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6 Axis-CNC Hobbing Machine

KE201 / 251

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
  • Feature
  • Specifications
  • Catalog


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  • 縦型ホブ盤

    Hob Machine

  • 摺動面きさげ加工


  • テーブルB/E


  • 自動化


  • 機内面取り装置

    In Machine Chamfering Unit

  • ハードホビング

    Hard Hobbing

  • 加工プログラム


Typical Parts Hobbed

・ Large Automotive Transmission Gear
・ Truck Gear
・ Final Ring Gear
・ Motorcycle Gear
・ Agricultural Machine Gear
・ Construction Machine Middle Size Gear

A Compact Hobbing Machine with Increased Rigidity

The X, Y and Z axes guideways are hand-scraped to increase the way load bearing capacity which creates stable hobbing of large module gears. The machine body has a flat and narrow design by optimally allocating the peripheral equipment into mechanical free areas. Also, the design of the covers, wiring and piping around the hob head is significantly improved creating a “clean” machine appearance.

Two Machine Layouts

There are two types of machine footprints available depending on the factory layout. One is type A (standard) which has a narrower machine width than its predecessor. The other is type B which is suitable for an automated part transfer production line.

Stable Hobbing Accuracies

The newly developed “Tooth Thickness Stabilizer” Compensation Device (patent pending) maintains the center distance between the hob/work table and is included as a standard feature. Due to this “Tooth Thickness Stabilizer” the KE251 delivers a stable O.B.D. (tooth thickness) size producing a variation of less than ±10 μm from mean size.

Ultra-Fast Dry Cut Hobbing and High Speed Hobbing using Water Soluble Coolant

Ultra-fast dry cut hobbing at a surface speed of 300m/min is possible. Also, large pitch gears, which are difficult to dry cut, can be hobbed with the use of water soluble coolant allowing high speed hobbing as fast as dry cut hobbing (Optional modifications to the machine are required when using water soluble coolant).

Reduced Lubrication Oil Consumption

The new lubrication system using low-viscosity grease is employed. With this system the lubrication cycle interval is extended as compared to the previous oil circulating system providing a significant reduction of lubrication oil consumption.

An Innovative Hob Head and Work Table Design specifically for Highly Accurate Finish Hobbing(Special Option)

A new highly accurate hob head utilizing a built-in spindle motor and/or a highly accurate work table design with a built-in servo motor is optionally available for extremely accurate and high speed hobbing of small module gears. The high speed direct drive motor system of the hob head and work table delivers highly accurate finish hobbing equivalent to gear grinding or hard hobbing.

Rotary Chamfering Device(Special Option)

By utilizing a 4 station ring loader, chamfering and deburring can be performed during the hobbing cycle. Efficient use of machine’s open tooling area and independently aligned chamfer and deburring axes allow for easy adjustments / changeovers from the front of the machine. Additionally, the production line length & cycle time are reduced due to the combined operations of hobbing, chamfering and deburring.


  • Machine Type




    Max. Workpiece Diameter



    Max. Module



    Max. Axial Feed Travel



    Max. Hob Head Swivel



    Max. Hob Size: Diameter x Length



    Max. Hob Shift Travel



    Max. RPM of Hob Spindle



    Max. RPM of Work Table






  • Floor Space: Length x Width x Height

    Type A

    2,110 × 2,195 × 2,773 mm

    Type B

    3,110 × 1,525 × 2,773 mm

Product Catalog

You can download the PDF data of product catalogs by adding the desired catalog to the list and filling out the form at each download link.

Inquiries about This Product

We are dedicated to a fast response to your request, and will make every attempt to respond in a timely manner. Requests received on Holidays or Weekends will be handled on the next business day in most cases.

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Vertical 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!


Hand 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".


Zero Backlash Table(Work Table Backlash Eliminator)

Kashiufji designed and developed a hydraulically controlled split worm Work Table Backlash Eliminator.

This device creates a Zero Backlash condition for the work table under all cutting conditions. The backlash eliminator suppresses work table vibrations assuring smooth and highly accurate work table rotation. The rotational accuracy of the work table will not degrade with use, as the device is self-adjusting (maintenance-free).

The backlash eliminator allows consistency in hobbing accuracies especially when hobbing large pitch gears, hobbing with a carbide skiving hob cutter and opposite hand hobbing (lead angle of a hob cutter is opposite of the helix angle of the part).



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


Transfer Example for Flat Gears


Transfer Example for Flat Gears


Transfer Example for Shaft Gears


Transfer Example for Shaft Gears


In-machine chamfering unit (optional specifications)

<Stock removal process using a chamfering cutter>
The use of an auto part loader device enables chamfering and deburring during the hobbing process. By effectively using the open space of the machine and by making the chamfering tool axis and the deburring tool axis independent, it is easy to change / adjust the tooling from the machine front operation side. In addition, the combination of hobbing, chamfering and deburring reduces the line length and cycle time.


By installing a chamfering device underneath the hob head, it is possible to chamfer the part in the tooling area after hobbing and deburr the part in the open space. Additionally, the secondary burrs caused by deburring can be removed by re-hobbing. The removal of secondary burrs prevents the tooth flanks from getting damaged due to the hardened secondary burrs in the finishing processes such as gear grinding or honing, contributing to improved tool life. The combination of hobbing, chamfering and deburring reduces the line length. Also, it is possible to process a shaft gear.


<Milling Method by tracing using a carbide rotarty end mill>
The use of an auto part loader device enables chamfering during the hobbing process. Using the machine open space effectively, the rotating carbide end mills lightly touch the rotating part allowing chamfering for both top and bottom ends of the part. Chamfering is possible using the same rotarty end mill even if the part type is chgangred.


Hard Hobbing

Hard Hobbing is a finish hobbing process for hardened gears.

There are two kinds of Hard Hobbing processes that use carbide hobs. One is "Finish Hobbing" in which hardened gears are "finished" after the initial tooth cutting. The other is "Hardened Solid Gear Hobbing" where hardened solid gear blanks are finished hobbed.

Kashifuji has developed an Auto Part Orientation Device utilizing a special non-contact sensor that quickly and accurately orientates gear teeth to the hob tool.

Finish Hobbing


Hardened Solid Gear Hobbing


Auto Part Orientation Device



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.