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Tsubaki Emer-Flex Couplings - 40 / 48 Pages

39
INSTALLATION
1. Reamer Bolt Tightening Torque
EMER-FLEX couplings transmit torque via the friction force between the reamer bolt and the U-nut. Tighten the reamer bolts and U-nuts securely
with the specified torque.
However, NES Series couplings are delivered as a completed assembly; never loosen the hexagon socket head bolt that fastens the disk.
4.90 { 0.5 } M 5
8.82 { 0.9 } M 6
8.82 { 0.9 } M 6
21.6 { 2.2 } M 8
21.6 { 2.2 } M 8
41.2 { 4.2 } M10
78.4 { 8.0 } M12
78.4 { 8.0 } M12
177 { 18.1 } M16
177 { 18.1 } M16
470 { 48.0 } M20
657 { 67.0 } M24
470 { 48.0 } M20
NEH 14 568 { 58.0 } M22
784 { 80.0 } M24
1170 {119.0 } M27
1590 {162.0 } M30
2254 {230 } M36
2548 {260 } M36
3234 {330 } M39
3920 {400 } M42
4900 {500 } M45
5488 {560 } M48
6860 {700 } M52
N¥..m {kg f¥..m}
NEF 02
NEF 04
NEF 10
NEF 18
NEF 25
NEF 45
NEF 80
NEF130
NEF210
NEF340
NEF540
NEF700
NEH 09
NEH 20
NEH 30
NEH 41
NEH 55
NEH 70
NEH 90
NEH110
NEH135
NEH150
NEH180
Model No.
Reamer Bolt
Tightening Torque Reamer Bolt Size
Table 4 NEF Series (except G type)
M 6
NEF 80G 78.4 { 8.0 } M 8
78.4 { 8.0 } M 8
177 { 18.1 } M10
177 { 18.1 } M10
470 { 48.0 } M12
657 { 67.0 } M12
470 { 48.0 } M12
568 { 58.0 } M12
784 { 80.0 } M16
1170 { 119.0 } M16
1590 { 162.0 } M20
Gear Coupling Compatible Type
N¥..m {kg..f¥..m}
NEF 45G 41.2 { 4.2 }
NEF130G
NEF210G
NEF340G
NEF540G
NEF700G
NEH 09G
NEH 14G
NEH 20G
NEH 30G
NEH 41G
N¥..m {kg..fE..m}
M10 8.82 { 0.9 }
M12 21.6 { 2.2 }
M12 21.6 { 2.2 }
M16 41.2 { 4.2 }
M16 41.2 { 4.2 }
M20 78.4 { 8.0 }
M24 78.4 { 8.0 }
M20 78.4 { 8.0 }
M22 78.4 { 8.0 }
M24 177 { 18.1 }
M27 177 { 18.1 }
M30 470 { 48.0 }
Reamer Bolt Face-to-Face Dimensions Unit: mm
Model No.
Reamer Bolt (A)
Tightening Torque
Reamer Bolt (B)
Size of Reamer Bolt (A) Tightening Torque Size of Reamer Bolt (B)
Size M5 M6 M8 M10 M12 M16 M20 M22 M24 M27 M30
S 8 10 13 17 19 24 30 32 36 41 46
2. Tightening the Reamer Bolt
When tightening the reamer bolts, be careful not to apply an axial force to the coupling hub.
If an axial force is applied to the hub, the disk may warp and become fixed in that warped state. Tighten the reamer bolts securely with the torque
specified in the table above.
œ Pressure Bolt Tightening Torque
The pressure bolt tightening torque varies depending on the coupling model number and the Power-Lock size
(shaft diameter). Tighten the pressure bolt with the proper torque listed in the “Combinations with Power-
Lock” table on p. 31.
œ The U-nut is made of metal. It can be mounted and dismounted up to 20 times.
If you will need to mount and dismount the U-nut more than 20 times, keep a spare U-nut on hand.
3. Anti-Rotation Hole
With the Power-Lock type coupling, anti-rotation holes are provided in the pressure flange, allowing the pressure bolt and reamer bolt to be easily
tightened. The bolts can be easily mounted using an anti-rotation bar.
4. Removing the Coupling
The Spacer Type coupling can be removed from the shaft without running the drive or driven equipment. This feature considerably simplifies
centering adjustment when re-mounting the coupling.
1. Loosen all reamer bolts and remove the disks and spacers. (Fig. 1)
2. Loosen the set bolt that fastens the hub, and then slide the hub off to remove it. (Fig. 2)
3. To re-mount the coupling, perform the above steps in reverse order. After both hubs are
mounted to the shaft, it is recommended that you check the centering level to verify the
mounting state.
5. Inspection
After operating the equipment for one or two hours, check the angular misalignment and the parallel misalignment once again. At this time, re-tighten
the bolts and nuts with the torque specified in the table above.
Once the equipment has been in operation for 6 months or one year, check the U-nuts for looseness. It is recommended that you mark the reamer
bolts and U-nuts at the time of installation so that you can check for looseness later on. Be sure to check for any abnormalities in other components as
well.
Pressure Flange
Anti-Rotation Bar
Fig. 1
Hub
Fig. 2

Tsubaki Emer-Flex Couplings
  1. P. 1

  2. P. 35

    34EMER-FLEXNEF-GNEF Series: Gear Coupling (G-Type) Compatible CouplingsThrough a reduction in the hub face distances (dimension “D”), the NEF-G...
  3. P. 36

    35NEW PRODUCTS
  4. P. 37

    36EMER-FLEXOTHER TYPES OF COUPLINGSœEnvironmentally Resistant (Electroless Nickel-Plated / Stainless Steel Type)The disk on these couplings is made...
  5. P. 38

    37INSTALLATIONCentering Adjustment‡@ Single and Spacer Type CouplingsThe more accurate the initial centering of the coupling, the less stress it...
  6. P. 39

    38EMER-FLEXGear Coupling Compatible TypeHub G Face DistanceParallel Misalignment Angular MisalignmentModel No.Angular Misalignment ParallelMisalignmentƒÃimmjHub...
  7. P. 40

  8. P. 41

    40EMER-FLEXInstalling NES Series couplings1. Installing the CouplingRead the instruction manual carefully to understand the proper method of handling couplings....
  9. P. 42

    41BORE SPECIFICATIONSSpacer TypeiStandard Hub×Standard HubjNEF  W-N  ×N   Single TypeiStandard Hub×Standard...
  10. P. 43

    42EMER-FLEXDimension “F”Model No. NEF02 NEF04 NEF10 NEF18 NEF25 NEF45 NEF80 NEF130 NEF210 NEF340 NEF540 NEF700Dimension “F” 5 8...
  11. P. 44

    43BORE SPECIFICATIONSHubChuckHubChuck2. Centering AdjustmentBefore machining shaft bores, perform the centering adjustment asshown below:Hub3. Shaft Bore...
  12. P. 45

    44EMER-FLEXShaft Dia. Power-Lock SizeHub Pressure FlangeShaft Bore Diameter Axial DimensioniAj Pressure Flange Inside/Outside DiametersöD1 öD2No....
  13. P. 46

  14. P. 47

  15. P. 48

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