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No.000043 Simple slide positioning unit
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Simple indexing slide mechanism using roller plunger
Related Category
Roller Plunger
| Product name | Roller Plungers/Mounting Type/Vertical Mount |
|---|---|
| Model number | TBPJ1A |
| Characteristic | Long Stroke |
* Orange colored cells in the table below indicate the part numbers that were actually used in this app. example.
Selection criteria
Suitable for temporary table retention during operation.
Risk info.
Insufficient retaining force, durability
Available sizes
■Sizes and Dimensions
| Load type | Roller facing direction | Roller O.D | Roller ･ Pin length (No load) | Stroke | Body length | Body width | Overall height | Roller ･ Pin shaft height |
|---|---|---|---|---|---|---|---|---|
| For light loads | Side facing | Ø14 | 25 | 5 | 48 | 38 | 25 | 12 |
| Ø19 | 27.5 | |||||||
| For heavy loads | Ø14 | 25 | ||||||
| Ø19 | 27.5 | |||||||
| For light loads | Vertically facing | Ø14 | 25 | |||||
| Ø19 | 27.5 | |||||||
| For heavy loads | Ø14 | 25 | ||||||
| Ø19 | 27.5 |
Mechanism Info.
■Roller plunger (Mounting type) structure diagram
･ The plunger has a bearing mounted on the tip of pin guided by a bushing, and is stroked by the spring load
･ A screw for anti-rotation and stroke adjustment combination is mounted on the pin.
Performance info.
■Spring load of Roller Plunger (Mounting type)
| Load type | Roller direction | Roller O.D | Load (N) | |
|---|---|---|---|---|
| min. | max. | |||
| For light loads | Horizontal facing | Ø14 | 3.0 | 5.1 |
| Ø19 | ||||
| For heavy loads | Ø14 | 6.1 | 10.4 | |
| Ø19 | ||||
| For light loads | Vertically facing | Ø14 | 3.0 | 5.1 |
| Ø19 | ||||
| For heavy loads | Ø14 | 6.1 | 10.4 | |
| Ø19 | ||||
* Min. load is an initial load, Max. load is when the pin is depressed
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Application Overview
Purpose
- Manual operated slide unit that uses roller plunger to index the workpiece to required positions.
- Useful for microscope inspections of sample pieces.
Target workpiece
- Small PC board
Size: W49.5 x D29.5 x t1.6
Design Specifications
Operating Conditions or Design Requirements
- External dims: W170 x D190 x H58
Required Performance
- Apply 2N of external restraining force.
Selection Criteria for Main Components
- A roller plunger is selected for fixture guiding and indexing.
Design Evaluation
Verification of main components
- Verify that the roller plunger can retain the workpiece.
- Calculation of roller plunger retention force
- App. condition: Horizontal mount
- Conditional values: External force F0 = 0.2kg
Friction coefficient µ = 0.5
Gravitational acceleration g = 9.8m/s²,then - Min. retention force against external force Fmin = F0 x g / µ = 0.2 x 9.8 /
- Also, roller plunger (TBPJ1A) load F: 3.0 ~ 5.1N * Value from catalog
- Push force Fs: F x cosα = 3.0 x cos30N = 2.6N per one side when pushed against a V groove of 120 degrees.
- For both sides, 2.6 x 2 = 5.2N, this is the retention force of a plunger and the V groove.
Other Design Consideration
- To secure plunger's position retention, a V groove block is used.
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