JinHang Precision Bearing Co.,Limited |
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Food Extrude Use Twin Screw Extrudes Bearing T7AR30135A M7CT30135A 30x135x339mm
Tandem bearing old code | Tandem bearing new code | Basic size unit(mm) | Basic load rating Unit (KN) | weight | material | |||
Inner dia mm | Outer dia mm | Height mm | Cr | Cor | kg | |||
T7AR30135A | M7CT30135A | 30 | 135 | 339 | 2036 | 9605 | 30.7 | Steel chrome |
Tandem bearing 7 rows bearing catalogue
基本尺寸 | 基本额定负荷 | 重量 | 原代号 | 现代号 | |||
Bearings | Basic load ratings | Weight | Old_spec | Designations | |||
动 | 静 | ||||||
d | D | H | dyc_Cr | stc_Cor | |||
mm | KN | kg | |||||
18 | 80 | 200 | 690 | 2771 | 6.83 | T7AR1880 | M7CT1880 |
18 | 100 | 266 | 1351 | 5733 | 13.03 | T7AR18100 | M7CT18100 |
18 | 100 | 306 | 1351 | 5733 | 7.44 | T7AR18100A | M7CT18100A |
22 | 64 | 180 | 362 | 1471 | 3.25 | T7AR2264 | M7CT2264 |
23 | 85 | 227 | 860 | 4020 | 8.11 | T7AR2385A | M7CT2385A |
25 | 105 | 273 | 1265 | 5821 | 13.7 | T7AR25105 | M7CT25105 |
25 | 120 | 336 | 1668 | 7250 | 21.4 | T7AR25120A | M7CT25120A |
30 | 135 | 339 | 2036 | 9605 | 30.7 | T7AR30135A | M7CT30135A |
Tandem bearings offer an optimum solution wherever the following
requirements apply:
■ small radial design envelope
■ high axial forces
■ long operating life
■ low frictional energy.
Tandem bearings have proven effective principally in gearboxes for
single and twin screw extruders in the rubber and plastics
industry.
Other possible applications include:
■ deep hole drilling equipment
■ friction welding machines.
Plastic extruder machine
Application of tandem bearings
When using tandem bearings, the following recommendations should be
adhered to:
1. Preload: 1% of the dynamic basic load rating. The dynamic basic
load rating of each tandem bearing . Figures not listed will be
provided by out institute on request.
2. Radial guidance: full complement cylindrical roller bearings or
needle roller bearings can be used.
3. Eliminate tilting: the supporting parts must be machined to
eliminate any tilting.
4. Mounting tolerances: recommended the following mounting
tolerances: shaft f6 and housing bore F7.
5. Lubrication: tandem bearings must always be lubricated by oil
circulation.
JinHang Precision bearing offer Tandem thrust
cylindrical roller Feed food extruder multi-stage bearings
T7AR25120A M7CT25120A 25x120x336mm bearings have the
characteristics of small radial cross-sectional size, compact
structure, large axial load capacity, uniform load of each row of
rollers, wear resistance, low vibration noise and long life. They
are parallel twin screw extruders. Ideal screw spindle bearing.
The tandem bearing including two, three, four, five, six, seven or
eight rows of tandem bearings in the company's sample according to
the screw center distance, space and load size. The company also
accepts tandem bearings of sizes and structures other than the
sample.
Tandem Bearings Type
1. Basic Type: The bearing adopts elastic spacer to connect the
shaft washer,housing washer, roller and cage assembly. The
components of this Thrust Bearings are demountable. The user should
assemble or dismount the bearing meticulously according to our
guide book.
2. Shaft Type: The bearing is made by penetrating an axis through
the inner bore of basic type bearing and fastening the bearing to
the axis by locking collar/snap ring. The components of this type
bearing are inseparable. Shaft type tandem bearing is variational
structure of basic type.
3. Multi-stage cylindrical roller thrust bearing (sleeve type)
locking collar is made by covering a sleeve to the external of the
basic type multi-stage cylindrical roller thrust bearing. It is
also inseparable,and is assembled and disassembled as a whole.
Extruders are used to produce long continuous products such as tubing, tire treads, and wire coverings. They are also used to produce various profiles that can later be cut to length. Multiroll calenders are used to make wide sheeting. In transfer and injection molds, the…
There are two major types of extruders; single and twin screw
(co-rotating and counter rotating). These come with a wide range of
screw diameters (D), lengths (L), and designs. The single screw and
co-rotating twin screw are inherently axially open-channel
extruders. They can be regarded as drag flow pumps. Their output or
degree of fill (if not running at maximum volumetric rate) can be
impacted by the pressure flow within the extruder. Closely
intermeshing counter-rotating twin screw extruders form closed
channels in the intermeshing region. Their output is less
vulnerable to the pressure flow within the extruder. As such, they
can be considered as positive displacement pumps.
Food extruders utilize thermal and mechanical energy. Understanding
energy consumption and input requirements is very important for
improving performance and economical system design. Water is a
common ingredient in almost all food extrusion formulations. It
impacts the characteristics of the ingredients, melting behavior,
and formed dough rheology. Part of this water can be sometimes
applied in the form of steam, thus impacting the total extruder
energy input, extruder output, system design, and operating
conditions. Both forms of water can be directly metered into the
extruder and/or into a preconditioning mixing device. The steam
incorporation option can have a significant impact on the extruder
selection, design, and performance, as well as on the product
characteristics.
Food Extruders
Longitudinal section of a screw extruder of thermoplastic polymers.
Plastic pellets are fed from a hopper into the barrel of the
extruder, where the pellets are gradually melted by mechanical
energy generated by a turning screw and by heaters arranged along
the barrel. The molten polymer is forced through a die, which
shapes the extrudate into products such as the examples shown.
Extruders are used to produce long continuous products such as tubing, tire treads, and wire coverings. They are also used to produce various profiles that can later be cut to length. Multiroll calenders are used to make wide sheeting.