DRAFT UGANDA 
STANDARD  
  DUS DEAS 1021 -1 
 
First  Edition  
2019-mm-dd 
 
 Reference number  
DUS DEAS 1021 -1: 2019  
 
© UNBS 2019 
   
Hammer — Specification — Part 1: Steel hammerhead  
 
 
DRAFT STANDARD FOR PUBLIC REVIEWDUS DEAS 1021 -1: 2019  
ii                © UNBS  2019 - All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2019  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior writte n 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 7 333 2 50/1/2 
Fax: +256 41 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 
DRAFT STANDARD FOR PUBLIC REVIEWDUS DEAS 1021 -1: 2019  
© UNBS  2019 - All rights reserved                 iii National foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, as amended.  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisatio n for Standardisation (ISO),  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT A greement of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments befo re recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Uganda Standard, US EAS 1021 -1: 2019 , Hammer — Specification — Part 1: Steel hammerhead , is 
identical with and has been reproduced from an East African  Standard, EAS 1021 -1: 2019 , Hammer — 
Specification — Part 1: Steel hammerhead , and adopted  as a Uganda Standard.  
The committee responsible for this document is Technical Committee UNBS/TC 4, Mechanical engineering 
and m etallurgy . 
Where ver the words, “ East African  Standard " appear, they should be replaced by "Uganda Standard."  
DRAFT STANDARD FOR PUBLIC REVIEW DEAS 1021 -1:2019  
ICS 25.130.40  
 
 
© EAC 201 9                                                                                                                               First Edition 201 9 DRAFT EAST AFRICAN STANDARD  
Hammer  — Specification  — Part 1: Steel hammer head  
EAST AFRICAN COMMUNITY  
DRAFT STANDARD FOR PUBLIC REVIEWDRAFT STANDARD FOR PUBLIC REVIEWDEAS 1021 -1:2019  
ii © EAC 2019  – All rights reserved  
 Copyright notice  
This EAC document is copyright -protected by EAC. While the reproduction of this document by 
participants in the EAC standards development  process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
any other purpose without prior written permission from EAC.  
Requests for permission to reproduc e this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the country of the requester:  
© East African Community  2019 — All rights reserved  
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       Web: www.eac -quality.net  
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be prosecuted . 
 
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© EAC 2019  – All rights reserved  iii 
 Foreword  
Development of the East African Stand ards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and servic es are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standa rds Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including gove rnment, academia, consumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporated be fore finalization of standards, in 
accordance with the Principles and procedures for development of East African Standards.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are the refore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible for this document is Technical Committee EASC /TC 042, Production and general 
engineering .  
During the preparation of this  standard, reference was made to the following document:  
ISO 15601 , Hammers — Technical specifications concerning steel hammer heads — Test procedures  
Acknowledgement is hereby made for the assistance derived from this source.  
 
 
DRAFT STANDARD FOR PUBLIC REVIEWDRAFT STANDARD FOR PUBLIC REVIEWDRAFT EAST AFRICAN STANDARD  DEAS 1021 -1:2019  
 
© EAC 201 9 – All rights reserved  1 
 Hammer s — Specification  — Part 1: Steel hammer head  
1 Scope  
This Draft East Africa Standard specifies  technical requirements, methods of sampling  and testing of 
hammers with head made of steel.  It applies to hammers only used to strike items having a maximum 
hardness of 46 HRC.  
This Standard does not apply to steel hammer heads with a head mass of less than 100 g.  
NOTE : Striking items of a greater hardness is liable to cause chipping, this necessitates choosing hammers with 
properties different from those defined in this Standard.  
2 Normative references   
The following documents are referred to in the text in such a way that some or all of their content constitutes 
requirements of this document. For dated references, only the edition cited applies. For undated references, 
the latest ed ition of the referenced document (including any amendments) applies.  
ISO 13061 -1, Physical and mechanical properties of wood — Test methods for small clear wood specimens 
— Part 1: Determination of moisture content for physical and mechanical tests  
ISO 650 8-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, 
H, K, N, T)  
3 Terms and definitions  
No terms and definitions are listed in this document.  
ISO and IEC maintain terminological databases for use in standardi zation at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
4 Requirements  
4.1 Heat -treatment and hardness  
4.1.1  The head shall have a hardness of not less than 50 HRC and no t more than 58 HRC.  
4.1.2  The hardness at different points of the striking face shall be uniform within a total tolerance of 5 HRC.  
4.1.3  The central portion of the hammer shall not be hardened and in the area near the  eye of the hammer 
the hardness shall not exceed 35 HRC.  
4.1.4  The hardened zone of the striking faces shall extend to a minimum depth of 3 mm; at this depth, the 
hardness shall  be not less than 46 HRC and not more than that of the surface (see Figure 1).  
DRAFT STANDARD FOR PUBLIC REVIEWDEAS 1021 -1:2019  
2 © EAC 2019  – All rights reserved  
 4.1.5  In the case of ball pein hammer ends (see Figure 2) the 3 mm depth of hardness sh all only apply at 
the centre of the ball along the centre line and tapering towards the ball diameter, in order to avoid the 
hardened zone extending  to the rest of the hammer.  
 
4.2 Crack s 
All hammer heads s hall be free of cracks.  
Cracks are detected with appropriate means.  
Other equivalent non -destructive test methods may be used.  
4.3 Chamfer  
When a chamfer on the edge of the striking face is necessary, it shall be at least 1/ 15 of the head width and 
have a slant of 40° to 50°.  
 
Figure 3 — Chamfer  
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© EAC 2019  – All rights reserved  3 
 4.4 Handle  
Handles may be made of either steel, wood , plastic or any other material. For hammers fitted with a wooden 
handle, the moisture con tent of the handle at the time  the test is carried out  shall be between  10 % and 15 %  
in accordance with ISO 13061 -1. 
5 Test methods  
5.1 Pull apart test  
5.1.1  Prior to carrying out this test, two series of 25 vigorous blows with varying delivery angle (see Figure 
4) shall be  applied to a surface of hardness equal to or less t han 46 HRC.   
 
5.1.2  The hammer head and the end of the handle shall be securely worked in a tensile testing machine or 
other suitable  device.  
5.1.3  A tensile load on the handle side (see Figure 5) and a compression load on the head side (see Figure 
6) sha ll be applied gradually and without jerking.  
5.1.4  Loads to be applied are given in Table 1.  
5.1.5  For reverse assembled hammers with thermoplastic handles, only the compressive load shown in 
Figure 6 shall be  applied.  
5.1.6  After this test the hammer head  and handle shall show no damage such as shifting of the handle in 
the eye or other  defects that may reduce to its solidity.  
DRAFT STANDARD FOR PUBLIC REVIEWDEAS 1021 -1:2019  
4 © EAC 2019  – All rights reserved  
 
 
Table 1 — Loads to be applied according to head mass  
Hammer head mass  
M 
g Tensile/compression load  
F (min.)  
N 
100 ≤ m < 200 1 400  
200 ≤ m < 300 1 800  
300 ≤ m < 400 2 500  
400 ≤ m < 500 3 500  
500 ≤ m < 700 3 500  
700 ≤ m < 1 250  5 200  
1 250 ≤ m < 2 000  7 000  
2 000 ≤ m < 4 000  8 000  
4 000 ≤ m < 8 000  9 000  
8 000 ≤ m < 12 000  10 000  
 
5.2 Handle bending test for c law hammers  
5.2.1  Firmly keep the hammer head in a holding fixture with the axis of the handle parallel to the surface of 
the fixture  (see Figure 7).  
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© EAC 2019  – All rights reserved  5 
 
 
5.2.2  Apply a load, F', perpendicular to the axis of the handle and close to the end, so as to obtain a 125 
N.m torque,  irrespective of the size of the hammer.  
5.2.3  The load shall start at zero and be applied gradually, without jerking.  
5.2.4  The test load shall be held for at least 10 s, after which the handle shall show no sign of damage nor 
exhibit any  defect.  
5.3 Grip adhesion test  
5.3.1  For handles equipped with a grip, the grip shall not turn with respect to the handle when a 10 N.m 
torque is  applied.  
5.3.2  The test shall be carried out by applying an evenly distributed pressure on the whole of the gri p 
surface. The  necessary pressure shall not warp the grip.  
5.4 Crack detection  
The magnetic particle flow detection technique shall be used for checking cracks in which an alternating 
current of at least 15 mA/mm2 is applied to the hammer head (see Figure 8). 
 
DRAFT STANDARD FOR PUBLIC REVIEWDEAS 1021 -1:2019  
6 © EAC 2019  – All rights reserved  
 
 
Figure 8 — Method for crack detection  
6 Marking  
Hammers shall be marked on the head permanently and legibly with the following information;  
a) name of the manufacturer or initials or registered trademark ; 
b) mass of the hammer; and  
c) country of origin.  
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© EAC 2019  – All rights reserved  7 
 
DRAFT STANDARD FOR PUBLIC REVIEWDEAS 1021 -1:2019  
8 © EAC 2019  – All rights reserved  
 Bibliography  
ISO 15601,  Hammers — Technical specifications concerning steel hammer heads — Test procedures  
 
DRAFT STANDARD FOR PUBLIC REVIEWDEAS 1021 -1:2019    
 
© EAC 2019  – All rights reserved  
  
  
DRAFT STANDARD FOR PUBLIC REVIEW