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है”ह”ह

IS 6839-1 (1994): Glossary of terms relating to non-poweredmaterials handling equipment, Part 1 Castors and Wheels[MED 7: Material Handling Systems and Equipment]

IS6639(Partl):l!W4 IS0 -2163 : 1975

Indian Standard

GLOSSARY OF TERM~S RELATING TO NON-POWERED MATERIALS HANDLING

EQUIPMENT

PART 1 CASTORS AND WHEELS

( First Revision )

UDC 629.114.4.O,I2.3 : 621 868

OBIS 1994

BUREAU OF INDIAN STANDARDS MANAK -BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110 002

December 1994 Price Group 4

Non-Powered Materials Handling Equipment Sectional Committee, HMD 15

NATIONAL FOREWORD

This Indian Standard which is identical to IS0 2163 : 1975 ‘Industrial trucks - Wheels and castors-Vocabulary’ issued by Internaticxlal Organization for Standardization (ISO), was adopted by the Bureau of Indian Standards on the recommendation of the Non-Powered Materials Handling Equipment Sectional Committee (HMD 15) and approval of the Heavy Mechanical Engineering Division Council.

This standard was first published in 1973. Consequent upon the publicatidn of IS0 2163 : 1975, this standard has been revised by adopting IS0 2163 : 1975, in toto, to align its requirements with international practices.

The IS0 2163 : 1975 is a bilingual edition issued in English and French languages. Only the English language text in the International Standard has been retained while adopting in this Indian Standard.

The text of IS0 standard has been approved for publication as Indian Standard without deviations. Certain conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following:

Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

IS6839(Part1):1994 IS0 2163 : 1975

GLOSSARY OF TERMS RELATING TO NON-POWERED MATERIALS HANDLING

EQUIPMENT

PART 1 CASTORS AND WHEELS

( First Revision ) 1 SC&E AND FIELD OF APPUCATION

Thii International Standard deflnes terms relating to industrial wheets and castors.

2 H’lWSTRIAL WHEELS

2.1 industrial wheel : A wheel specially designed for non-powered industrial trucks and handling equipment, sack-trucks, hand-driven lift trucks and industrial trailers.

2.2 Wheel and its constituent parts

2.2.1 wheel : A revolving centre, rotating freely on an axle, either directly or with the use of antifriction bearings, and of which the external pan in contact with~the ground can be constituted by the material of the wheel itself or by various materials.

2.2.2 tread : The outer surface formation of a wheel or a tyre, in contact with the ground.

223 rim: The outer profile of a wheel.

lt can either be the tread in contact with the ground itself or receive a tyre.

2.2.4 tyte: The outer fitting on a wheel,the material of which can be diierent from the wheel material.

The tyre can be fixed or demountable.

@

. . . . .

1

IS6839(Partl):1994 IS0 2163 : 1975

2.2.5 hub: The central part of the wheel, bored to receive the axle, and machined if necessary to receive the bearing(s).

2.2.6 antifriction bearing: A device intended to make easier the rotation of a wheel or swivel around its axis; for example, bushings, spacer bushings, ball bearings, roller bearings, needle bearings, thrust washers, and the like.

2.3 Types oi wheels

The following are examples of some types of wheels in relation to their outer fiiings, and are chosen from those most frequently used.

2.3.1 bare wheel: A wheel (made of metal, plastics, rubber, etc.) used without any added tyre.

2.3.2 hoop wheel: A wheel, the rim of which is equipped with a tyre of a metal hoop whatever be the fitting process.

2.3.3 bonded tyred wheel: A wheel, the rim of which is equipped with atyre made of any type of material.

2

IS 6639 ( Part 1) : 1994 IS0 2163~: 1975

2.3.4 demountable tyre wheel: A tyre wheel, the tyre of which may be demounted; to this end, the wheel may be made of two separate parts.

2.3.5 press-ontyre wheel: A wheel on the rim of which is pressed a tyre made of either rubber or other-material.bonded to a steel band (a circular ring made of any type of material and with its inner diameter corresponding, with an interference tolerance, to the diameter of the rim).

2.3.6 semi-pneumatic tyred wheel: A wheel fitted with a removable tyre made so as to contain air without pressure.

3

IS6839(Part1):1994 IS0 2163 : 1975

2.3.7 pneumatic tyred wheel: A wheel fitted with a pressurized removabletyre(comprising an outer casing and an inner tube of rubber).

2.4 Principal characteristics

2.4.1 ~nominal diameter: The external diameter of the wheel.

2.4.2 hub length

2.4.3 bore: The nominal diameter of the hole machined in the hub, or the nominal inner diameter ofthe bearing(s) to receive the axle.

2.4.4 nominal load capacity (See IS0 2175.)

3 AXLE AND MOUNTINGS

3.1 axle: A circular sectional part on which the wheel may revolve either directly or with the use Of antifriction bearings.

This axle can be supported at both ends or be cantilevered.

3.1 .l stub axle: Cantilever end of an axle.

3.2 Mountings

3.2.1 fork mounting: An arrangement where the axle is supported on both sides of the wheel in its immediate vicinity.

4

IS6839(Part1):~1994 IS0 2163 : 1975

3.2.2 stub axle mounting: An arrangement where the wheel is cantilever mounted at the end of the axle.

-3.2.2

F3.1

4 INDUSTRIAL CASTORS

4.1 lndustrlal castor: An assembly including an industrial wheel mounted on an axle between-the two flanges of a non-rotating fork or a fork rotating, in respect to the mounting part of the vehicle.

Tread width

4.1 .l flxed bracket; fixed c&or: An assembly including a wheel mounted on an axle between the two flanges of a non-rotating fork, having a mounting qpart which can be a top-plate or a stem.

IS6839(Part1):1994 IS0 2163 : 1975

4.1.2 ewlvel castor: An assembly including a wheel mounted on an axle between the two flanges of an ‘Offset fork which can swivel freety. around a vertical geometw axis; with or without antifriction bearings, plain or otherwise. The swivel axis is fiied on a mounting part which can be a top-plate or a stem.

4.2 ConMituent parts of castors

4.2.1 fork: A part with two flanges through which the axle passes, and between which the wheel rriay revolve.

top-plate: Upper flat part of a castor or fixed bracket, having holes-or skis for mounting on ne.

6

IS6839(Partl):1!@4 IS0 2163 : 1975

4.2.3 atem: Vertical upper part of a castor or fiied bracket, intended to be fiied on one of the frame members (tube, etc.).

4.2.4 swhrel pin: Vertical axis around which may revolve the fork of a swivelling castor.

4.2.5 swhrel’ bearings:

a) precision bearings: Bearings~made to close tolerances in accordance with high grade bearing manufacturers’ practice, and replaceable as complete assemblies.

b) integral bearings: Antifriction bearings consisting of balls or rollers of uniform size operating directly in raceways formed or machined’into the castor fork and top-plate.

4.3 Princlfial characteristics

4.3.1 helght: Distance .H, measured vertically between the ground and the upper face of the top-plate (or the bottom neck of the stem) of a swivelling castor or fixed bracket.

4.3.2 offaet: Distance E, measured horiiontally between the geometrical axis-of the wheel and the geometrical swivel axis of a castor.

4.3.3 mrhrel radius: Radius R of the circle described by the outer edge of the wheel of a castor during its swivelling, measured from the geometric@ swivel axis of this circle.

7

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Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such a review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Handbook’ and ‘Standards Monthly Addition’.

This Indian Standard has been developed from Dot : No. HMD 15 ( 0775 1.

Amendments Issued Since Pablication

Amend No. Date of Issue Text Affected

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