Table 1: | Pattern Evaluation (Ring Gear) |
Drive Side | Coast Side | Pattern Condition | Corrective Action | ||||||
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Heel Toe | Toe Heel | ||||||||
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| Drive Side Centered - Coast Side Centered | No correction required. | ||||||
Drive Pinion Issue - 2-Cut Gearset | |||||||||
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| Drive Side Low Heel Contact - Coast Side High Heel Contact |
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| Drive Side Low Heel Contact - Coast Side Low Toe Contact |
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Backlash Issue | |||||||||
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| Drive Side High Heel Contact - Coast Side High Toe Contact | Backlash incorrect. The ring gear is too far away from the drive pinion. Inspect and adjust the backlash as necessary to ensure that it is approximately 0.08-0.13 mm (0.003-0.005 in). | ||||||
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| Drive Side Low Toe Contact - Coast Side Low Heel Contact | Backlash incorrect. The ring gear is too close to the drive pinion. Inspect and adjust the backlash as necessary to ensure that it is approximately 0.08-0.13 mm (0.003-0.005 in). | ||||||
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| Drive Side Centered - Coast Side Centered | No correction required. | ||||||
Drive Pinion Issue - 5-Cut Gearset | |||||||||
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| Drive Side High and Slightly Heel Contact - Coast Side High and Slightly Toe Contact |
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| Drive Side Low and Slightly Heel Contact - Coast Side High and Slightly Toe Contact |
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Backlash Issue | |||||||||
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| Drive Side Heel Contact - Coast Side Toe Contact | Backlash incorrect. The ring gear is too far away from the drive pinion. Inspect and adjust the backlash as necessary to ensure that it is approximately 0.08-0.13 mm (0.003-0.005 in). | ||||||
|
| Drive Side Toe Contact - Coast Side Heel Contact | Backlash incorrect. The ring gear is too close to the drive pinion. Inspect and adjust the backlash as necessary to ensure that it is approximately 0.08-0.13 mm (0.003-0.005 in). |
Drive Side Heel Toe | Pattern Condition | Coast Side Toe Heel | Pattern Condition | Corrective Action |
---|---|---|---|---|
Face Hobbing | ||||
| Toe Contact |
| Heel Contact | Pinion shim correct. Increase backlash. |
| Desirable Pattern - Drive pattern should be centered on tooth |
| Desirable Pattern - Coast pattern should be center to slightly toe on tooth | No correction required. |
| Top Toe Contact |
| Top Heel Contact | Backlash correct. Increase in pinion shim. |
| Root Heel Contact |
| Root Toe Contact | Backlash correct. Decrease in pinion shim. |
| Top Heel Contact |
| Top Toe Contact | Pinion shim correct. Decrease backlash. |
| Root Toe Contact |
| Root Heel Contact | Pinion shim correct. Increase backlash. |
Face Milling | ||||
| Desirable Pattern - Drive pattern should be centered on tooth |
| Desirable Pattern - Coast pattern should be center to slightly toe on tooth | No correction required. |
| Top and Slightly Heel Contact |
| Top and Slightly Toe Contact | Backlash correct. Increase in pinion shim. |
| Root and Slightly Toe Contact |
| Root and Slightly Heel Contact | Backlash correct. Decrease in pinion shim. |
| Heel Contact |
| Toe Contact | Pinion shim correct. Decrease backlash. |