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- > No.000172 Space-Saving Long-Stroke Mechanism
No.000172 Space-Saving Long-Stroke Mechanism
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Speeding up with long stroke.
Relevant 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
| 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 | ||||||
| φ12 | □25 | Tapped | M3×0.5 | ○ | ○ | ○ | ○ | ○ | ○ | − | − | − | − | − | − | 22 | 3.5 |
| φ16 | □29 | M4×0.7 | ○ | ○ | ○ | ○ | ○ | ○ | − | − | − | − | − | − | |||
| φ20 | □36 | M5×0.8 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | − | − | 29.5 | 4.5 | |
| φ25 | □40 | M6×1.0 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | − | − | 32.5 | 5 | |
| φ32 | □45 | M8×1.25 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | − | − | 33 | 7 | |
| φ40 | □52 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | 39.5 | |||
| φ50 | □64 | M10×1.5 | − | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | 40.5 | 8 | |
| φ63 | □77 | − | − | − | − | − | ○ | − | − | − | ○ | ○ | ○ | 46 | |||
| φ12 | □25 | Threaded | M5×0.8 | − | ○ | − | ○ | − | ○ | − | − | − | − | − | − | 22 | 14 |
| φ16 | □29 | M6×1.0 | − | ○ | − | ○ | − | ○ | − | − | − | − | − | − | 15.5 | ||
| φ20 | □36 | M8×1.25 | − | ○ | − | − | − | ○ | − | − | − | ○ | − | − | 29.5 | 18.5 | |
| φ25 | □40 | M10×1.25 | − | ○ | − | − | − | ○ | − | − | − | ○ | − | − | 32.5 | 22.5 | |
| φ32 | □45 | M14×1.5 | − | ○ | − | − | − | ○ | − | − | − | ○ | − | − | 33 | 28.5 | |
| φ40 | □52 | − | ○ | − | − | − | ○ | − | − | − | ○ | − | ○ | 39.5 | |||
| φ50 | □64 | M18×1.5 | − | ○ | − | − | − | ○ | − | − | − | ○ | ○ | ○ | 40.5 | 33.5 | |
| φ63 | □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．Verify the lateral load applicable 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 | ||
| φ12 | Outstroke | 45 | 57 |
| Instroke | 34 | 42 | |
| φ16 | Outstroke | 80 | 101 |
| Instroke | 60 | 75 | |
| φ20 | Outstroke | 126 | 157 |
| Instroke | 94 | 118 | |
| φ25 | Outstroke | 196 | 245 |
| Instroke | 151 | 189 | |
| φ32 | Outstroke | 322 | 402 |
| Instroke | 241 | 302 | |
| φ40 | Outstroke | 503 | 628 |
| Instroke | 422 | 528 | |
| φ50 | Outstroke | 785 | 982 |
| Instroke | 660 | 825 | |
| φ63 | Outstroke | 1247 | 1559 |
| Instroke | 1121 | 1402 | |
Floating joint
| Product name | Floating Connectors - Extra Short Threaded Stud Mount |
|---|---|
| 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 Connectors - Extra Short Threaded Stud Mount
| Body / Cover | Joints | Spring | Washer | |||||
|---|---|---|---|---|---|---|---|---|
| Material | Surface Treatment | Material | Surface Treatment | Hardness | Material | Material | Surface Treatment | Hardness |
| 1045 Carbon Steel | Black Oxide | 1045 Carbon Steel | Black Oxide | 35 - 45 HRC | 304 Stainless Steel−WPB | 304 Stainless Steel | Nitriding Treatment | 600HV - |
| 304 Stainless Steel | − | 440C Stainless Steel | − | |||||
■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
- Provide long stroke vertical motion using two stages of linear guides and air cylinders.
- Operation
- The two stage design allows for longer 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：φ20mm
- Cylinder output：126×70％N（Applied pressure 0.4MPa）
- Outer dimensions：W230×D105×H157（H245 when ascended）mm
Required Performance
- Running parallelism：15×2=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×g+M2×g=1×9.8+2×9.8=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 φ12mm 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 φ20mm is selected. - Based on the thrust of a cylinder with a φ20 inner diameter mm: P', the allowable ascending load: W' is verified.
P'=π/4×20²×0.4=126N
W'=P'×η-W2=126×0.7-19.6=68.6N
⇒Allowable ascending load：W'=68.6N
Other Design Consideration
- Cylinder tube inner diameter will usually increase with stroke.
Linear guide must have length equivalent to stroke.
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