Non-Contact Magnetic Force Gears
Precision Type ∙ Standard Type
Non-Contact Magnetic Force Gears
- Overview -
Q Features: Usable in vacuum
· Fig. 1
Non-Contact Magnetic Force Gears
Gears
Perpendicular Type
Force is transmitted with
Gears arranged at 90°.
CAD Data Folder Name: 19_Gears
When ordering, select Part Number and Values from Selection Steps1~3.
Parallel Type
Force is transmitted
with Gears arranged in
parallel.
Part Number (1Type · 2D)
MDQ22
MEQ35
Magnetic drive components
operate with the transmission
of magnetic force and thus
function without contact.
Q Precision Type
Perpendicular Type Neodymium
Parallel Type Sintered Magnet
H
1Type
2D
16
22
26
35
F = (Workpiece Weight (kg) + Shaft Weight (kg) + Roller Weight (kg)) x Seal Friction
Coefficient
T = (F(N) x D (Roller Dia. (m)) / 2 x Transmission Efficiency) x Safety Factor
Substitution preconditions below.
F=(5+3.5+0.3)x0.1=0.88kg ⇒ 8.6N
T=(8.6x0.05/2x0.9)x3=0.58(N·m)
0.58/ Min. number of gears engaging when transferring workpieces: 5 = 0.116(N·m)
Type
Clean Room
Cogging at Low Speed
Price
Precision
Class 1
Small
High
Large
· Two Rotating Shafts
· Conveyance Transmission
Parallel Type
MDY
6
8
8
10
10
12
12
12
15
15
20
H
W
L
13
18
22
32
12
17
20
29
19.5
23.5
25.5
34.0
8
12
14
22
5
Q Standard Type
Type
MEQ
Combined
Type
Perpendicular Type Neodymium Bonded Magnet
❷D
Part Number
Flux Rate (%)
-15
-20
1
7
Pc=1.0
Pc=2.0
-25
10
3d
Selection
F
Electrostatic Paint
-
20
40
Temperature (°C)
l
W
M
2
12
15
15
20
20
Lock Screw
H
W
L
25.5
33.5
46
14
22
30
5
5
6.35
ECannot be combined with other manufacturer's products. Please be sure to order in pairs.
* Values are for reference at 0.5mm gap.
Standard Service Non-Standard Service
Order
Quantity Regular Quantity Large Quantity
Quantity
1~100
101~
Days to ship
Standard
To be quoted
-10
-30
M
M2.5
M3
M5
Tightening Torque (N·m)
0.333
0.422
0.784
F
1.5
2.0
E
11.5
16.0
20.5
* Allowable Torque
(N·m)
MEQ
0.098
0.221
0.804
Perpendicular Type
Parallel Type
Force is transmitted with Gears
arranged at 90°.
Force is transmitted with Gears
arranged in parallel.
60
· Data 3: Space Magnetic Flux Density by Distance from Non-Contact Magnetic Force Gear (Reference)
Magnetic Flux Density (G)
Flux Rate (%)
2D
26
35
45
Perpendicular Type
-5
Space 25mm or more
0.7
Interval (mm)
Polyacetal
EMax. Speed 1500rpm
EOperating Temperature
0~60°C
E
MEQ
0
Space 45mm or more
0.5
MMaterial
SSurface Treatment
Magnet Section Holder Section Magnet Section Holder Section
1
1Type
MDQ
MDY
MEQ
M4
H
· Data 2: Magnetic Flux Variation Rate by Temperature (Reference)
· Data 1: Torque Rate by Distance Change (Reference)
M3
Q Features: This type is made of plastic and more economical than the Precision Type. Suitable for use in normal atmosphere. Equivalent allowable torque to the Precision Type.
Economical
· Photo 1:Intervals when arranged coaxially
* Allowable Torque
(N·m)
MDQ
MDY
0.013
0.032
0.050
0.105
0.068
0.186
0.245
0.558
M
XPerpendicular Type and Parallel Type cannot be used in combination.
ECannot be combined with other manufacturer's products. Please be sure to order in pairs.
· Angle Conversion
· Design Precautions
· Precautions for Use
·If the design has a coaxial arrangement, the gears attract one another and the
· Allowable torque changes depending on the temperature. (Data 2)
gear position may be misaligned. Keep 45mm or more interval between the
· The following objects are negatively affected by strong magnetic field. (Data 3)
surface of gears (transmission area). In addition, keep 25mm or more interval
Electronic devices such as cellular phones, PCs and watches
between the front side of
Medical electronics such as pacemakers
· No alteration is available for the magnet parts.
·Allowable torque changes depending on the distance between gears. (Data 1)
· Strong impact may cause damage and lead to deterioration in magnetic force.
Recommended interval is 0.5mm. Space 0.3mm or more to avoid contact.
· For its non-contact nature, not suitable for extremely high-speed rotation. (Max. Speed 1500rpm)
·Gears attract one another with the force of up to 7kgf·cm. To avoid contact, fix
them with Bearing with Housing, etc.
0.3
+0.03
D2
* Standard Type may have cogging (rotational wobbles) under low speed applications.
1033
❸d +0.01
D1
+0.05
❸d 0
Class 1
Q Example of Transmission Method
MDQ
3d
Selection
2-M
D2
❷D
Part Number
Perpendicular Type
·Table 1: Difference between Precision Type and Standard Type
Out-gassing
Corrosion Resistant
Prevention Treatment
Anodizing
A5056
l
* Safety Factor is for an example. Please consider according to your design.
* Calculate Transmission Efficiency in reference to the transmission efficiency of gears.
* Calculate Seal Friction Coefficient based on the using bearings, etc.
EMax. Speed 1500rpm
EOperating Temperature
-20~60°C
W
Preconditions
· Roller Dia.: 50mm · Roller Total Weight: 0.3kg · Workpiece Weight: 5kg · Shaft
Size: 12Ø · Shaft Weight: 0.5kg · Number of Shaft: 7 · Seal Friction Coefficient:
0.1 · Transmission Efficiency: 0.9 · Safety Factor: 3 · Use Induction Motor
1Orthogonal Type2Select Precision Type from the shaft size.3Required
Quantity: 144Calculation of Load Torque (Below)5External Size: D356I.D.
Size: d12
· Formula Example
40
30
20
10
0
-10
-20
-30
MMaterial
SSurface Treatment
1Magnet Section 2Holder Section 1Magnet Section 2Holder Section
· Selection Example
· Selection Steps
1Selection of Transmission Direction (Orthogonal Type or Parallel Type)
2Selection of Product Type (Refer to Table 1)
3Calculate the required quantity from the size and the distance of the workpiece.
4Calculation of Load Torque (Refer to the selection example to the right)
5Select External Size from the required load torque per piece.
6Select I.D. Size from the shaft size.
Standard
MDQ
MDY
Precision
Type
3d
8
20
Combined
Type
Type
Q Main Advantages of Non-Contact Magnetic Force Gears
Non-contact rotation gives following advantages.
1Usable in Clean Room
2Almost Permanently Maintenance-Free
· Extra-low particle generation. Usable in clean level 1. · No grease for lubrication required. Replacement due to wear or damage is not needed.
Q Selection Method
-
D1
Q Non-Contact Magnetic Force Gears
Magnetic force gears without teeth
Non-contact rotating motion transmission
without engaging teeth can be achieved by
using magnetic suction and repulsion.
3500
3000
2500
2000
1500
1000
500
0
0
5
10
Distance (mm)
50
1034