NSK VR-EB User manual

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1. User and Indications for Use
Users: Dental Technicians and Dentists
Indications for Use: For use in Dental Laboratories for cutting and polishing
2. Precautions for handling and operation
Please read these precautions carefully and use only as intended or instructed.
Safety instructions are intended to avoid potential hazards that could result in personal injury or damage to the device.
Safety instructions are classified as follows in accordance with the seriousness of the risk.
Class Degree of Risk
WARNING Hazard that could result in serious injury or damage to the device if the safety instructions are not
correctly followed.
CAUTION Hazard that could result in light or moderate injury or damage to the device if the safety instructions
are not correctly followed.
NOTICE General product specification information highlighted to avoid product malfunction and performance
reduction.
ENGLISH

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CAUTION
ŘThe product must be used by a person who has received professional instruction as a health care provider, such as a dental
technician or dental physician, in a dental clinic, hospital or other medical institution.
ŘUsers are responsible for the operational control, maintenance and continual inspection of this product.

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CAUTION
ŘRotate the bur to check for vibrations, noise, or temperature (heat) being emitted. Should the Handpiece function abnormally
at this time, stop using it immediately and contact your Authorized NSK Dealer. (Refer to “6. Checking the Handpiece Before
Each Use”)
ŘDo not disassemble or alter the handpiece except as recommended by NSK in this Operation Manual.
ŘDo not allow any impact on to the product. Do not drop the product.
ŘOperators and all others in the area must wear eye protection, a mask, and gloves when operating the Handpiece.
ŘOperate the Handpiece at speeds under the maximum rotation speed of 35,000min–1.
ŘWhen using a bur with a large cutting blade (4mm or larger in diameter), use it at as low a rotation speed as possible.
ŘDo not use burs with problems listed below as the bur may break, seize up or disengage from the chuck.
– Bent, deformed, worn, rusted, broken, deficient bur.
– Bur which is cracked on the edge or axis.
– Non-ISO (EN ISO) standard, or tampered bur.
ŘAlways keep the bur shank clean. Debris in the chuck could cause poor bur concentricity or low chuck retention force.
ŘAlways insert the bur all the way into the chuck. If insertion is insufficient, premature failure of the handpiece head bearings,
or accidental release of the bur, may occur.

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CAUTION
ŘAlways follow the instructions provided by the bur manufacturer.
ŘWhen a bur is rotating, do not turn the bur lock ring in the direction. Doing so will cause the Handpiece to break.
Particularly when replacing a bur, do so after rotation has completely stopped.
ŘShould the handpiece function abnormally during use, stop using the handpiece immediately and contact your Authorized NSK
Dealer.
ŘClean the Handpiece on a timely basis. Follow the procedure in “7. Post-use Maintenance” in the Operation Manual to perform
cleaning.
ŘDo not use the following fluids to wipe, immerse or clean the product; strong / super acid water, strong acid / alkaline
chemicals, chlorine-containing solutions, solvents such as benzine or thinner.
ŘDo not lubricate the Motor Handpiece with oil. Doing so might cause it to generate heat or malfunction.
ŘPerform regular function and maintenance checks. (Refer to “8. Periodical Maintenance Checks”)
ŘIf the handpiece has not been used for a long period, rotate the handpiece and check for noise, vibration and overheating
before use.
ŘTo avoid clinical downtime it is recommended that a spare be kept on hand in case of a breakdown during treatment.

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NOTICE
ŘKeep a cutting bur or test bur attached even when the product is not in use.
ŘContact your Authorized NSK Dealer if the product fails.
3. Accessory List
No. Name Quantity
1 Wrench for Adjusting Chuck 1

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4. Connecting and Disconnecting the Handpiece from the Motor
4-1 Connecting
1) Insert the handpiece direct into the motor (Fig. 1). When
connecting an optic handpiece, turn the handpiece until it clicks
and locks into position.
2) Confirm that the handpiece is securely connected to the motor.
4-2 Disconnecting
Hold the motor and the handpiece, then pull apart.
Insertion Area
Handpiece Motor
Fig. 1
CAUTION
ŘDo not connect or disconnect the handpiece until the motor has completely stopped.
ŘConnect ONLY to E type motors (ISO 3964 (EN ISO 3964)).

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5. Inserting and Removing the Bur
5-1 Removing the Bur
1) Turn the bur lock ring in the direction until it clicks to loosen the chuck.
2) Pull out the bur.
5-2 Inserting the Bur
1) Insert the bur in all the way.
2) Turn the bur lock ring in the direction until it clicks to tighten the chuck.
After attaching the bur, pull it back and forth to confirm that it is connected
securely.
Bur Lock RingChuck Open
Open
Closed
Closed
Fig. 2

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CAUTION
ŘWhen using a bur with a large cutting blade (4 mm or larger in diameter), use it at as low a rotation speed as possible.
ŘAlways keep the bur shank clean. Debris in the chuck could cause poor bur concentricity or low chuck retention force.
ŘAlways insert the bur all the way into the chuck. If insertion is insufficient, premature failure of the handpiece head bearings,
or accidental release of the bur, may occur.
ŘAlways follow the instructions provided by the bur manufacturer.
ŘWhen a bur is rotating, do not turn the bur lock ring in the OPEN direction. Doing so will cause the Handpiece to break.
Particularly when replacing a bur, do so after rotation has completely stopped.
6. Checking the Handpiece Before Each Use
Before using the product, rotate the bur to perform an inspection. If you notice a problem such as bur instability, vibrations,
generation of heat, or abnormal sounds during an inspection or use of the product, cease operation immediately and contact your
Authorized NSK Dealer.

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7. Post-use Maintenance
Perform the following maintenance after use.
7-1 Preparation
1) Remove the bur.
2) Disconnect the handpiece from the motor.
3) Wipe the surface of the Handpiece with a damp cloth, and then wipe it with a cloth
dampened with rubbing alcohol, etc.
7-2 Cleaning and Replacing the Chuck
7-2-1 Removing the Chuck
1) Turn the bur lock ring to the OPEN position.
2) Turn the chuck counterclockwise with the included wrench for adjusting chuck
(Fig. 3).
Loosen
Fig. 3

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3) Remove the chuck (Fig. 4).
7-2-2 Cleaning the Chuck
In order to maintain the precision of the chuck, remove it regularly for cleaning with
an ultrasonic cleaner, etc. It is recommended that you clean it at least once a week
to ensure the product can be used safely. Chuck
Fig. 4
CAUTION
ŘNeglecting to clean the chuck for a long time is very dangerous because wax, gypsum, etc., will accumulate in the chuck,
causing the bur to be insecure and causing runout.

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7-2-3 Attaching the Chuck
1) Turn the bur lock ring to the OPEN position.
2) Push the chuck in all the way with a bur inserted.
3) Turn the chuck clockwise with your finger until it stops (Fig. 5).
Then lock the bur lock ring to hold the bur securely.
Fig. 5
Until it stops
CAUTION
ŘAfter attaching the chuck, pull it back and forth to confirm that it is connected securely.
NOTICE
ŘApply a thin layer of oil to the chuck before insertion.

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8. Periodical Maintenance Checks
Every 3 months perform periodical maintenance checks, referring to the check sheet below. If any abnormalities are found, contact
your Authorized NSK Dealer.
Points to check Details
Rotation Rotate the handpiece and check for abnormalities such as abnormal rotation, vibration,
noise, and overheating.

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9. Problems and Solutions
Problem Cause Solution
The bur does not rotate with the bur lock
ring closed.
The ball bearings have burned out or
have foreign material inside them.
Contact your Authorized NSK Dealer.*
Heat is emitted during rotation. There is wear on the ball bearings due to
foreign material inside them.
Contact your Authorized NSK Dealer.*
Vibrations/noise is emitted during
rotation.
There is wear on the ball bearings due to
foreign material inside them.
Contact your Authorized NSK Dealer.*
A curved bur was used. Replace the bur.
The bur has poor concentricity. Foreign material may be attached to the
inside of the chuck.
Clean the inside of the chuck.
The chuck is worn. Replace the chuck.
The ball bearings are worn. Contact your Authorized NSK Dealer.*

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Problem Cause Solution
The bur disconnects. The chuck is loose. Tighten the chuck.
*The product cannot be repaired at a dental clinic, etc.
10. Specifications
Model VR-EB
Max. Rotation Speed (Motor) 35,000min–1
Max. Rotation Speed (Handpiece) 35,000min–1
Bur Type ISO 1797-1 (EN ISO 1797-1) Type2 ø2.35mm HP Bur
Use Environment Temperature: 10 - 40°C, Humidity: 30 - 75% (No Condensation)
Transportation and Store Environment Temperature -10 - 50°C, Humidity: 10 - 85%, Pressure: 500 - 1,060hPa

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11. Symbol
Conforms to CE European Directive.
Manufacturer.
Authorized representative in the European community.
12. Warranty
NSK products are warranted against manufacturing errors and defects in materials. NSK reserves the right to analyze and determine
the cause of any problem. Warranty is voided should the product be not used correctly or for the intended purpose or has been
tampered with by unqualified personnel or has had non NSK parts installed. Replacement parts are available for seven years beyond
discontinuation of the model.

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13. Spare Parts List
Model Order Code
Chuck-2.35A H203A180A
Wrench for Adjusting Chuck K015751
14. Disposing product
In order to avoid the health risks of operators handling the disposal of medical equipment, as well as the risks of environmental
contamination caused thereof, a surgeon or a dentist is required to confirm the equipment is sterile. Ask specialist firms who are
licensed to dispose of specially controlled industrial wastes, to dispose the product for you.

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1. Benutzer und Verwendungszweck
Benutzer: Zahntechnikern und Zahnärzten
Anwendungshinweise: Diese Vorrichtung dient der Übertragung von Rotation, die aus einer Energiequelle stammt, wodurch ein Instrument wie zum
Beipiel ein Fräser angetrieben wird, um ein einem Dentallabor künstliche Zähne (Zahnersatz) zu Schneiden und zu Polieren.
2. Sicherheitsanweisungen für die Handhabung und Bedienung
Lesen Sie bitte diese Sicherheitsanweisungen aufmerksam durch und benutzen Sie das Gerät ausschließlich gemäß seines
bestimmungsgemäßen Gebrauchs und entsprechend der Anweisungen.
Die Sicherheitsanweisungen sind dafür vorgesehen, mögliche Gefahren zu verhindern, die Körperverletzungen oder
Beschädigungen am Gerät verursachen können.
Die Sicherheitsanweisungen werden gemäß der Schwere des Risikos wie folgt klassifiziert.
KLASSE Ausmaß und Schwere der Gefährdung oder Schädigung
ACHTUNG Risiko, das zu schweren Verletzungen oder Schäden am Gerät führen kann, wenn die
Sicherheitshinweise nicht beachtet werden.
VORSICHT Ein mögliches Risiko, das zu leichten bis mittleren Personen- oder Sachschäden führen kann, wenn die
Sicherheitshinweise nicht beachtet werden.
HINWEIS Allgemeine Produktinformationen, die besonders hervorgehoben werden, um Störungen oder
Leistungsminderungen zu vermeiden.
DEUTSCH