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No.000172 Space-Saving Long-Stroke Mechanism
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Speeding up with long stroke
Related Category
Compact Cylinders
| Product name | Compact Cylinders |
|---|---|
| Part number | MSCCN20-50 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Effective for building a small-sized linear motion system
Available sizes
■Compact Cylinders Double Acting Standard Stroke Type
| Tube I.D. | External Size | Rod Tip Screw | Stroke St | Body Length (+ St shown below) | Rod Tip Length | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Screw Type | Dia. - Pitch | ||||||||||||||||
| 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 75 | 100 | ||||||
| Ø12 | □25 | Tapped | M3 x 0.5 | ○ | ○ | ○ | ○ | ○ | ○ | - | - | - | - | - | - | 22 | 3.5 |
| Ø16 | □29 | M4 x 0.7 | ○ | ○ | ○ | ○ | ○ | ○ | - | - | - | - | - | - | |||
| Ø20 | □36 | M5 x 0.8 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | - | - | 29.5 | 4.5 | |
| Ø25 | □40 | M6 x 1.0 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | - | - | 32.5 | 5 | |
| Ø32 | □45 | M8 x 1.25 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | - | - | 33 | 7 | |
| Ø40 | □52 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | 39.5 | |||
| Ø50 | □64 | M10 x 1.5 | - | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | 40.5 | 8 | |
| Ø63 | □77 | - | - | - | - | - | ○ | - | - | - | ○ | ○ | ○ | 46 | |||
| Ø12 | □25 | Threaded | M5 x 0.8 | - | ○ | - | ○ | - | ○ | - | - | - | - | - | - | 22 | 14 |
| Ø16 | □29 | M6 x 1.0 | - | ○ | - | ○ | - | ○ | - | - | - | - | - | - | 15.5 | ||
| Ø20 | □36 | M8 x 1.25 | - | ○ | - | - | - | ○ | - | - | - | ○ | - | - | 29.5 | 18.5 | |
| Ø25 | □40 | M10 x 1.25 | - | ○ | - | - | - | ○ | - | - | - | ○ | - | - | 32.5 | 22.5 | |
| Ø32 | □45 | M14 x 1.5 | - | ○ | - | - | - | ○ | - | - | - | ○ | - | - | 33 | 28.5 | |
| Ø40 | □52 | - | ○ | - | - | - | ○ | - | - | - | ○ | - | ○ | 39.5 | |||
| Ø50 | □64 | M18 x 1.5 | - | ○ | - | - | - | ○ | - | - | - | ○ | ○ | ○ | 40.5 | 33.5 | |
| Ø63 | □77 | - | - | - | - | - | ○ | - | - | - | ○ | ○ | ○ | 46 | |||
* Sensors are sold separately
Selection steps
■Selection procedure of compact cylinders (See "Technical Information" shown below for details.)
1. Define various conditions of the load
↓
2. Calculate cylinder output (In case of double acting type)
↓
3. Determine the tube I.D.
↓
4. Determine the theoretical reference speed
↓
5. Verify the cylinder's cushion mechanism
↓
6．Verification of lateral load which is supplied to the cylinder
Performance info.
■Load Information of Compact Cylinders
Min. Operating Pressure: 0.1 MPa
Max. Operating Pressure: 1.0 MPa
Theoretical Output (N) :
| Tube I.D. | Operation Direction | Operating Pressure (MPa) | |
|---|---|---|---|
| 0.4 | 0.5 | ||
| Ø12 | Outstroke | 45 | 57 |
| Instroke | 34 | 42 | |
| Ø16 | Outstroke | 80 | 101 |
| Instroke | 60 | 75 | |
| Ø20 | Outstroke | 126 | 157 |
| Instroke | 94 | 118 | |
| Ø25 | Outstroke | 196 | 245 |
| Instroke | 151 | 189 | |
| Ø32 | Outstroke | 322 | 402 |
| Instroke | 241 | 302 | |
| Ø40 | Outstroke | 503 | 628 |
| Instroke | 422 | 528 | |
| Ø50 | Outstroke | 785 | 982 |
| Instroke | 660 | 825 | |
| Ø63 | Outstroke | 1247 | 1559 |
| Instroke | 1121 | 1402 | |
Floating Joint
| Product name | Floating Joints -Extra Short Threaded Stud Mount/Threaded |
|---|---|
| Part number | FJCMX5-0.8 |
| Features | Floating joints that can be used where there is little distance between cylinders and moving objects. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for absorbing deviations in the radial direction.
Available sizes
■Floating Joint Extra Short Lateral Misalignment Angular Misalignment Tolerant Threaded Stud Mount - Threaded (for Tapped Cylinder)
| Body / Cover | Joints | Spring | Washer | |||||
|---|---|---|---|---|---|---|---|---|
| Material | Surface Treatment | Material | Surface Treatment | Hardness | Material | Material | Surface Treatment | Hardness |
| EN 1.1191 Equiv. | Black Oxide | EN 1.1191 Equiv. | Black Oxide | 35 - 45 HRC | EN 1.4301 Equiv. - WPB | EN 1.4301 Equiv. | Nitriding Treatment | 600HV - |
| EN 1.4301 Equiv. | - | EN 1.4125 Equiv. | - | |||||
■Sizes
| Cylinder Mounting Side | Output Side | Allowable Misalignment [U] | Allowable Angular Deviation [A] | Body Thickness | Body Hex size | Overall Length | ||
|---|---|---|---|---|---|---|---|---|
| Screw Dia. - Pitch | thread length | Screw Dia. - Pitch | thread length | |||||
| M5 - 0.8 | 6 | M8 - 1.25 | 8.5 | 0.5 | 4° | 14 | 24 | 33 |
| M6 - 1.0 | ||||||||
| M8 - 1.25 | 8.5 | M10 - 1.5 | 10 | 15.5 | 27 | 39.5 | ||
| M10 - 1.5 | 10 | M14 - 2.0 | 11 | 19.5 | 30 | 47 | ||
< Allowable lateral misalignment U and allowable angular misalignment A >
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Application Overview
Purpose
- Purpose
- The lift stroke mechanism retracts to a height below the roller conveyor height (H = 162mm) and advances upward by 100mm up to the processing position when receiving and passing a workpiece on the pallet.
- Operation
- By using air cylinders and linear guides in combination, the length of the mechanism in the movement direction is shortened while it moves upwards through a long stroke.
Target workpiece
- Shape: box shape workpiece
- Size: W100 x D80 x H50mm
- Weight: 1kg
Design Specifications
Operating Conditions or Design Requirements
- Ascending / descending stroke: 100mm
- Cylinder stroke: 50mm
- Tube inner diameter: Ø20mm
- Cylinder output: 126 x 70%N (Applied pressure 0.4MPa)
- Outer dimensions: W230 x D105 x H157 (H245 when ascended)mm
Required Performance
- Running parallelism: 15 x 2 = 30µm
- Allowable Load: 60N
Selection Criteria for Main Components
- Air Cylinder
- Stroke of 50mm or longer and output of 30N or above
Design Evaluation
Verification of main components
- A cylinder is selected so that the force required for raising the workpiece is obtained.
- Ascending output
- Conditional value: target workpiece mass: M1 = 1kg, ascending structure mass: M2 = 2kg, ascending stroke: L = 100mm, gravitational acceleration g = 9.8m/s², air pressure: a = 0.4MPa, cylinder load factor: η = 70% = 0.7
- Load applied during ascending: W = W1 + W2 = M1 x g + M2 x g = 1 x 9.8 + 2 x 9.8 = 9.8 + 19.6 = 29.4N
- Required cylinder thrust: P = W / η = 29.4 / 0.7 = 42N
⇒A cylinder with a cylinder inner diameter of Ø12mm or higher is selected. - Stroke: L = 100mm, stroke required for each cylinder: L' = L / 2 = 100 / 2 = 50mm
⇒A standard cylinder with a stroke of 50mm and an inner diameter is Ø20mm is selected. - Based on the thrust of a cylinder with a Ø20 inner diameter mm: P', the allowable ascending load: W' is verified.
P'= π / 4 x 20² x 0.4 = 126N
W' = P' x η - W2 = 126 x 0.7 - 19.6 = 68.6N
⇒Allowable ascending load: W' = 68.6N
Other Design Consideration
- When selecting a 100-mm stroke, the cylinder tube inner diameter as well as outer dimensions become larger.
A linear guide that needs to have a length equivalent to the stroke + the guide also becomes longer, making it difficult to be installed in a structure that necessitates escaping. Therefore, this mechanism is effective for space-saving.
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