Slide 1: Minebea Technical Conference: HDD Spindle Motor & Bearing
MINEBEA Technical Conference ～HDD Spindle Motor & Bearing～ March 24, 2000 0
Slide 2: Contents
Contents １．HDD Spindle Motor Business - Current Prospect ２．RO Bearing Motor - Performance and Advantage ３．Fluid Dynamic Bearing - Minebea Strategy ４．Fluid Dynamic Bearing - Impact to Ball Bearing Business ５．RO Bearing - Future Application ６．Minebea Production Support and It’s Organization ７．Summary
Slide 3: HDD Spindle Motor Business - Current Prospect
１． HDD Spindle Motor Business - Current Prospect 2003 10,000Kpcs / Month 1,500K 500K 1,600K 300K 1,400K 1,000K 1,200K 1,000K 2001 CQ3 5,000Kpcs / Month 2000 CQ3 3,500Kpcs / Month 3.5-inch Lowend, 65K Desktop PC/STB 450K 3.5-inch Highend, 3K 1,958K Desktop PC 550K 2.5-inch Mobile 1999 CQ1 1,147K 2,02
Slide 4: HDD Spindle Motor Forecast
１．HDD Spindle Motor Business - Current Prospect HDD Spindle Motor Forcast 400,000K 330,000K Shipping Quantity [pcs] 350,000K Others 272,000K 300,000K Minebea 240,000K 250,000K 189,000K 200,000K 140,400K 36% 150,000K 114,600K 117,600K 30% 100,000K 25% 21% 50,000K 20% 13% 14% 0K 1997 1998 1999 2000 20
Slide 5: Structure of RO Bearing
２． RO Bearing Motor – Performance and Advantage Stracture of RO Bearing Preload Floating inner ring Balls + Cage Motor hub Outer ring with two raceways Shaft with integrated raceway 4 An RO bearing is composed of one outer ring with two raceways, one shaft with one raceway, and one inner ring with o
Slide 6: RO Bearing Motor Performance: Thermal Resonance and Runout
２． RO Bearing Motor – Performance and Advantage Graph A Thermal ( 20°C ～ 60°C ) Resonance Shift 12.0 RO Bearing Motor Discrete Bearing Motor 10.0 10.0Hz RO discrete Resonance Shift [Hz] 8.0 6.0 6.1Hz 4.0 2.0 0.0 RO Bearing Motor Discrete Bearing Motor Graph B Graph C Resonance Range ( Max. ～ Min. )
Slide 7: 2.5 inch Spindle Motor Performance
２． RO Bearing Motor – Performance and Advantage 2.5 inch Spindle Motor Performance Resonance Range ( @25°C ) 25.0 Resonance Range [Hz] 20.0 15.0 23.2Hz 10.0 5.0 11.8Hz 0.0 RO-Bearing Motor Discrete Bearing Motor NRRO, Axial, With Disk, OverAll 0.6 NRRO, Axial [μm] 0.5 0.4 0.3 0.40μm 0.55μm 0.2 0.1 ～
Slide 8: Technical Problem of Ball Bearings with Ceramic Balls
２． RO Bearing Motor – Performance and Advantage Technical Problem of Ball Bearings with Ceramic Balls Loosing of Preload Ball Bearing with Steel Balls: Same Ball and Ring Materials => Same Thermal Expansion No Preload Loosing Problem in Temperature Variation Ball Bearing with Ceramic Balls: Differen
Slide 9: Prevention of the Loosing Preload in RO Bearing with Ceramic Balls
２． RO Bearing Motor – Performance and Advantage Prevention of the Loosing Preload in RO Bearing with Ceramic Balls Room Temperature High Temperature 8 When assembled into a motor, the outer ring of RO Bearing is compressed as shown in the above figure. This assembling method prevents the problem of
Slide 10: Principle of Compensating the Preload
２． RO Bearing Motor – Performance and Advantage Principle of Compensating the Preload 9 In the case of RO bearing, pre-load is retained even when its outer ring is elongated due to a rise of temperature, since the compression of the outer ring is released to the longitudinal direction. The contact a
Slide 11: Difficulty of Retaining the Preload in Discrete Ball Bearings
２． RO Bearing Motor – Performance and Advantage Difficulty of Retaining the Preload in Discrete Ball Bearings with Ceramic Balls NO Compression of Spacer Compression of Outer Ring 10 In the case of discrete ball bearings with Ceramic Balls, the same principle to prevent the loosing of preload is not
Slide 12: Projection of RO Bearing Motor Production
２． RO Bearing Motor – Performance and Advantage Projection of RO Bearing Motor Production RO- Bearing Discrete 61% Bearing 2000 CQ3 RO- Discrete 3,500Kpcs / Month Bearing Bearing 45% 2000 April 2,150Kpcs / Month 11 All of our spindle motors for 2.5-inch and 3.5-inch, highend desktop HDDs use RO bear
Slide 13: Cost is a Key to the Success in FDB Business
３． Fluid Dynamic Bearing – Minebea Strategy Reality Sales talk ・ Low Cost Contradiction ・High Cost ・Questionable ・Good Performance reliability NRRO/Noise/ Burr/Contamination Speed Oil Leakage Cost is a Key to the Success in FDB Business. 12 The number of components used in fluid dynamic bearings are
Slide 14: FDB developed by Seagate
３． Fluid Dynamic Bearing – Minebea Strategy FDB developed by Seagate Capital expenditure： 2 Ball Bearings + 1 Shaft > 1 FDB (Greater than) Reliability: Excellent Design and know-how (Burr Free, less Contamination and No Oil Leakage) 13 The fluid dynamic bearing developed by Seagate Technologies Inc.
Slide 15: Capital expenditure for Additional HDD Spindle Motor Production Capacity
３．Fluid Dynamic Bearing – Minebea Strategy Capital expenditure for Additional HDD Spindle Motor Production Capacity Additional Capacity Existing capacity 4Mil. Units/Month ＋ 6Mil. Units/Month at ¥7.5 Billion 10Mil. Units/Month FDB Mass production starts within year 2000 14 We will start the mass pro
Slide 16: Spindle Motor Performance Comparison by Bearing Types
３．Fluid Dynamic Bearing – Minebea Strategy Spindle Motor Performance Comparison by Bearing Types Non Minebea’s Discrete RO FDB NRRO △ ○ ◎ Life, High Speed Rotation △ ○ ◎ Acoustic Noise ○ ○ ◎ Load Carrying Capacity ◎ ◎ △ Torque ○ ○ ？ Shock Torrelance ○ ○ ？ Thermal Characteristics ○ ◎ ？ Cost Advantage
Slide 17: Spindle Motor Performance Comparison by Bearing Types (Minebea's FDB)
３．Fluid Dynamic Bearing – Minebea Strategy Spindle Motor Performance Comparison by Bearing Types Minebea’s Discrete RO FDB NRRO △ ○ ◎ Life, High Speed Rotation △ ○ ◎ Acoustic Noise ○ ○ ◎ Load Carrying Capacity ◎ ◎ △ Torque ○ ○ ○ Shock Torrelance ○ ○ ○ Thermal Characteristics ○ ◎ ○ Cost Advantage ◎ ◎
Slide 18: Ball Bearing Sales Results & Forecast
4. Fluid Dynamic Bearing – Minebea Strategy Ball Bearing Sales Results & Forecast 140,000K Results Forecast P/O received November 1999 130,000K 126,417Kpcs Quantity / M onth [ pcs ] 120,000K February 2000 121,264 110,000K 100,000K 90,000K Mar-98 Jun-98 Mar-99 Jun-99 Mar-00 Jun-00 Sep-98 Dec-98 Sep-9
Slide 19: RO Bearing Future Application: Precision Pivot Assy.
５. RO Bearing – Future Application Eg.１：Precision Pivot Assy. Though we now have a strong demand of RO Bearing for HDD Spindle Motors, we will explore new applications. NRRO, Radial, OverAll RRO, Radial, OverAll 0.25 6.0 NRRO, Radial [μm] 5.0 RRO, Radial [μm] 0.20 4.0 0.15 3.0 4.52μm, 0.10 0.21μm, A
Slide 20: Pivot Assy Sales Results & Forecast
５. RO Bearing – Future Application 12,000K Pivot Assy Sales Results & Forecast Results Forecast P/O received October 1999 10,000K 9,480Kpcs Quantity / Month [ pcs ] 8,000K February 2000 8,335Kpcs 6,000K 4,000K Jun-98 Jun-99 Jun-00 Mar-98 Sep-98 Dec-98 Mar-99 Sep-99 Dec-99 Mar-00 Sep-00 19 We expect
Slide 21: RO Bearing Fan Motor
５. RO Bearing – Future Application RO Bearing Fan Motor - Ultra High Performance & High Reliability - Casing Yoke RO Bearing Impeller 20 We consider ultrahigh performance, highly reliable fan motors as the next application area for RO bearings. We can obtain the stable rotation of fan motors by usin
Slide 22: Minebea Production Support and Its Organization
６．Minebea Production Support and It’s Organization Motor Engineer ：９２ Thailand R&D Engineer ：５３ 15 •Mass Production R&D Germany Japan •Planning •Clean Technology •Product Design 53 57 20 •Product Development •Product Design •Material Science •Tool/Equipment Development •Product Development •Tribolog
Slide 23: Production Support: R&D and Mass Production Sites
６．Minebea Production Support and It’s Organization R&D Mass-Production Japan Su p Thailand Germany port Thailand Sample Production Thailand Germany Japan Singapore Design & Development Germany Japan Planning Japan 22 We are engaged in the design and development of HDD spindle motors in both Japan an
Slide 24: Summary
７．Summary １．Minebea HDD Spindle Motor expects Strong Demand and Steep Growth. ２．Minebea HDD Spindle Motor continues to use RO Bearing because of its Superior Performance. ３．Minebea FDB has Advantages in both Cost and Reliability. ４．FDB does not Affect has Minebea’s Current Ball Bearing Business. ５．R