1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 768 Combination LocksUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
2、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Combination Locks, UL 768 Eighth Edition, Dated January 6, 2006 Summary of Topics This revision of ANSI/UL 768 revises 10.5.2 and 10.5.5 to remove the requirement for three separate experts for the manipulation tests. Text that h
3、as been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the cha
4、nged requirement becomes effective. The revisions are substantially in accordance with Proposal(s) on this subject dated December 2, 2011 and April 26, 2013. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, ele
5、ctronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL b
6、e liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibili
7、ty of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liabi
8、lity, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tab
9、les, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREM
10、ENTS notice. JULY 10, 2013 UL 768 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 10, 2013 UL 768 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Janu
11、ary 6, 2006 (Title Page Reprinted: July 10, 2013) 1 UL 768 Standard for Combination Locks First Edition January, 1953 Second Edition May, 1961 Third Edition July, 1972 Fourth Edition August, 1978 Fifth Edition June, 1984 Sixth Edition February, 1994 Seventh Edition December, 1999 Eighth Edition Janu
12、ary 6, 2006 This ANSI/UL Standard for Safety consists of the Eighth Edition including revisions through July 10, 2013. The most recent designation of ANSI/UL 768 as an American National Standard (ANSI) occurred on July 10, 2013. ANSI approval for a standard does not include the Cover Page, Transmitt
13、al Pages, Title Page, or effective date information. The Department of Defense (DoD) has adopted UL 768 on April 5, 1976. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be su
14、bmitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Sta
15、ndards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 768-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APR
16、IL 15, 2010 COMBINATION LOCKS - UL 768 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 General 4 2.1 Components .4 2.2 Units of measurement .4 2.3 Undated references .5 3 Classication
17、.5 4 Glossary .5 CONSTRUCTION 5 General 6 6 Nonmetallic Parts .7 7 Corrosion Protection .7 PERFORMANCE 8 General 7 9 Operation Test 7 10 Resistance to Unauthorized Opening .7 10.1 Group 1 7 10.2 Group 1R 8 10.3 Group 2M 8 10.4 Group 2 9 10.5 All classes 9 11 Endurance Test 10 12 Salt Spray Corrosion
18、 Test .10 13 Tests of Polymeric Material 11 13.1 Strength .11 13.2 Aging-stress distortion 11 13.3 Moisture absorption .11 14 Vibration Test 12 MARKING 15 General 12 JANUARY 6, 2006 COMBINATION LOCKS - UL 768 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PE
19、RMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover combination locks intended for attachment on doors of safes, chests, vaults, and the like, to provide a means of locking the boltwork against unauthorized opening. 1.2 These requirements are intended to test the ability of combinatio
20、n locks to resist unauthorized opening of the combination locks by sense of sight, touch, or hearing. Combination locks covered by these requirements may or may not have integral protection against entry by force. 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a component of a product
21、covered by this standard shall comply with the requirements for that component. 2.1.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is super
22、seded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.1.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only
23、under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. JANUARY 6
24、, 2006 COMBINATION LOCKS - UL 768 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to t
25、he latest edition of that code or standard. 3 Classication 3.1 Combination locks are classied as Group 1, Group 1R, Group 2M, or Group 2. 3.2 GROUP 1 Those locks that have a high-degree of resistance to expert or professional manipulation. The protection against expert manipulation includes advanced
26、 construction features not found in conventional designs. Group 1 locks shall have 20 working hours of resistance to expert or professional manipulation. See 10.1.1 10.1.5 and 10.5.1 10.5.8. 3.3 GROUP 1R Group 1R locks shall have 20 working hours of resistance to expert or professional manipulation,
27、 the same as for Group 1 and, in addition, have 20 working hours of resistance to radiological attack. See 10.2.1 and 10.5.1 10.5.8. 3.4 GROUP 2M Those locks that have 2 working hours of resistance to expert or professional manipulation. See 10.3.1 10.3.5 and 10.5.1 10.5.8. 3.5 GROUP 2 Those locks t
28、hat have a moderate degree of resistance to unauthorized opening. See 10.4.1 10.4.4 and 10.5.1 10.5.8. 4 Glossary 4.1 For the purpose of this standard the following denitions apply. 4.2 DRIVE CAM a) A circular component connected directly to the spindle; its drive pin transfers rotation to the wheel
29、s, and its gate is shaped to accept the lever nose. b) The drive cam screws onto the spindle within the lock case. It is locked into position by a spline key that is pushed snugly into a groove milled into the drive cam and spindle. Once locked into position on the spindle, the drive cams purpose is
30、 to transmit the drive to the wheels and also to withdraw the lock bolt. The drive from the drive cam to the third wheel is transmitted via a small drive pin on the cam. 4.3 DRIVE PIN A pin extending from the underside of the drive cam and from all but the rst wheel in a wheel pack; it transfers mot
31、ion to the next component in the wheel pack. 4.4 FENCE A part of the lever (see 4.6) projecting across the periphery of the wheels that t into the wheel gates, permitting the lever nose to engage in the drive cam. 4.5 GATE The cutout in the periphery of the tumbler that is engaged by the fence on th
32、e lever assembly. 4.6 LEVER (DROP LEVER) a) Connects bolt and drive cam during lock operation. b) Serves to retract the bolt when the proper combination has been aligned. JANUARY 6, 2006 COMBINATION LOCKS - UL 768 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHO
33、UT PERMISSION FROM UL c) The drop lever attaches to the bolt via a pivot screw or post. Attached to the lever is a fence (see 4.4) that drops into the wheel gate when they are correctly aligned. The nose of the drop lever rides on the drive cam, dropping into a gate in the drive cam when the wheels
34、are correctly positioned. When the combination wheels of the lock are properly aligned, the fence of the lever enters the wheel pack only after the drive cam gate is positioned at the lever nose. Once the lever nose has entered the drive cam gate and the lever fence has entered into the wheel gates,
35、 the locking, or blocking bolt of the lock is capable of being withdrawn by further rotation of the lock dial. 4.7 TUMBLER PACK Set of wheels, ys, and isolation (spacing) washers supported by a torque adjuster or wave washer and secured with a retainer. 4.8 WHEEL POST A component, usually cast as pa
36、rt of the lock case or cover, on which the wheel pack is assembled and about which the wheels rotate. 4.9 WHEEL Assembly, usually in the form of a circular disc, having a gate and drive pin whose locations are set to selected positions to permit combination change. CONSTRUCTION 5 General 5.1 A lock
37、shall present a user with a minimum of 1,000,000 (one million) separate dialable or enterable codes or combinations. Although a combination lock may provide for a choice of 1,000,000 codes or combinations, there may be some codes or combinations that the user is advised not to use. The instructions
38、with the lock shall advise the user of these cautions and conditions; for example: a) The same digit or character for each input; b) Digits or characters in rising or descending order with spacing of 5 or less digits or characters between each entry; c) Telephone numbers and birth dates; d) Digits o
39、r characters that associate with a company or individual name; e) Simple combinations such as 20-40-60; and f) An original factory combination or code. On mechanical dial-type combination locks, there is a segment of numbers that cannot be used as the last number in a sequence since the use of numbe
40、rs in that segment will cause a malfunction of the lock. JANUARY 6, 2006 COMBINATION LOCKS - UL 768 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6 Nonmetallic Parts 6.1 Factors taken into consideration when determining compliance with th
41、e requirements of nonmetallic parts are: a) Mechanical strength, b) Resistance to impact, c) Moisture absorptive properties, and d) Resistance to distortion of the material under conditions of normal or abnormal usage. See Tests of Polymeric Material, Section 13. 7 Corrosion Protection 7.1 All worki
42、ng parts of the lock mechanisms shall be constructed of brass, bronze, stainless steel, or equivalent corrosion-resistant materials, or shall have a protective nish that permits the lock mechanism to comply with the Salt Spray Corrosion Test, Section 12. PERFORMANCE 8 General 8.1 Fourteen samples of
43、 a Group 1, a Group 1R, and a Group 2M lock, and ve samples of a Group 2 lock are to be tested. All samples are to be mounted on 1/4-inch (6.4-mm) thick steel plates 6 by 8 inches (152 by 203 mm). 9 Operation Test 9.1 The lock shall operate as intended on the code or combination to which it is set.
44、10 Resistance to Unauthorized Opening 10.1 Group 1 10.1.1 A Group 1 lock shall resist unauthorized opening for a period of 20 working hours when subjected to the manipulation techniques specied in 10.5.3 10.5.5. 10.1.2 The time period specied in 3.2 and 10.1.1 may include one person working 20 hours
45、, two people working together 10 hours, or equivalent combinations. This time limit is not to include the time spent on the unsealed sample. 10.1.3 A three-wheel lock shall not open when the dial is turned more than one full dial graduation on either side of the proper graduation for each wheel. A f
46、our-wheel lock shall not open when the dial is turned more than 1-1/4 dial graduations on either side of the proper graduation for each wheel. JANUARY 6, 2006 COMBINATION LOCKS - UL 768 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 10.1.4
47、 The test for a three-wheel lock is to be conducted by changing the combination one number at a time in the following manner: a) Dial the combination with the rst number one graduation lower than set, and the second and third numbers as they are set; b) Then dial the combination with the rst number
48、one graduation higher than set, and the second and third numbers as they are set; c) Then dial the combination with the second number one graduation lower than set, and the rst and third numbers as they are set; d) Then dial the combination with the second number one graduation higher than set, and
49、the rst and third numbers as they are set; e) Then dial the combination with the third number one graduation lower than set, and the rst and second numbers as they are set; and f) Then dial the combination with the third number one graduation higher than set, and the rst and second numbers as they are set. 10.1.5 A four-wheel lock is to be tested in the same sequence as described in 10.1.4 except that the change is to be 1-1/4 dial graduations lower or higher.
