Gear Hobs - CNC Gear Hobbing Machines - CNC Gear Finishers - Kashifuji Hobbers
Gear Hobbing Machines by Kashifuji
Involute Gear and Machine is the authorized distributor of Kashifuji gear hobbing machines in North America with complete sales, service, and support.
Hard Hobbing - The New Gear Process Alternative to Costly Gear Grinding
Hard hobbing removes the heat distortion in hardened gears by using carbide hobs.
Methods - There are two kinds of Hard Hobbing processes that use carbide hobs. One is "Finish Hobbing" which finish hobs hardened gears after the initial tooth cutting. The other is "Solid Gear Hobbing" which directly hobs hardened solid gear blanks. Kashifuji has developed an Auto Part Orientation Device utilizing a special noncontact sensor that quickly and accurately orientates gear teeth to the hob tool.
CNC Hobbing Machine List
High Precision Machine Tools List
- Features
- Specification
Machine Capacity
Max. Workpiece DiameterMax. ModuleMax. Axial Feed TravelMax. Hob Head SwivelMin.-Max. No. of TeethMax. RPM of Hob SpindleMax. RPM of Work Table50 mm2150 mm353 ~ 500500 ~ 2,000 min-1500 min-1
Working Range
Center Distance from Hob to Work TableDistance from Table Top to Tailstock Center35 ~ 120 mm250 ~ 500 mm
Electric
Total PowerMain Motor, AC Spindle Motor18 kVA5.5 kW
Floor Space and Weight
Floor Space: Length x Width x HeightWeight2,510 X 1,360 X 2,200 mm4,000 kg - Dimensions
Front View
Side View
Top View
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Vertical Hob MachineVertical Hob Machine
Changing Fixtures, Hob Cutters or Workpieces (manual loading) is far simpler and faster than in a horizontal hobber as compared to a vertical hobber. As the workpiece /fixture are positioned vertically, they are very easy to exchange and accurately mount. The Hob Head of a vertical hobber allows great accessibility to the work table/tooling area and peripheral equipment (auto loader, transfer unit etc.) can be added without reducing operability!
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Zero Backlash Table -
Hand Scraped GuidewaysHand Scraped Guideways
Kashifuji hand scrapes the guideways on all its hobbing machines to create a platform that dampens and absorbs the intermittent cutting forces that are inherent to hobbing process. This feature allows many years of use while still maintaining superb hobbing accuracies.
Generally, machining has limited achievable accuracies due to friction created distortions and/or internal stress relief produced during the machining process. Variations of temperature and humidity during the machine process can also reduce accuracy. Kashifuji utilizes a hand scraped surface finish to assure highly accurate guideways that are not possible by any machining/grinding process.
Hand Scraping is a finish processing method that makes the guideways extremely accurate with an ideal flatness and straightness by manually removing metal in extremely small amount (1~3 micro meters) by the use of a hand tool called a "Scraper". This hand tool has a carbide tipped single edge blade with a blunt angle. This tool is used to relieve the surface tension (create numerous, evenly distributed small, shallow dips or reliefs) in the guideway surfaces. Scraping produces a very flat surface, and the "shallow divots" retain oil which creates smooth sliding surfaces while reducing wear.
Hand scraping is a labor intensive process. The guideway surfaces are painted with a dye then rubbed with a reference straight edge, the dye collects on the highspots. The highspots are then removed by hand scrapping. This process (applying dye, rubbing & scrapping) is continually repeated until approximately 30% of the guideway surface is relieved producing ~70% bearing surface. This process produces an extreme flatness.
Hand scraping is referred to as a "Master's Skill". Kashifuji's skilled craftsmen are able to make accurate micro-meter scraping marks compensating for variations caused by material or temperatures changes. The "scraping pattern" produced, is often referred to as an "art form", and is unique to each craftsman. It takes many years of tedious, difficult work to acquire the experience & skill to become an accomplished Kashifuji "Scraper"
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Hard Hobbing -
Program- mingProgramming
Programs are created by only inputting part gear data, hob data and cutting conditions. After the completion of the programs, hobbing will be automatically performed by selecting the part number.
Optional crowning, relieving and/or taper hobbing cycles are easily performed. Simple and easy-to-operate hobbing programs are available for a wide variety of production situations, from mass production to special prototype hobbing.
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Auto- mationAutomation
Numerous styles and types of auto loaders, conveyors or part stockers are available for automatic part transfer. All loader design are labor saving and increase efficiency.
Basic 2-Arm Auto Loader(KN80, KN152) Basic Ring Loader (KA200E, KE201/251, KA220/400) Examples of Automation Transfer Example for Flat Gears Examples of Automation Transfer Example for Flat Gears Transfer Example for Shaft Gears Transfer Example for Shaft Gears
Typical Parts Hobbed on the KT50
Production/Hobbing Video
Compact Size
Stable Hobbing Package
Integrated Bed Column
Closed-Loop Designed Over-Arm
(Bed Column and Tailstock Column)
High Speed Work Table Rotation
High Speed Auto Loader
2 Station Auto Loader
3 Station Auto Loader
Model KA220-KA400
6 Axis-CNC Hobbing Machine
Designed for Heavy Duty Hobbing of Medium Sized Gears
An Extremely Rigid Hobbing Machine
– Max. Workpiece Diameter : 250/400 mm
– Max. Module : 8
Model KA1200
6 Axis-CNC Hobbing Machine
Ideally Suited for Large Sized Gears
A Substantial, Accurate and Extremely Rigid Hobbing Machine
– Max. Workpiece Diameter : 1200 mm
– Max. Module : 20
Model KL451
4 Axis-CNC Hobbing Machine
An Extremely Versatile Hobber Covering a Wide Range of Parts
Ideal for Hobbing of Small and Medium Sized Gears
– Max. Workpiece Diameter : 450 mm
– Max. Module : 5
Model KE201-251
6 Axis-CNC Hobbing Machine
Increased Rigidity with a Compact Design
A Complete Dry Cut Hobbing Machine
(Wet Cut Hobbing Machine or Wet/Dry Cut Hobbing Machine is optionally available)
– Max. Workpiece Diameter : 200/250 mm
– Max. Module : 6
Model KN152
6 Axis-CNC Hobbing Machine
Ideally Suited for Hobbing Long Shaft Parts
A Complete Dry Cut Hobbing Machine
(Wet Cut Hobbing Machine or Wet/Dry Cut Hobbing Machine is optionally available)
– Max. Workpiece Diameter : 150 mm
– Max. Module : 4
Model KN80
6 Axis-CNC Hobbing Machine
Ideal for Hobbing Small Gears
An Energy-Saving and Complete Dry Cut Hobbing Machine
(Wet Cut Hobbing machine or Wet/Dry Cut Hobbing Machine is optionally available.)
– Max. Workpiece Diameter : 80 mm
– Max. Module : 4
Model KD1
Gear Duburring Machine
High Speed Gear Chamfering/Deburring
A Deburring Machine with Years of Proven Acceptability