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As a linear bearings manufacturer, NB is serving a variety of customers in many industries such as general machinery, semiconductor equipment, special purpose machines.
The NB SPINDLE is a further contribution to the industry. From parts to the spindle unit NB conducts integrated production through total manufacturing.
Please contact us for any requirement.

ロールシャフト

NB SPINDLE is backed by expertise gained from decades of experience in high accuracy machining.

ロールシャフトNB keeps supplying high quality products through skilled labor with time-nurtured skills, time-tested production process and technology, in addition to a help of the state-of-the art technology and equipment.
We have a belief that high processing technology is the key to customer-satisfaction.



Outer Surface Machining Range
Maximum diameter 650mm
Maximum length 6000mm
Surface roughness Ra0.4
Straightness customer specification
Concentricity customer specification
Perpendicularity customer specification
Cylindricity customer specification
Internal Surface Grinding straight or tapered internal portion
Deep Hole Machining
Hole diameter Maximum length
one side through hole
Φ2~2.5mm 200 400
Φ3~3.5mm 300 600
Φ4~8mm 500 1000
Φ9~10mm 750 1500
Φ10~32mm 850 1700
Φ30~80mm 2000 4000
Screw Grinding triangular and trapezoidal screws
Matched parts special nuts to match a given shaft, tapered portion of inner or outer diameter to match a given shaft or bearing
General machining center tapping, step machining, V-groove machining, screw machining, plate-groove machining, key-groove machining, flat surface machining, spot hardening
Surface Treatment industrial chrome plating, low temperature black chrome treatment, other customer request
Thermal-spraying Ceramic-coating (best-suitable for parts that require wear and corrosion resistance)
(1) standard material
high carbon chromium bearing steel (SUJ2)
chrome molybdenum steel (SCM415, 435)
carbon steel for machinery (S45C)
martensite stainless steel (equivalent to SUS440C )
austenite stainless steel (SUS303, 304)
steel alloy for tools (SKS3, SK4)
aluminum chrome molybdenum steel (SACM645)
(2) standard ceramic for thermal-spraying
main component: TiO2 titanium dioxide
specific gravity: 4.7
hardness: 58HRC or more
maximum temperature: 540℃
color: black
fine surface finish by grinding

In response to customer requirements, NB provides total manufacturing from the receipt of drawing to final inspection. Total manufacturing includes process planning, material procurement, turning, heat-treatment, milling, surface treatment and grinding.

Process Chart (standard example)

図面検討
Drawing

NC旋盤
NC Lathe

BTA加工機
BTA Boring Machine

CNC内面研削盤
CNC Internal Grinding Machine

Inspection room is set at 22+/-1℃ to ensure accurate inspection.


High Precision Machining and Inspection Technology lead to the Final Inspection.

To ensure accuracy it is necessary to have skilled operators and inspectors at the same time. Skilled inspectors perform reliable measuring skills on the finished products.


Constant Temperature Room

Quality is assured with 3-D measuring machine, shape measuring machine, circularity measuring machine, etc. in the constant temperature room.

室温を厳重管理
Temperature is strictly monitored

三次元測定機
Coordinate Measuring Machine

真円度測定機
Circularity Measuring Machine
各種測定機及びゲージ類
Measuring Devices and Gauges

In order to answer every requirement from the customer, NB invest in the equipment. Following are a part of machines at hand.

CNC旋盤
CNC Lathe


CNC横中ぐりフライス盤
CNC Horizontal Boring and Milling Machine


テーブル形CNC横中ぐりフライス盤
CNC Horizontal Boring and Milling
Machine with Sliding Table


立形マシニングセンタ
Vertical Machining Center



Balancing Machine
円筒研削盤
Cylindrical Grinding Machine


円筒研削盤
Cylindrical Grinding Machine


CNC立形研削盤
CNC Vertical Grinding Machine


CNC内面研削盤
CNC Internal Grinding Machine

精密内面研削盤
Precision Internal Grinding Machine


A volume production is possible?
Yes, we will do volume production. Please contact us.
Which materials can you machine?
Standard materials are:
high carbon chromium bearing steel (SUJ2)
chrome molybdenum steel (SCM415, 435)
carbon steel for machinery (S45C)
martensite stainless steel (equivalent to SUS440C )
austenite stainless steel (SUS303, 304)
steel alloy for tools (SKS3, SK4)
aluminum chrome molybdenum steel (SACM645)

Please contact us for other materials.
Is it possible to grind stainlesss steel?
Yes, it is. Non-magnetic austenite stainless steel (SUS303, 304, 316) and martensite stainless steel (equivalent to SUS440C ) are examples.
Please contact us for other materials.
Is it possible to grind aluminum?
Sorry, we cannot.
Inspection sheet is available?
We ship the final product with an inspection sheet. Please advise us the necessary inspection items on ordering.
Screw grinding is possible?
We can handle threading (triangular and trapezoidal screws). We welcome total machining including threading.
What kind of surface treatment is available?
Standard treatment are:
industrial chrome plating
electroless nickel plating
black oxide
low temperature black chrome treatment (with fluoride coating)

Please contact us for other treatment.
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