THAI~USTRLALSTANDARD

,tl8f). 1980 iatl 1- 2543

ISO 1797- 1 : 1992

(Amendment 1 : 1997)

., V.c!o ~!atl 1 : f)1').fYlrlli81f) &a11~

DENTAL ROTARY INSTRUMENTS-SHANKS-

PART I: SHANKS MADE OF METALS

ICS 11.060.20 ISBN 974-608-412-7

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mm. 1980 A"~ 1-2543

ISO 1797-1 : 1992

(Amendment 1 ; 1997)

Introduction

This International Standard is one of a series of basic standards ondental rotary instruments and constitutes an important link between thestandards on dental rotary instruments and those on dental handpieces.

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t!8fl. 1980 tat! 1-2543

ISO 1797-1 : 1992

(Amendment 1 : 1997)

Dental rotary instruments - Shanks

Part 1:Shanks made of metals

1 Scope

This International Standard specifies shanks ofdental rotary instruments and gives measurementmethods for the verification of the dimensions. Aquality control requirement is added in order to en-sure a high quality level.

Part 1 of ISO 1797 specifies shanks made of metalswhile part 2 specifies shanks made of plastics.

2 Normative references

The following standards contain provisions which,through reference in this text, constitute provisionsof this part of ISO 1797. At the time of publication,the editions indicated were valid. All standards aresubject to revision, and parties to agreements basedon this part of ISO 1797 are encouraged to investi-gate the possibility of applying the most recent edi-tions of the standards indicated below. Members ofIEC and ISO maintain registers of currently validInternational Standards.

ISO 3274:1975, Instruments for the measurement ofsurface roughness by the profile method - Contact(stylus) instruments of consecutive profile trans-formation - Contact profile meters, system M.

ISO 4288:1985, Rules and procedures for themeasurement of surface rouglmess using stylus in-struments.

ISO 6507-1:1982, Metallic materials - Hardness test- Vickers test - Part 1: HV5 to HV 100.

3 Classification

The shanks of dental rotary instruments are classi.fied into the following types, according to their di-ameters and design:

Type 1: diameter 2,35 mm with groove and flat;

Type 2: diameter 2.35 mm cylindrical;

Type 3: diameter 1,6 mm cylindrical with conicalor rounded end;

Type 4: diameter 3 mm cylindrical.

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)Jon. 1980 t'tt)J 1-2543

ISO 1797-1 : 1992

(Amendment 1 : 1997)

4 Symbols and terms

Symbols and terms are shown in figures 1 to 3 withthe following key:

dl diameter of shank

d2 diameter in the groove

s D-nat dimension

A-A

I, fitting length

12 shoulder to end length

13 shoulder to groove length

14 width of groove

I,

A

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Figure 1 - Type 1 shank

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Figure 2 - Type 2 and type 4 shank

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Figure 3 - Type 3 shank

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5 Requirements

5.1 Material

Shanks shall be made of metal materials such as,for example steel, carbide. The type of material andthe treatment given to it is at the discretion of themanufacturer.

A-A

...,o

00I

~

+ 0.1~ 1,35 -0,05

1

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Figure 5 - Type 2 shank

5.2 Dimensions

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1Jtm. 1980 nu,! 1-2543

ISO 1797-1 : 1992

(Amendment 1: 1997)

The dimensions and tolerances shall be. as shownin figures 4 to 7 and as given in table 1.

Dimensions are given in millimetres, surfaceroughness in micrometres.

The end of the shank for types 1, 2 and 4 shall beeither Oat, conical or rounded. The shape of the endshall be at the discretion of the manufacturer.

o2,7 -0,3

+ 0.051,8 0

A

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0.9t 0.05

Figure 4 - Type 1 shank

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0.5

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**)h7 .. -0.01

Figure 6 - Type 3 shank

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tl8f1. 1980 U1t11-2543

ISO 1797-1 : 1992

(Amendment 1 : 1997)

Figure 7 - Type 4 shank

Table 1 - Fitting length of shank

5.3 Surface roughness plugs, air gauges, or dial indicators, graduated indivisions of 0.001 mm.

The surface roughness, as determined by the meth-ods described in ISO 3274 and ISO 4288, shall be asspecified in figures 4 to 7.

The diameler dl shall be measured by traversing thelength '..

5.4 Hardness 7.2 Other dimensions

The hardness, for shanks made from steel or tung-sten carbide, as determined by the method specifiedin ISO 6507-1,shall be not less than 250 HV5.

Measurements shall be made using either appro-priate gauges with tungsten carbide faces, tungstencarbide-faced micrometer calipers, toolmakers'microscopes, or dial indicators.

6 Sampling 8 Quality control

The method of taking samples and the number ofinstruments needed for testing shall be the subjectof agreement between the interested parties.

8.1 Types of shanks

For the purpose of quality control, the shanks of theinstruments shall be classified as given in clause 3.

7 Test methods8.2 Defects

7.1 Shank diameters Major defects shall be those deviations from thespecifications listed in table 2. Minor defects shallbe all deviations in fitting dimensions not listed intable 2.

Measurements shall be made using either tungstencarbide ring gauges checked regularly with rnaling

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\.0....0

.(-.-------_._--- 00

I....&

I,

I, min.

Shanks types 1 and 3Diameter

Length of Instrument Shank Shanktype 2 type 4

miniature. short standard. long extra long

1,6 11 12 - -9

2,35 1111 1211 15 or 30 -

3 - - - - 15 or 30

1) Enlargement should not occur within I, = 13,5 mm.

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NOTES

JJon. 1980 Ii:lJJ1-2543

ISO 1797-1 : 1992

(Amendment 1 : 1997)

8.3 Acceptable quality level (AQL)

1 Major defects include only those items which preventan instrument from operating.

The acceptable quality level expressed in terms ofthe number of defects per 100 pieces, for each typeof instrument, shall be as shown in table 3.

2 Minor defects include all other deviations from thespeCification which lower the quality of the instrument.

Table 2 - Major defects

Table 3 - Acceptable quality level

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Shank d, dz 13 I. s

Type 1 >2,35 > 1,45 < 1,80 <0,85 > 1,80

Type 2 >2,35 - - - -

Type3> 1,60 - - - -< 1,59

Type4 >3 - - - -

MaJor defects Minor defectsShank

AQl AQl

Type 1 2,5 6,5

Type 2 2,5 6,5

Type 3 1,5 4,0

Type 4 2,5 6,5

aJ6fl. 1980 ttm 1-2543

ISO 1797-1 : 1992

(Amendment 1 : 1997)

Annex A(informative)

Bibliography

[1] ISO468:1982, Surface roughness - Par-ameters, their values and general rules forspecifying requirements.

[2] ISO 2859-1:1989, Sampling procedures for in-spection by attributes - Part 1:Sampling plansindexed by acceptablequality level (AQL) forlot-by-Iot inspection.

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mm.1980 &in. 1-2543

ISO 1797-1 : 1992

(Amendment 1 : 1997)

Dental rotary instruments - Shanks -

Part 1:Shanks made of metals

AMENDMENT 1

Page 4

After subclause 5.4 add the following subclause 5.5.

5.5 Marking

Marking, if envisaged, should be outside the fitting length 11.

If the marking is applied within the fitting length 11,the outside diameter of the marking shall not exceed the effectivediameter of the shank.

Marking shall be resistant to disinfection, cleaning and sterilization according to the manufacturer's instructions.

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