure:

(1) Separate angular contact ball bearings

This bearing the code S70000, its outer ring raceway side did not lock port, with the inner ring, cage, Gang ball component separation, which can be installed separately. Such are mostly less than 10mm diameter miniature bearings for gyro rotors, micro-motors for balancing, noise, vibration, stability requirements are high device.

(2) non-separable angular contact ball bearings

These bearings have a lock ring channel mouth, so the two can not be separated circles. At a contact angle is divided into three types:

① contact angle α = 40 °, applicable to withstand large axial load;

② contact angle α = 25 °, used for precision spindle bearings;

③ contact angle α = 15 °, and more for larger sized precision bearings.

(3) arranged in pairs of angular contact ball bearings

Arranged in pairs of angular contact ball bearings for both radial and axial load settings, they can withstand pure radial load and axial load in either direction. Such bearings by the manufacturer according to certain pre-load requirements, matching pairs, available to users. When the bearing is installed on the machine after fastening, completely eliminating the bearing clearance, and to outline the ball is preload rings and state, thus increasing the combined bearing steel.

Arranged in pairs of angular contact ball bearings, there are three different configurations Type:

① back to back configuration, the post code for the DB (eg 70000/DB), this configuration of the steel better withstand the overturning moment of the performance is good, the bearings can withstand axial load;

② face configuration, the post code for the DF (eg 70000/DF), this configuration of the rigidity and the ability to withstand the overturning moment as DB configuration form, bearings can withstand axial load;

③ series configuration, post code for DT (eg 70000/DT), this configuration can also be supported in the same place in series of three or more bearings, but can only bear axial load in one direction. Generally, to balance and limit the axial displacement, the other bearing at the other direction to be installed to withstand the axial load bearing.

In addition, there is a pair for any single row angular contact ball bearings. This bearing special processing, can be two back to back, face to face or two tandem two other arbitrary combinations, paired combination of axial clearance can be selected, post code CA represents a smaller axial clearance, CB represents the axial clearance is moderate, CC represents a larger axial clearance.

Universal paired bearings can also be configured to use requirements have preloaded bearings, and after-code GA, GB, GC representation. GA represents paired with smaller preloaded; GB represents paired with moderate preloaded; GC indicates a greater paired preloaded.

2 double row angular contact ball bearings

Double row angular contact ball bearings can be characterized by both radial and axial load of joint load, limiting both the axis of the axial displacement. Compared with the two-way thrust ball bearings, this bearing high speed limit, the contact angle of 32 °, rigid, and can withstand the overturning moment, widely used in cars in the front wheel hub (some models also use the same size double row tapered roller bearings).

Double row angular contact ball bearing structure has four variants:

(1) A type of bearing outside diameter less than or equal to 90mm standard design. Non-loaded ball gap, so they can withstand the equivalent of two-way axial load. Using lightweight glass fiber reinforced nylon 66 cage, bearing temperature rise is small.

(2) A type of bearing outside diameter greater than 90mm standard design. Side of the ball gap, with a pressed steel cage or solid brass cage.

(3) E-type structure is enhanced, the side with filling slots that can hold more of the ball, so the higher carrying capacity.

(4) sides with a dust cover type and sides with a ring-type A-type and E-type design designed double row angular contact ball bearings can be on both sides with a dust cover (non-contact) or seal (contact ). Sealed bearings are filled with rust inside lithium grease, operating temperature is generally -30 ~ +110 ℃. No further lubrication during use, should not be heated before installation should not be cleaned.

Double row angular contact ball bearing installation should pay attention, although bearings can withstand axial load, but if there is one side of the gap when the ball should be careful not to let the main axial load through the notched side of the gutter.

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