1. Bar tacking for various kinds of clothing such as suits, jeans and work cloths, also applicable to tacking( for end) eye-let buttonhole tacking.Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
2. Adjust the tack leagth and tack width easily, automatic thread trimmer, automatic presser foot lifting, concentrated lubricating.
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The Tapered Roller Bearing belongs to the separation type bearing, and the inner and outer rings of the bearing have a conical raceway. This type of bearing is divided into single, double and four row Tapered Roller bearing according to the number of the roller. The single row tapered Roller Bearing can bear the radial load and the single direction axial load. When a bearing is subjected to a radial load, an axial force will be generated, so another bearing that can withstand the axial force of the reverse direction is needed to balance it.
The basic dimensions of the ZWZ tapered roller bearings are listed in the size data sheet.
Single row tapered roller bearing:
Inner diameter range: 20mm ~ 1270mm
Size range of outer diameter: 40mm ~ 1465mm
Width range: 15mm to 240mm
Double row tapered roller bearing:
Inner diameter range: 38mm ~ 1560mm
Size range of outer diameter: 70mm ~ 1800mm
Width range: 50mm to 460mm
Four row tapered roller bearings:
Inner diameter range: 130mm ~ 1600mm
Size range of outer diameter: 200mm ~ 2000mm
Width range: 150mm to 1150mm
ZWZ metric conical roller bearings have general tolerance, and also provide P6X, P6, P5, P4, P2 tolerance products, all in accordance with the GB307.1.
ZWZ taper roller bearings have general tolerance, and they can also provide CL2, CL3, CL0 and CL00 tolerance products as required.
ZWZ single row tapered roller bearings only have clearance after installation, and the bearings in the opposite direction can be adjusted to determine.
The tapered roller bearings are usually stamped by steel plate and basket cage, but when the size is large, the mainstay of the solid support is also used.
1. when the bearing outer diameter of D is less than or equal to 650mm, the stamping steel cage, the cage rear code are not marked
2. when the outer diameter of the bearing is D>650mm, the steel solid pillar holder is used, and the post code of the cage is not marked.
Equivalent dynamic load
P=Fr KN] when Fa/Fr is less than or equal to e
P=0.4Fr +YFa [KN] when Fa/Fr>e
When a single row tapered roller bearing is used in pairs (the basic size is different), the additional axial force caused by radial load must be included when calculating the equivalent dynamic load of the bearing. The additional axial force S of a single row tapered roller bearing can be approximated by a press type calculation: S= Fr/2Y
Equivalent static load
Single row tapered roller bearing
P0=0.5Fr +Y0Fa KN]
If P0<Fr takes P0=Fr
Double and four row tapered roller bearings
P=0Fr +Y1Fa [KN] when Fa/Fr is less than or equal to e
P=0.67Fr +Y2Fa [KN] when Fa/Fr>e
A: internal structure changes
B: increased contact angle
X: international standards are used in dimensions
CD: double outer ring with oil holes or oil grooves.
TD: double rings with taper hole.
Taper Roller Bearing Sizes,Taper Roller Bearing,Small Tapered Roller Bearings,Taper Roller Bearing Dimensions
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