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News Release

April 13, 2020

DAIBEA BeginsMass Production of Ultra-High-PrecisionBall Bearing, PRECILENCE®

JDAIBEA Co., Ltd. (hereinafter "DAIBEA") has developed and begun mass production of PRECILENCE®, an ultra-high-precision bearing, in collaboration with JTEKT Corporation (hereinafter “JTEKT”).

1.Backgroundto Development

 

Due to its high precisionand availability, the P4S precision grade of the Germany’sDIN standard is widely used in high-precisionspindlebearingsof machine tools.

n recent years, however, with consideration to the growing demand for products supporting the advancement of machine tool accuracy, JTEKT Group has been working on the development ofbearings that exceed conventional products* in terms of precision, long life, quietness,etc., and has succeeded in manufacturing bearings equal to or higher than DIN standard "P4S" and "P2" bearingsthat realize "ultimate-precision" rotational performance at DAIBEA’s Izumi Plant.

*General commercial distribution P4S product


PRECILENCE®is a portmanteau of the words “precision” and “silence” and we will continue to expand this series of ultra-high precisionbearings under this brand.


A PRECILENCE bearing

[A PRECILENCE bearing]

*General commercial distribution P4S product


2.Features of Developed Product (P2bearing)

 

The new P2 bearing satisfiesthe five basic bearing performances (“rotates with high precision,” “rotates quietly,” “rotates fast,” “rotates lightly,” and “rotates for a prolonged period”) at an advanced level.


①Rotates with high precision(precision)

 Byexhaustively revising the precisionof all bearing components meticulously to match finished product performance, rotational precisionis approximately 1/4 compared to the conventional bearing.


②Rotates quietly (quietness)

 By finishing racewaysurface roughness extremely smoothly and further improving the dynamics of the balls and cage, shakingand vibration havebeen minimized, cutting vibration down to approximately 1/2 of the conventional bearing.


③Rotates fast(high speed)

 By newly adopting resilient high-nitrogen stainless steel for the bearing ring, the maximumrotational speed is approximately 30% greatercompared to when regular bearing steel is used.


④Rotates lightly (low torque)

 By significantly eliminating factors inhibiting rolling motion, rotating torque is approximately 30% less compared to the conventional bearing.


⑤Rotates for a prolonged period (long life)

 By intentionally not adopting balls withsmall diametersbelieved advantageous for high-speed rotation and instead adopting ceramic balls with large diameters,bearing life is approximately doublethe conventional bearing.


Comparison of the 5 basic performances

[Comparison of the 5 basic performances]



3.Results Upon Spindle Assembly

 

①Good assemblyperformance and higher rotating precision
Due to extremely high rotational precisionof the bearing, there is no need for phase adjustment of the maximum radial runout position, and an axial runout of ≦1μm is achieved with hardly any need to adjust spindle runout precision either.


②Reduced axial runout at high-speed rotation
Axial runout at a rotational speed of 30,000 min-1has been halved compared to a spindle assembled on a conventional bearing.

③Higher rotational speed
Maximum rotational speed is 35% higher than the conventionalbearing.


4.Sales Plan

 
Start of mass production : April 2020
Start of sales

: April 2020Began instant delivery sales forbearing numbers 7005Cthrough 7010Cand will gradually enhance lineup with different sizes.

Sales target :2 billion JPY by 2025
Customer

: Manufacturers of precision processing machines, manufacturers of semiconductor manufacturing equipment, space equipment industry, manufacturers of precision measuring instruments, etc.

Manufacturing plan

: DAIBEA Izumi Plant (plant dedicated to ultra-high-precisionbearings)



Reference information


About DINStandards
DIN Standards are national standards for the Federal Republic of Germany set by Deutsches Institut für Normung(DIN, English translation: German Institute for Standardization).DIN Standards are used widely as reference, not only in Germany but also internationally.


Comparison of DIN 620and JIS1514equivalence

DIN Normal
Class
Class P6 Class P5 Class P4 Class P4S Class P2
JIS Class 0 Class 6 Class 5 Class 4 Class P2
Usage level General class Precision High-end Ultra-precision

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