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Keyless Bushings(Mechanical Lock), Straight With Centering Function (Part Numbers)

Keyless Bushings(Mechanical Lock), Straight With Centering Function
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MISUMI

MiSUMi Economy

MISUMI

Part Number

Configured Part Number is shown.



Product Overview of Keyless Bushing (Fastening Fittings)

Overview of Keyless Bushing (Fastening Fittings)
It is a friction connector that can easily and firmly fix the shaft and the coupling (pulley, sprocket, gear, etc.) just by tightening the bolt.
The bolt tightening force is converted via the conical surface into the surface pressure on the inner diameter side and the outer diameter side, thus fixing the coupling and the shaft.

Dimensional Drawing of Keyless Bushing (Fastening Fittings)

Outline Dimensional Drawing (Unit: mm)

Dimensional Drawing

Specifications Overview of Keyless Bushing (Fastening Fittings)

・Material Table of Keyless Bushing (Fastening Fittings)
TypeBody
Material Surface Treatment
E-MLMS45C-

Specification Table of Keyless Bushing (Fastening Fittings)

 
formDD 1WL 1L 2L 3fastening boltWeight
(g)		Inner diameter tolerance
μm
TypedM×LCountTightening torque
(N·m)
E-MLM51618.51611.2813M3X1042.120+4.5
+0
82123.518.512.59.514.5M4X125.140
102325.5191315
122628.52215.510.518M4X14660+5.5
+0
142830.56
152931.52316.511.51970
16303323.617.51220
193335.52412.5880+6.5
+0
203842292115.524M5X1810130
224044140
254347312317.526170
30485231.526.510190
32505432.52418.527.5210+7
+0
355762362619.530M6X20817320
406267372720.53110380
426469
45677237.527.52131.5400
50727738.527.521.532.514460
·Material Table of Keyless Bushing (Fastening Fittings)
Typemain body
 texture Surface treatment
E-MLMS45C-

Product Features of Keyless Bushing (Fastening Fittings)

1. No need to machine key grooves.

No need to machine key grooves; you can use the round shaft and round hole as they are.

No need to machine key grooves.

Reduces cutting and machining time, allowing for quick design changes.

2. Installation and removal are easy

Easily install and remove using only bolts.

Installation and removal are easy

No need for specialized tools, making maintenance simple. Parts can be reused, saving costs.

3. Position alignment is flexible.

Can be aligned to any position during assembly.

Position alignment is flexible.

Can control the position during assembly, so there is no need to match the key and groove positions in the design stage.

4. No backlash.

Using a key causes backlash in the key groove, but Megalock has no gaps, making it suitable for locations with repeated forward and reverse movements.

No backlash.

Suitable for long-term, high-precision coaxial tightening and for locations with repeated forward and reverse movements, such as servo motors.

General Installation

General Installation
General Installation

This is the main use of Megalock. Installation and removal are simple, making equipment maintenance more efficient.

Position Alignment

Position Alignment
Position Alignment

Can control the alignment position during assembly, reducing design labor.

Load capacity

Load capacity

Suitable for heavy load areas as it can bear axial loads.

Others

Others

Without backlash, the high-precision coaxial Megalock can also be used as a coupling.


Use Cases of Keyless Bushing (Fastening Fittings)

Economic Mecha Lock standard type (with centering function) use case

<How to Use of Keyless Bushing (Fastening Fittings)>
① When applying lubricant, wipe off any dust on the shaft surface and apply a layer of lubricant or grease.  ※Do not use lubricants or grease containing molybdenum-based antifriction agents.
②Positioning Assemble the elastic sleeve and coupling part and insert them into the shaft for positioning.
③ When tightening the bolt, use a torque wrench to tighten the locking bolt diagonally.
 First tighten the bolt lightly (1/2 of the specified tightening torque) and then tighten to the specified tightening torque. ④Finally, tighten the bolts in order in the circumferential direction with the specified tightening torque.

Caution of Keyless Bushing (Fastening Fittings)

① The inner bushing (main body) and outer bushing (ring, side ring) of the elastic sleeve may vibrate slightly during transportation, and the tapered parts may become wedged together.
 When installing, first loosen the bolts and nuts, disassemble the main body, then loosen the wedge on the tapered surface and assemble.
② If the bolt is tightened before installing in the wheel hole or inserting into the shaft, the mechanical lock will be deformed and cannot be used.
③ Be sure to use the attached bolt for the locking bolt. 

How to use of Keyless Bushing (Fastening Fittings)

Step ① Check the installation space.
When assembling the mecha lock, use a torque wrench.
Please weigh the weight based on the assembly space.
Economical Mecha Lock standard type (with centering function) related products

Step ② Check material and surface treatment
MISUMI’s Mechalock allows you to select the material and surface treatment.  Keyless Bushing (Fastening Fittings), In places with a lot of moisture, such as moisture or condensation, it is recommended to use electroless nickel plating or stainless steel.  Available materials and finishes vary depending on the product range.

Step ③
Check the allowable input load of the mechanical lock Calculate the torque and load applied to the mechanical lock and check whether it is below the allowable value for each product group.
The input torque value of the elastic sleeve < the maximum allowable torque of the
elastic sleeve. The axial load applied to the elastic sleeve < the allowable axial load
width of the elastic sleeve can be used within the range of the JIS standard, but the allowable torque and allowable axial load are 15 to 20. % decrease.

Step ④ Check the rigidity of the shaft and wheel hole.
Check the yield stress of the shaft material used for the shaft, and select a material that is more than wheel hole lateral pressure × 1.2 for each series.
·Check the yield stress of the material used for the wheel hole, and select a material of more than 1.2 wheel lateral pressure for each series.
In addition, the minimum outer diameter of the coupling part was calculated using representative materials. Please refer to the minimum outer diameter table of wheel holes for each product group.

Related Products of Keyless Bushing (Fastening Fittings)

timing pulleysprocket
Economical Mecha Lock standard type (with centering function) related productsEconomical Mecha Lock standard type (with centering function) related products
Features of Keyless Bushing (Fastening Fittings):
No keyway and other axis processing required.
Since shaft processing is not required, the strength of the shaft is not reduced.
Easy to find.		The position of the teeth of the characteristic
keyway and the position of the key are fixed, but the position of the teeth can be
freely adjusted using a keyless sprocket, making alignment easy.

Part Number 

CAD Data download and 3D preview are not available because the part number has not yet been determined.

  • *In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
  • Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.
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CAD Download

30
60
90
  1. 1
Part Number
E-MLM5
E-MLM8
E-MLM10
E-MLM12
E-MLM14
E-MLM15
E-MLM16
E-MLM19
E-MLM20
E-MLM22
E-MLM25
E-MLM30
E-MLM32
E-MLM35
E-MLM40
E-MLM42
E-MLM45
E-MLM50
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipShaft Bore Dia. d
(Ø) 		Hub Dia. D
(Ø) 		Max. Allowable Torque Range
(N•m) 		Max. Allowable Torque
(N•m) 		Allowable Thrust Load
(kN) 		Overall Length
(mm) 		Outer Dia. D1 (or D)
(Ø)

MYR 41.10

1 Piece(s)Available 9 Day(s) 5162.0~20.0104.891318.5

MYR 40.48

1 Piece(s)Available 9 Day(s) 82120.1~50.0289.1614.523.5

MYR 40.26

1 Piece(s)Available 1 Day(s) 10232.0~20.0419.161525.5

MYR 41.36

1 Piece(s)Available 9 Day(s) 122650.1~70.06813.81828.5

MYR 41.98

1 Piece(s)Available 9 Day(s) 142870.1~100.09513.81830.5

MYR 41.94

1 Piece(s)Available 9 Day(s) 152970.1~100.09813.81931.5

MYR 42.06

1 Piece(s)Available 1 Day(s) 1630100.1~150.010113.82033

MYR 42.56

1 Piece(s)Available 1 Day(s) 1933150.1~200.016418.32035.5

MYR 46.62

1 Piece(s)Available 9 Day(s) 2038200.1~300.025129.32442

MYR 47.16

1 Piece(s)Available 1 Day(s) 2240300.1~500.030829.32444

MYR 49.88

1 Piece(s)Available 9 Day(s) 2543300.1~500.034729.32647

MYR 56.02

1 Piece(s)Available 9 Day(s) 3048300.1~500.052536.726.552

MYR 58.64

1 Piece(s)Available 9 Day(s) 3250500.1~700.056336.727.554

MYR 62.42

1 Piece(s)Available 9 Day(s) 3557700.1~1000.070241.63062

MYR 68.34

1 Piece(s)Available 9 Day(s) 40621000.1~3000.0101951.93167

MYR 74.58

1 Piece(s)Available 9 Day(s) 42641000.1~3000.0106151.93169

MYR 77.64

1 Piece(s)Available 9 Day(s) 45671000.1~3000.0113851.931.572

MYR 93.42

1 Piece(s)Available 1 Day(s) 50721000.1~3000.0176872.732.577

Loading...

  1. 1
Dimensional Drawing
Unit: mm

Dimensional Drawing
Specification Table
Part NumberDD1WL1L2L3Clamp ScrewMass
(g)		Bore Tolerance
(Initial State)
μ m
TypedM×LQuantityTightening Torque
(N·m)
E-MLM51618.51611.2813M3X1042.120+4.5
+0
82123.518.512.59.514.5M4X125.140
102325.5191315
122628.52215.510.518M4X14660+5.5
+0
142830.56
152931.52316.511.51970
16303323.617.51220
193335.52412.5880+6.5
+0
203842292115.524M5X1810130
224044140
254347312317.526170
30485231.526.510190
32505432.52418.527.5210+7
+0
355762362619.530M6X20817320
406267372720.53110380
426469
45677237.527.52131.5400
50727738.527.521.532.514460
Material Specification
TypeBody
Material Surface Treatment
E-MLMS45C-
Product Features
FEATURES
Product Features
Example of Use
Example of Use

Example of Use
①Applying lubricant Please wipe off the stains on the shaft surface and apply a layer of lubricant or grease.　*Do not use any lubricant or grease that contains molybdenum abrasion inhibiting agent.
②Positioning Temporarily assemble the economy series keyless bushing and the coupling, and insert the assembly into the shaft for positioning.
③Screwing bolts Use a torque wrench to tighten the fastening bolts diagonally in sequence.
 Firstly tighten the bolts lightly (with 1/2 of the tightening torque), then tighten them with the specified tightening torque.
④Tightening bolts Finally tighten the bolts circumferentially in sequence with the specified tightening torque.

Example of Use
①Removing bolts Loosen the fastening bolts circumferentially in sequence.
②Removing economy series keyless bushing Insert the bolt into the threaded hole for removal, and screw in evenly.
Precautions
Precautions
①The inner bushing (body) and outer bushing (collar, side ring) of the economy series keyless bushing may vibrate slightly during transportation, and their conical surfaces may wedge against each other.
 When installing, loosen the bolts and nuts first, disassemble the body, remove the wedge on the conical surface, and then proceed with assembly.
②If the bolts are tightened before installation into the wheel hole or insertion into the shaft, it will cause deformation of the economy series keyless bushing and make it unusable.
③Be sure to use accessory bolts for clamp screws.

Related Products
Keyless High Torque Timing PulleysKeyless Sprockets
Related Products 1Related Products 2
Features
Shaft machining of keyways, etc. is not required.
As shaft machining is not required, the shaft strength will not be reduced.
Easy to perform positioning.		Features
The positions of teeth and keys in the keyway are fixed, but the positions of teeth can be freely adjusted by using keyless sprockets, thus facilitating the alignment.
Usage Method
Step ① Confirm the mounting space
Use a torque wrench when assembling the economy series keyless bushing.
Please use properly after considering the assembling space.
Related Products 2

Step ② Confirm the materials and surface treatment
Materials and surface treatment can be selected for MISUMI economy series keyless bushing. It is recommended to use electroless nickel plating or stainless steel in places where there is humidity, condensation or a large amount of water. Please note that the provided material and surface treatment vary with product series.

Step ③ Confirm the allowable input load of the economy series keyless bushing
Calculate the torque and load applied on the economy series keyless bushing, and confirm whether they are lower than the allowable values set for each product series.
·Input torque value of keyless bushing < Max. allowable torque of keyless bushing
·Axial load applied on the economy series keyless bushing < Allowable axial load of economy series keyless bushing
Note　When the shaft or wheel hole has keyways, it can be used if the groove width falls in the range of JIS specifications, but the allowable torque and allowable axial load will decrease by 15~20％.

Step ④ Confirm the rigidity of the shaft and wheel hole
·For the shaft, confirm the yield stress of the shaft material used, and choose a material with a yield stress higher than the wheel hole side pressure set for each product series×1.2.
·For the wheel hole, confirm the yield stress of the wheel hole material used, and choose a material with a yield stress higher than the wheel hole side pressure set for each product series×1.2.
The minimum outer diameter of the couping has been calculated for typical materials. Please refer to Minimum Wheel Hole Outer Diameter Table for each product series.

Basic Information

Series Standard Type Centering Function With Centering Function Main Body Surface Treatment None
Tightening Structure Single Cone Type Structure Mechanical Type (Wedge Type) Locking Screw Qty. Multiple pcs.

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18 Part Numbers

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Specification/Dimensions

  • Shaft Bore Dia. d(Ø)

    • 5
    • 8
    • 10
    • 12
    • 14
    • 15
    • 16
    • 19
    • 20
    • 22
    • 25
    • 30
    • 32
    • 35
    • 40
    • 42
    • 45
    • 50

    Clear

  • Hub Dia. D(Ø)

    • 16
    • 21
    • 23
    • 26
    • 28
    • 29
    • 30
    • 33
    • 38
    • 40
    • 43
    • 48
    • 50
    • 57
    • 62
    • 64
    • 67
    • 72

    Clear

  • Max. Allowable Torque Range(N•m)

    • 2.0~20.0
    • 20.1~50.0
    • 50.1~70.0
    • 70.1~100.0
    • 100.1~150.0
    • 150.1~200.0
    • 200.1~300.0
    • 300.1~500.0
    • 500.1~700.0
    • 700.1~1000.0
    • 1000.1~3000.0

    Clear

  • Max. Allowable Torque(N•m)

    • 10
    • 28
    • 41
    • 68
    • 95
    • 98
    • 101
    • 164
    • 251
    • 308
    • 347
    • 525
    • 563
    • 702
    • 1019
    • 1061
    • 1138
    • 1768

    Clear

  • Overall Length(mm)

    • 13
    • 14.5
    • 15
    • 18
    • 19
    • 20
    • 24
    • 26
    • 26.5
    • 27.5
    • 30
    • 31
    • 31.5
    • 32.5

    Clear

  • Outer Dia. D1 (or D)(Ø)

    • 18.5
    • 23.5
    • 25.5
    • 28.5
    • 30.5
    • 31.5
    • 33
    • 35.5
    • 42
    • 44
    • 47
    • 52
    • 54
    • 62
    • 67
    • 69
    • 72
    • 77

    Clear

  • CAD

    • 2D
    • 3D

    Clear

Days to Ship

    • All
    • 1 Day(s) or Less
    • 9 Day(s) or Less

    Clear

Specify Alterations

Frequently asked question (FAQ)

Question: What transmission components can be combined with economy series keyless bushings?
Answer: Guide shafts and parts (pulleys, gears, sprockets), etc. can be easily installed for combined use.
Question: Will they become loose after installation and prolonged use, and can they be used for reverse rotating mechanisms?
Answer: There will be no loosening during use as long as the bolts are tightened, so it is particularly effective for repeated forward and reverse rotation.
Question: Can the coaxiality be guaranteed if no keys are mounted and only bushings are used in the joint area?
Answer: The coaxiality of the parts can be achieved simply by tightening the bolts to install them. There is no need for time-consuming key machining of the shaft and coupling part and the running-in process during assembly, thus reducing the total cost.
Question: What is the tightening principle of the bushing?
Answer: It converts the tightening force for bolt connection into the surface pressure on the inner diameter side through the conical surface, and there is no need for the time-consuming key machining of the shaft and coupling part and the running-in process during assembly, thus connecting the shaft and coupling part firmly.
Question: How many materials are available for selection?
Answer: Currently, MISUMI offers three material choices: steel, stainless steel, and aluminum alloy.

Check other FAQ (2 items) Hide

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