Nachi
Nachi DuAl EX/VX Hob Gear Cutters
Manufacturer: Nachi-fujikoshi corp
Model: DuAl EX/VX Hob
Features
Coating selection chart of wear
| Type | Wet Hobbing (Oil, Emulsion) | Dry Hobbing | |||
|---|---|---|---|---|---|
| Standard Efficiency | High Efficiency | Super High Efficiency | High Efficiency | Super High Efficiency | |
| Re-grinding + Re-coating (Full coating) | Hyper DuAl GP | Hyper DuAl GP | Hyper Dual SP | ||
| Without re-coating (No coating on cutting face) | DuAl VX | DuAl EX | |||
Comparison chart of Hob coating
| Property | DuAl VX | DuAl EX | Hyper DuAl GP | Hyper DuAl SP |
|---|---|---|---|---|
| Wear resistance | ◯ | ◎ | ◎ | ◎ |
| Toughness | ◯ | ◯ | ◎ | ◯ |
| Heat resistance | △ | ◯ | ◎ | ◎ |
| Stability | ◎ | ◎ | ◎ | ◎ |
| Coolant | Wet & Dry | Wet & Dry | Efficient Wet & Dry | Super-efficient Dry |
| Hardness of coating | 2300 ~ 2500 | 2300 ~ 2500 | 2400 ~ 2600 | 2500 ~ 2700 |
| Heat resistance temp. | 850°C | 950°C | 1100°C | 1150°C |
Specialized coating for hobs with improved coating properties. Ideal selection of coating to suit the wear condition.
Performance
Reduction in running cost – DuAl EX Hob
Dry Hobbing without coating on cutting face.
Work spec.: m2.45 × NT54 × HA35° RH SCr420H
Hob: Ø95 × NT12 × 3TH DuAl EX Coating
Conditions: V = 180 m/min f = 3.0 mm/rev Dry Hobbing
Distance: 150 m
Reduction in running cost by stabilization
Wet Hobbing without coating on cutting face – DuAl VX Hob
Work spec.: m2.3 × NT47 × HA21° LH S53C 250~300HB
Hob spec.: Ø80 × NT12 × 3TH
Condition: V = 70 m/min f = 1.5 mm/rev
Climb Hobbing, Oil Coolant Wet Hobbing, Cutting length 150 m
It is possible to operate stable hobbing without chipping even wet condition.
