Determination of the tip relief factor
| Symbol | XCa |
|---|---|
| Unit | - |
| Attribute-ID | stplus_switch_iso_tr_15144_X_Ca_combo |
| Numeric ID | 10303 |
| Value Type | PMString |
The tip relief factor applies to gears of ISO accuracy grade up to 6 (ISO 1328-1). For less accurate gears, the factor is set to 1.
The tip relief factor can be determined using the following methods:
Method A
Here, the existing tip relief is taken into consideration in relation to the effective tip relief.
Graph: Tip relief factor XCa according to ISO/TR 15144-1 Method A :
| XCa | Tip relief factor |
| εmax | The greater value of ε1 and ε2 |
| Ca | Tip relief |
| 1 | Upper single point of tooth contact |
Method B
If the manufacturer's selected tip relief is sufficient, Method B can be used.
Graph: Tip relief factor XCa according to ISO/TR 15144-1 Method B.
| XCa | Tip relief factor |
| εmax | The greater value of ε1 and ε2 |
| Ca | Tip relief |
| 1 | Upper single point of tooth contact |
| A | Gear pair with adequate tip relief according to the manufacturer |
| B | Gear pair with inadequate or no or tip relief |