Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

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“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

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“Step Out From the Old to the New”

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“The Right to Information, The Right to Live”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 7853 (1975): Surveyor, Cast, Dental [MHD 8: Dentistry]

IS : 7853 - 1975

Indian StandardSPECIFICATION FOR

SURVEYOR; CAST, DENTALDental Equipment Sectional Committee, CPDC 15

Chitmcur RsptcstYrting

DB Nounnr PXNYO-D~-ROEARIO Mini$st; $eEFlth & Family Planning ( DGHS ),

ManbeTsDB V. M. CHANDBAHAS

SEBX T . N . NAXAYANAX’Medident India (P) Ltd, Madras

KUTTY ( Alternate )PBOB T. N. CEAWLA In p~:e ,capacity ( Dental Colkge and ?&@ul,

D B H. M. DEOLAXIA Nair HospiLl & Dental College, BombayMAJ-GEN R. N. D~~BA Ministry of Defence ( DGAFMS )SHBZ F. G. DEESSENDOE~FEB Siemens India Ltd, Bombay

SHBI 0. PICK ( AI&mate )DB FALI S. MIEHTASass K. IL GEAI

Tate Institute of Fundamental Research_, BombayMinistry of Defence ( DGI ), New Delht

SKRI NIEXAL SIN~H ( Alternate )SEEI A. K. GOVANDE Messrs Select, Bombay

SHB~ B. M. MADAPPA ( Alternate )SEISU M. C. GUPTA International Dental Corporation, Lucknow

SH~I P. C. BAJPAI ( Alter+ )SHBI A. JEHANQKB Associated Dental & Medical Supply Co, Bombay

SEBI 0. P. PANTHAEY ( Alternate )PBSWIDIWY Dental Council of India, New DelhiDB RATAN H. DOCTOB Indian Dental Traders, Bombay

SEBI A. 0. CHOTIA ( Altemafc )SE.IU M. M. RAWAL Indo-Ceylon Dental & Surgical Co Ltd, Madras

Sass B. M. RAWAL ( Alternate )Saar R. ~~WJNDHIBABAJAN Directorate General of Technical Development,

New DelhiDE B. R. VACIXHER

D B Isaas SIN~H ( Altenrah)SHBI R N. Vm

SEBI D. N. Vro ( Alternate )SEBI Sax PBA~ASBA,

Director ( Consr Prods 8s MedInstrs )

Health 8s Family Planning Department, Governmentof Punjab, Chandigarh

ULTRADENT Private Ltd, Bombay

Director General, IS1 ( Ex-O@ Member )

SecretarySHBI C. N. N. IYENQAB

Assistant Director ( Consr Prods St Med Instrs ), IS1

@ Cqyight 1976INDIAN STANDARDS INSTITUTION

ThisOB

ublication is protected under the Indian Co&right Act ( XIV of 1957 ) andrepr uction in whole or in part by any means except with written permission of thepubliier shall be deemed to be an infringement of copyright under the said Act.

SPECIFICATION FORSURVEYOR, CAST, DENTAL

0 . F O R E W O R D

0.1 This Indian Standard was adopted by the Indian StandardsInstitution on 20 October 1975, after the draft finalized by the DentalEquipment Sectional Committee had been approved by the ConsumerProducts and Medical Instruments Division Council.

0.2 This standard is one of the series of Indian Standards on dentalequipment and instruments and has been formulated at the instance ofthe Advisory Committee for Development of Surgical Instruments,Equipment and Appliances, Government of India.

0.3 Surveyor, cast, dental, is used extensively by the dental profession.This standard covers functional requirements and is expected to help inproviding equipment of uniform quality consistent with ease of operation.

0.4 In the preparation of this standard, assistance has been derived fromGG-S-00805 a( DSA-DM ) ‘ Interim Federal Specification: Surveyordental clasp’, issued by Defence Personnel Support Centre, USA.

0.5 For the purpose of deciding whether a particular requirement ofthis standard is complied with, the final value, observed or calculated,expressing the result of a test, shall be rounded off in accordance withIS : 2-1960*. The number of significant places retained in the roundedoff value should be the same as that of the specified value in thisstandard.

1. SCOPE

1.1 This standard covers the dimensional and other requirements forcast surveyor for use in designing dental prosthesis.

*Ruler for rounding off numerical values ( noised ).

2

Is r’7853 - 1975

2. MATERIALS

2.1 The dental cast surveyor’s components shall be ~fabricated of thematerials given below. Material not specifically designated shall beentirely s&able for the purpose intended:-

SuroGyor Components

Base; tilt-top table ( top, mount,clamp ); upright column; survey-ing arm; locking screw knob

Locking screw for upright columncollar, washer; locking screwand cap for surveying spindle;2” and 6” taper tools; undercutgauge (large diameter )

Surveying spindle

Material

Aluminium alloy conform-ing toDesignation 4600 ofIS :617-1975*

Nickel-plated brass

Stainless steel conforming toDesignation 20Cr 13 or30Cr13 of IS : 1570(Part V)-1972t

SteelUndercut gauge (small diameter );upright column stud, washer,nut

Surveying rod and cylindricalblocking-out tools; coil spring

Surveying arm self-aligning ballbearings

SpFhtFk collet and three-jawed

Tilt-top table clamp transfer screwLiners for spindle ball bearing

bushing; tilt-top table lockingscrew; tilt-top table ball. bear-ing bushing

Spindle scribing rods .

ShoesAccessory tool and carbon rod

containersMetal protective sheath

Nickel-plated steel

Tempered steel

Heat-treated steel

Cadmium-plated steelBrass

CarbonRubberPlastics

Steel

*Specification for aluminium and aluminium alloy ingots and castings for generalengineering purposes ( second reoishn ) .

tSchedules for wrought steels: Part V Stainless and heat-resisting oteeio (firrtr&&a ) .

3

3. SHAPE AND DIMENSIONS

3.1 The essential dimensions of cast surveyoi shall conform to Fii. 1 to 3.

4. CONsTRUCTI0.N

4.1 The surveying spindle shall be machined and centreless ground toproduce a straight, concentric rod. The surveying spindle shall bemounted in selEaligning ball bearing bushings which shall be factorycentred in the cylindrical housing of the surveying arm. The lowerend ofthe spindle shall be drilled internally and threaded externally to receivethe threaded collet. The collet shall activate the three-jawed chuckused to hold the various interchangeable working tools. The upper endof the upright column and the lower end of the cylinder housing of thesurveying arm shall be machined to matching taper bearing surfaces.

4.2 The surveying spindle shall be perpendicular to the top surface ofthe surveyor base and shall have a runout not exceeding O-1270 mmwhen tested as specified in 6.

5. WORKMANSHIP AND FINISH

5.1 The cast surveyor shall be free from imperfictions which affect itsappearance or which may impair its serviceability. All surfaces, except forplated hardware components and those listed in 2, shall have ablack wrinkle, baked enamel finish. The top surface of the surveyorbase shall be machined, ground, lapped and sand-blasted. The bottomand outer rim surface of the tilt-top table mount shall be machined andpolished to provide easy movement over the top surface of the surveyorbase. The top surface of the tilt-top table shall be slightly roughenedand shall be scribed with a series of circles of uniformly increasing dia-meters. The matching taper, bearing surfaces of the surveying arm andupright column shall have a machined finish.

6. TESTS

6.1 Runout Test -The total indicated runout of the surveying spindleshall be measured to the nearest O-0254 mm. The spindle shall be heidin its housing and rotated slowly. A dial indicator sensitive to ~012 7 mm,equipped with a knife-edge foot or other suitable equipment of equalaccuracy shall be employed. If a dial indicator is used, it shall bemounted with a shaft perpendicular to the axis of the spindle and shall besopositioned that the foot contacts the spindle surface. The differencebetween the maximum and minimum readings for one full rotation ofthe spindle shall be taken as the total indicated runout.

7. MARKING7.1 Each-cast surveyor shall de permanently and legibly marked with the Imanufacturer’s name, initials or registered trade-mark.

.

4

IW553-B

75

d“

5

dTAPe+l TOOL CONTAINER M A R K I N G LEAD

c-_- 4 5 ,-d bIA 2-S

s’ TAPER TOOL

OlA2.S

CNLAROECI V I E W

UNDER CUT OAUW

SURVEYHO ROD

r OtA 2 . 5

I---

45

CYLINQERICAL BLOCKINOUT TOOL

All dimensions in millimetrea.

FQ, 2 DETAILS OF CONTAINER , MARKINQ LEAD AND Toou

All dimensions in millimetres.

FIG. 3 T ILT-TOP TABLE MOUNT

7.1.1 The cast surveyor may also be marked with the IS1 Certification-Mark.

NOTE - The use of the ISI Certification Mark is governed by the provisions of theIndian Standards Institution (Certification Marks) Act and the Rules and Regu-lations made thereunder. The IS1 Mark on products covered by an Indian Standardconveys the assurance that they have been produced to comply with the requirements-of that standard under a well-defined system of inspection, testing and qualitycontrol which is devised and supervised by IS1 and operated by the producer. IS1marked products are also continuously checked by IS1 for conformity to that standardas a further safeguard. Details of conditiona under which a licence for the use ofthe IS1 Certification Mark may be granted to manufacturers or processors, may beobtained from the Indian Standards Institution.

8. INSTRUCTIONS FOR USE AND MAINTENANCE

8.1 The cast surveyor shall be accompanied by instructions manualgiving adequate information regarding operation and maintenance.

9. PACKING

9.1 The cast surveyor shall be packed as agreed to between the purchaserand the supplier.