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No.000042 Manually Indexed Rotary Table
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Ball Buttons are used to prevent wear on the outside of the housing.
Relevant category
Ball button
| Product name | Ball Buttons- Tapped |
|---|---|
| Part number | TBBT8 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Contact is made at the retaining position, reducing wear on the outside body.
Risk info.
Some wear and dents.
Available sizes
■Ball button (Tap type)
Material: W1-9 Carbon Tool Steel (Hardness: 55~60HRC)
Surface treatment: Electroless nickel plating
| Thread DIA. (Coarse) | Thread length | Button O.D. | Button height |
|---|---|---|---|
| M4 | 5 | φ8 | 3 |
| M5 | 6 | φ9 | 3 |
| M6 | 8 | φ12 | 3 |
| M8 | 10 | φ15 | 4 |
| M10 | 12 | φ20 | 4 |
| M12 | 15 | φ22 | 4 |
* When combining with ball plungers, use the same thread DIA.
Accuracy Info
■Accuracy of Ball button (Tap type)
Concentricity of the thread and the notch: 0.1
Ball plunger
| Product name | Ball Plungers - Long |
|---|---|
| Part number | BPJL8 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for temporarily retaining the table in the preferred working position.
Available sizes
■Ball plunger (Long)
| Ball material | Load type | Body | Ball | Spring | |||
|---|---|---|---|---|---|---|---|
| Material | Hardness | Surface treatment | Material | Hardness | Material | ||
| Metal | For extra light loads | 1045 Carbon Steel | 29- 35HRC | Black oxide | 52100 Bearing Steel | 55HRC- | SWP−B |
| For light loads | |||||||
| For heavy loads | 304 Stainless Steel | − | − | ||||
| For extra heavy loads | 1045 Carbon Steel | 29- 35HRC | Nickel plating | ||||
| Resin | For extra light loads | Black oxide | Polyacetal - | − | |||
| For light loads | |||||||
| For heavy loads | |||||||
| For extra heavy loads | Nickel plating | ||||||
■Sizes and Dimensions
| Thread DIA.(Coarse) | Metal ball | Plastic ball | Body length | ||
|---|---|---|---|---|---|
| DIA. | Stroke | DIA. | Stroke | ||
| M3 | φ1.5 | 0.5 | − | − | 13 |
| M4 | φ2.5 | 0.8 | φ2.4 | 0.7 | 15 |
| M5 | φ3 | φ3 | 0.8 | 18 | |
| M6 | φ3 | φ3 | 0.8 | 20 | |
| M8 | φ4 | 1 | φ4 | 1 | 23 |
| M10 | φ5 | 1.2 | φ5 | 1.2 | 27 |
| M12 | φ7.1 | 1.8 | φ7 | 1.8 | 32 |
| M16 | φ9.5 | 2.5 | φ9.5 | 2.5 | 40 |
＊Plastic ball type for thread DIA. M3 is not available.
Performance info.
■Ball plunger (Long) spring load (N)
| Thread DIA. (Coarse) | For extra light loads | For light loads | For heavy loads | For extra heavy loads | ||||
|---|---|---|---|---|---|---|---|---|
| min. | max. | min. | max. | min. | max. | min. | max. | |
| M3 | 0.3 | 0.6 | 1.0 | 2.0 | 1.5 | 2.9 | 2.2 | 5.0 |
| M4 | 0.6 | 1.6 | 2.0 | 4.9 | 3.9 | 9.8 | 2.5 | 12.6 |
| M5 | 1.0 | 3.1 | 2.9 | 9.8 | 4.9 | 19.6 | 11.7 | 25.1 |
| M6 | 1.6 | 4.9 | 4.9 | 14.7 | 9.8 | 29.4 | 18.7 | 35.3 |
| M8 | 2.4 | 6.4 | 6.9 | 19.6 | 12.7 | 39.2 | 24.5 | 46.8 |
| M10 | 3.0 | 8.1 | 8.8 | 24.5 | 18.6 | 49.0 | 26.7 | 58.7 |
| M12 | 3.5 | 9.7 | 9.8 | 29.4 | 19.6 | 58.8 | 26.1 | 62.3 |
| M16 | 5.7 | 15.8 | 15.7 | 49.0 | 29.4 | 98.0 | 55.4 | 116.0 |
＊Load "min." is the initial load, and "max." is when the ball is fully depressed.
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- * Unit assembly Data consists of some sub-assemblies.
It is configured so that each sub-assembly unit can be used as it is or edited.
Application Overview
Purpose
- A manually indexed rotary table using a ball plunger and ball buttons.
- Used for inspecting specific locations on a component with microscope.
Target workpiece
- Plastic case
Case dimensions: φ110 H20
Design Specifications
Operating Conditions or Design Requirements
- External dims.: W100 x L170 x H129
- Table O.D.: 120
Required Performance
- Retaining force that withstands 10N of external force applied.
Selection Criteria for Main Components
- For ease of adjustment, Long Ball Plunger is used in this application.
Design Evaluation
Verification of main components
- Select a ball plunger capable of retaining a workpiece.
- Ball plunger retention force calculations
- V groove angle of the ball button is 45 degrees per side, and plunger setting load and operation force are the same.
The retaining force with plunger setup for 0.078mm stroke (almost zero touch) is
0.99N + 6.9N = 7.9N - Max. force to overcome the V groove is at the plunger stroke 0.75mm,
9.525N+6.9N=16.425N - Distance from ball button groove edge to the rotation center is approx. 53mm,so the torque that it takes to overcome the V groove is approx. 16.425 × 0.053 = 0.87N･m (Actually a little more due to friction)
When an external force 1.0kg (10N) applies to the center of handle (80mm from the center of rotation), the torque is 0.8N･m
⇒ BPJL8 where the retention force covers the load value is selected.
- V groove angle of the ball button is 45 degrees per side, and plunger setting load and operation force are the same.
Other Design Consideration
- A bearing holder is used to retain rotation.
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