• Flanged Shaft Coupling

FCL-280

Flexible Flanged Shaft Coupling

Dimension Drawing

FCLFlexible Flanged Shaft Coupling寸法図

FCLFlexible Flanged Shaft Coupling寸法図

Specs/CAD

Unit : mm

Part Number A Prepared hole diameter L C1 C2 B F1 F2 n
(item)
a M t Bolt
Draft
Coupling bolt
Part Number
Price
(USD)
CAD Add to Cart Additional Modification
FCL-280 280 30 100 140 140 200 28 40 8 28 57 4 116 F6 - CAD RFQ

Part Number Max. Bore Diameter
(mm)
Max. torque (N・m) Max. Rotational Frequency
(min-1
Moment of Inertia*1
(kg・m2
Max. Lateral Misalignment
(mm)
Max. Angular Misalignment
(°)
Max. Axial Misalignment
(mm)
Mass*1
(kg)
D1 D2
FCL-280 80 80 1500 2300 3.3×10-1 0.3 1/6 ±2.8 38.5

*1: These are values with max. bore diameter.

Material/Finish

FCL FCLS
Joint
Main Unit
FC200 or more S25C or more
Nut Equivalent to SS400
Trivalent Chromate Treatment
Equivalent to SS400
Trivalent Chromate Treatment
Spring Lock
Washers
SWRH62
Trivalent Chromate Treatment
SWRH62
Trivalent Chromate Treatment
Bushing NBR
B (12) -j1a1〔HS (JIS A)=70〕
NBR
B (12) -j1a1〔HS (JIS A)=70〕
Washer Equivalent to SS400
Trivalent Chromate Treatment or
Electroless Nickel Plating
Equivalent to SS400
Trivalent Chromate Treatment or
Electroless Nickel Plating
Bolt Equivalent to SS400
Trivalent Chromate Treatment
Equivalent to SS400
Trivalent Chromate Treatment

Characteristics

  • The most popular flexible shaft coupling in Japan that is compliant with JIS B 1452-1991 "Flexible Flanged Shaft Couplings".
  • Simple structure comprised of a flange and coupling bolts. Easy-to-mount.
  • Bushings can be replaced just by removing coupling bolts. This makes maintenance and service easy.
  • While it absorbs misalignment such as eccentricity and argument, it prevents noise by absorbing torsional vibration. It will not transmit thrust load, either.
  • Two types are available: Cast Iron FCL and Carbon Steel FCLS.

Product Standard

The product standard of the flexible flanged shaft couplings is compliant with JIS B 1452-1991 "Flexible Flanged Shaft Couplings".

Allowable value of the run-out of the joint outer diameter to the shaft hole center, and that of the joint surface near the outer diameter

0.03mm

Allowance of the bolt hole pitch circle diameter and the bushing insertion hole pitch circle diameter, allowance of the pitch, and the run-out tolerance to the shaft bore center

Unit : mm

Pitch Circle Diameter Pitch Circle Diameter and
Pitch Allowance
Pitch Circle Diameter
Run-out Tolerance
60 / 67 / 75 ±0.16 0.12
85 / 100 / 115 / 132 / 145 ±0.20 0.14
170 / 180 / 200 / 236 ±0.26 0.18
260 / 300 / 355 / 450 / 530 ±0.32 0.22
600 / 580 / 670 ±0.40 0.28

Dimensional allowance of each part of the joint

Unit : mm

Joint Outside Diameter A - g7
Bolt Hole and Bolt a H7 g7
Washer Inside Diameter*1 a - 0~+0.4
Bushing Inside Diameter, Washer Inside Diameter
and Bolt Bushing Insertion Area Diameter a1
0~+0.4 e9
Bushing Insertion Hole M H8 -
Bushing Outside Diameter p - -0.4~0
Bolt Bushing Insertion Area Length m - k12

*1: For those with the standard dimensions of 8, it is 0~+0.2.
Each symbol is identical to that shown in the Dimension/Performance table.

Performance of the Bushing

Characteristics item NBR (Nitrile rubber)
Machine oil Excellent
Gasoline Excellent
Benzine Impossible
Ketone Impossible
Alcohol Excellent
Acid resistance Weak acid Good
Strong acid OK
Impact resilience Good
Abrasion resistance Excellent
Aging Resistance Excellent
Tensile strength Excellent
Heat resistance
(max. operating temperature, regular use)
90℃
Cold resistance
(min. operating temperature, regular use)
-20℃

Alignment Adjustment

  1. Although the flexible flanged shaft coupling permits misalignment and transmits torque, if the misalignment exceeds the allowable value, vibration may occur or the life may be rapidly shortened. Be sure to perform alignment adjustment.
  2. Shaft center misalignment includes eccentricity (parallel error of both shaft centers), argument (angle error of both shaft centers), and end-play (shaft direction movement of the shaft). Adjust the shaft alignment so that it will not exceed the allowable value listed in the Dimension/Performance table in this catalog.
  3. The allowable values of the misalignment listed in the Dimension/Performance table are for the case where any one of eccentricity, argument, and end-play occurs independently. Mixing of two or more misalignment causes each of the allowable values to be reduced to half.
  4. Misalignment may occur not only in assembling into the device but also due to vibration, thermal expansion, and shaft bearing abrasion during operation. Therefore, it is recommended to keep the misalignment one third of the allowable value or less.

Eccentricity, Parallel Offset Misalignment

FCL/FCL-FL/FCLS/FCLS-FL/FCL-BOLTSET/FCL-BUSH_CFlexible Flanged Shaft Coupling

Argument, Angular Misalignment

FCL/FCL-FL/FCLS/FCLS-FL/FCL-BOLTSET/FCL-BUSH_CFlexible Flanged Shaft Coupling

End-Play

FCL/FCL-FL/FCLS/FCLS-FL/FCL-BOLTSET/FCL-BUSH_CFlexible Flanged Shaft Coupling


Reference Material

Surface pressure of the bushing and the bending stress of the bolt

Joint Outside Diameter
A
(mm)
Rated Torque
(N•m)
Pitch Circle
Diameter
B
(mm)
Number of
Bolts
n
(pc)
Load per
Piece*1
(N)
Area in Bushing
q×a1
(mm2)
Inner Periphery Pressure
P1
(MPa)
Bushing
Width
q
(mm)
Clearance
t
(mm)
Arm
t+q/2
(mm)
Bending
Moment
(N・m)
Bolt
Diameter
a
(mm)
Section Modulus
πa3/32
(mm3)
Bending Stress
σ
(MPa)
90 4.9 60 4 82 14×09 0.65 14 3 10 0.82 8 50.3 16.2
100 9.8 67 4 146 16×12 0.76 16 3 11 1.61 10 98.2 16.4
112 15.7 75 4 209 16×12 1.09 16 3 11 2.30 10 98.2 23.4
125 24.5 85 4 288 18×16 1.00 18 3 12 3.46 14 269.4 12.8
140 49 100 6 327 18×16 1.13 18 3 12 3.92 14 269.4 14.6
160 110 115 8 478 18×16 1.66 18 3 12 5.74 14 269.4 21.3
180 157 132 8 595 18×16 2.06 18 3 12 7.14 14 269.4 26.5
200 245 145 8 845 22.4×22.4 1.68 22.4 4 15.2 12.8 20 785.4 16.4
224 392 170 8 1150 22.4×22.4 2.30 22.4 4 15.2 17.5 20 785.4 22.3
250 618 180 8 1720 28×28 2.19 28 4 18 30.9 25 1535 20.1
280 980 200 8 2450 40×32 1.94 40 4 24 58.8 28 2155 27.3
315 1570 236 10 2660 40×32 2.11 40 4 24 63.9 28 2155 29.6
355 2450 260 8 4710 56×40 2.10 56 5 33 155 35.5 4390 35.4
400 3920 300 10 5230 56×40 2.33 56 5 33 172 35.5 4390 39.3
450 6180 355 12 5800 56×40 2.59 56 5 33 191 35.5 4390 43.6
560 9800 450 14 6220 56×40 2.78 56 5 33 205 35.5 4390 46.8
630 15700 530 18 6580 56×40 2.94 56 5 33 217 35.5 4390 49.5
710B 24500 600 24 6810 56×40 3.04 56 5 33 225 35.5 4390 51.3
711B 33300 580 20 11500 80×50 2.88 80 7 47 541 45 8950 60.4
800B 45000 670 22 12200 80×50 3.05 80 7 47 573 45 8950 64.0

*1: The effective number of bolts is calculated as half of the actual number of bolts "n".


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