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  • Notice of End of Sales for Economy Series Pneumatic Equipment Category. More information.

Keyless Bushings(Mechanical Lock), Straight (Part Number)

Keyless Bushings(Mechanical Lock), Straight
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Product Overview of Keyless Bushing (Fastening Fittings)

Overview of Keyless Bushing (Fastening Fittings)
Keyless Bushing (Fastening Fittings) 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.

Product Features of Keyless Bushing (Fastening Fittings)

FEATURES of Keyless Bushing (Fastening Fittings)
Product Features

Dimensional Drawing of Keyless Bushing (Fastening Fittings)

Outline Dimensional Drawing of Keyless Bushing (Fastening Fittings) (Unit: mm)

Dimensional Drawing

Example Use of Keyless Bushing (Fastening Fittings)

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.
③Keyless Bushing (Fastening Fittings) 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 (Fastening Fittings) Insert the bolt into the threaded hole for removal, and screw in evenly.

Precautions of Keyless Bushing (Fastening Fittings)

Precautions
①The inner Keyless Bushing (Fastening Fittings) 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 Keyless Bushing (Fastening Fittings) 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.

Specifications Overview of Keyless Bushing (Fastening Fittings)

・Material Table of Keyless Bushing (Fastening Fittings)
Type of Keyless Bushing (Fastening Fittings)Body
Keyless Bushing (Fastening Fittings) MaterialKeyless Bushing (Fastening Fittings) Surface Treatment
E-MLAS45C-

Related Products of Keyless Bushing (Fastening Fittings)

Keyless Bushing (Fastening Fittings) High Torque Timing PulleysKeyless Bushing (Fastening Fittings) Sprockets
Related Products 1Related Products 2
Features of Keyless Bushing (Fastening Fittings)
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 of Keyless Bushing (Fastening Fittings)
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 of Keyless Bushing (Fastening Fittings)

Step ① Confirm the mounting space
Use a torque wrench when assembling the economy series Keyless Bushing (Fastening Fittings).
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 (Fastening Fittings). 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 (Fastening Fittings)
Calculate the torque and load applied on the economy series Keyless Bushing (Fastening Fittings), 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.

Part Number 

  • Incomplete part number.
    Please use left hand selections to complete a part number.
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Part Number
E-MLA19
E-MLA20
E-MLA22
E-MLA25
E-MLA30
E-MLA32
E-MLA35
E-MLA40
E-MLA50
Part NumberPriceMinimum Order Qty.Volume 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)

₹ 2,131.55

1 Piece(s) Available Same day 1947200.1~300.0280292647

₹ 2,150.32

1 Piece(s) Available Same day 2047200.1~300.0280292647

₹ 2,161.56

1 Piece(s) Available Same day 2247300.1~500.0310292647

₹ 2,200.01

1 Piece(s) Available Same day 2550300.1~500.0400322650

₹ 2,305.28

1 Piece(s) Available Same day 3055500.1~700.0530362655

₹ 2,460.29

1 Piece(s) Available Same day 3260500.1~700.0680422660

₹ 2,471.61

1 Piece(s) Available Same day 3560700.1~1000.0750432660

₹ 2,649.00

1 Piece(s) Available Same day 4065700.1~1000.0980492665

₹ 3,336.43

1 Piece(s) Available Same day 50801000.1~3000.01870753280

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  1. 1
Dimensional Drawing
Unit: mm

Dimensional Drawing
Specification Table
Part NumberDWL1BClamp ScrewMass
(g)
Bore Tolerance
(Initial State)
μ m
TypedM×LQuantityTightening Torque
(N·m)
E-MLA1947262017M6X18815200+27
+3
20230
22230
25509240
305510270
326012300+30
+3
35300
406514330
5080322420M8X221237580
Material Specification
TypeBody
Material Surface Treatment
E-MLAS45C-

Basic Information

Series Straight Type Centering Function None Tightening Structure Double Cone Type
Structure Mechanical Type (Wedge Type) Locking Screw Qty. Multiple pcs.

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.

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