NEW PRODUCTG1 Series Small Cylindrical Grinding Machines
The rapid electrification of automobiles in recent years
has brought significant changes to customer needs inregard to machine tools. There are also extremely highdemands for carbon neutrality. These circumstances
made it necessary for JTEKT to restructure its external
cylindrical grinder to enable the optimal machines to beprovided to all markets and all customers.
Our newly developed “G1 Series” of small external
cylindrical grinding machines features five types that canbe selected based on the application.

Aim of Development
Our aim is to provide quality products to as many customers as possible at an affordable price. Over its 80 year history,
JTEKT has manufactured and sold various grinding machines, from general-purpose to mass-produced and specialpurpose machines, and is proud its contributions, mainly to the development of automotive industries around the world.
This time, JTEKT has set its sights on realizing a high-quality, low-cost external cylindrical grinding machine that isboth easier to use and obtain and which inherits the superior reliability of our previous grinding machines while featuring
enhanced functions to meet the needs of a diverse array of customers. With five types to choose from depending on theapplication, our “G1 Series” features various models, from those designed to provide extreme levels of productivity duringmass production to those designed for craftsmanship at the submicron level.
For efficient productionof several types
of workpieces
For shorter cycle times

For a quality
machine ata reasonable priceFor general,
non-skilled use

Mass production

For submicron
accuracy

Small lot

Type Racing

Type Sports

Type BasicType General

Type Luxury

Unprecedentedproductivity

An all-arounder

When simple is best

Enables anyone toeasily performskilled machining

Extremely
high quality

Five types can be selected based on the application

JTEKT’s restructured line of external cylindrical grinding machines

Features
1. Outstanding Quality
To achieve the desired level of precision at all times,
we focused on the functions necessary for grinding,which are “grabbing,” “rotating,” and “grinding.”
We also minimized the three undesirable elements of“deformation,” “vibration,” and “thermal displacement.”
This time, by using the latest combined analysis
methods, we have succeeded in developing a platformthat minimizes deformation and thermal displacement,
and which reduces workpiece dimensional changes to1/3 that of conventional grinding machines. We have also
added a low-vibration rolling-bearing grinding wheel
spindle to our range of available grinding wheel spindles
which features both our long popular and highly reliable
fluid bearings, as well as JTEKT’s high-precision, highrigidity bearings.

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NEW PRODUCT
2. Unprecedented Productivity

4. Carbon Neutrality

In order to provide the fastest grinding machinepossible, we focused on enhancing grinding speed while
reducing wasted time, which are the keys to achieving
high productivity in the automotive industry. To ourrange of available CBN grinding wheels, we have addeda grinding wheel with a circumferential speed of 120 m/s
that is capable of superior grinding speed.
We have also developed the fastest work changer
ever, the “XC,” which enables extreme reductions inmachine downtime. Because machined workpieces
are instantaneously switched out for an unmachined
workpiece once machining has been completed, andbecause the machining cycle and loading/unloading
cycle are performed in parallel, workpiece loading andunloading times are almost reduced to zero.

We are working to help realize a decarbonizedsociety by reducing power consumption during machine
downtime and operation, which leads to decreased CO2
emissions from customer production plants. In order toreduce standby energy during machine downtime, wehave provided our grinding machine with “Sleep In” and“Wake Up” functions.

Loader hand

Reduced power consumption during machine downtime
Servomotor/PumpOffAir Purging
OffPowerconsumption

Ungroundworkpiece
Unground workpiece

Carbon Neutrality

Coolant
ON

75% reduction inGrinding Wheel Spindle
ONpower consumption

Operation During lunch breaks/between shifts Operation

XC

Ground workpiece

XC

3. Excellent Operability
Designed for beginner and experienced operators alike,our grinding machines feature the superior operability
and abundant functions that operators expect fromsuch machines. They also feature an operator-friendlymechanical structure that provides excellent operability
and workability during all work stages, from setup tomaintenance.
Operators can choose from up to 16 patterns of grinding
cycles, which have been designed using the expertise
accumulated in unison with our customers over JTEKT’s
80 year history. Furthermore, the distance the operator
needs to move when changing the grinding wheel
has been shortened from the conventional 300mm to50mm. This has resulted in improved grinding wheel
accessibility. We made this improvement as part of ouraim to develop a machine that anyone can use safely
and comfortably without having to perform work in an
uncomfortable posture.

Together with our group company, JTEKT GrindingTools Corporation, we have developed a new CBN
grinding wheel named “SAKURA” that is designed tominimize power consumption during machine operation
by reducing grinding resistance. Combining these has
enabled us to reduce CO2 emissions by approximately 8
tons per year.
(Machine Tools Engineering Dept., Machine Tools &Manufacturing Systems Business Unit)

JTEKT CORPORATION
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