1. Rationale
Bump Key Testing In order to be in compliance with the proposed ASTM testing, standard locks submitted for Bump Testing are similar to locks submitted for Pick testing. Those current F883 specifications are: 6. Test Specimens 6.1 Select specimens for test at random from the manufacturers finished stock of each size and model being certified by the manufacturer. 6.2 Padlocks may be used for multiple tests if previous tests would not influence subsequent test results. 6.3 Select four padlocks for the forcing tests. For surreptitious entry tests, select five padlocks for each test required. Select one padlock for the cycle test. 6.4 When appropriate, select one padlock for the salt spray test (Option E) and three for the environmental tests (Option G). 9. Surreptitious Entry Tests (see Table 2) 9.1 Picking or Manipulating Test : 9.1.1 Cylinders in padlocks shall resist picking (see 5.1) for the required time. Combination padlocks shall resist manual manipulation (see 5.1) for the required time. 9.1.2 Cylinders in padlocks submitted for test containing pin tumblers shall be loaded using one each of the longest and the shortest bottom pins furnished by the manufacturers with the remaining chambers loaded with other sizes. Cylinders in padlocks containing other tumbler elements shall be loaded using maximum ranges. If lock design and cylinders used are the same in several different sizes of padlocks submitted for testing, only a total of five samples of any size or sizes need to be tested. 9.1.3 The tools used for this test shall be manual manipulating tools required by the operator, providing no visible marks are left detectable by the unaided eye. 9.2 Cylinder Impressioning and Decoding Tests: 9.2.1 Cylinders shall resist successful impressioning and decoding (see 5.1) for the required time. 9.2.2 Padlocks with cylinders submitted for test shall be loaded in accordance with 9.1.2. 9.3 Shackle Shimming TestInsert any shim stock selected (see 5.1) that can be inserted in the clearance between the shackle and the case in either or both of the case shackle holes of a locked padlock and manipulate for the required time. 9.4 Cylinder Drilling and Shimming Test: 9.4.1 Use hand-held tools. 9.4.2 Load cylinders in accordance with 9.1.2. 9.4.3 Cylinders in locked padlocks hanging from a hasp shall resist drilling and shimming for the required time. Results of the drilling test shall not be obvious to the unaided eye. 9.5 Rap Test: 9.5.1 Use hand-held tools. 9.5.2 Padlocks shall resist successful rapping on the cylinder and case (see 5.1) for the required time. The development of a standardized fixture for objective bump key testing has not been successful to date. In order to have a standard for bump testing until a fixture can be developed it is recommended that the subjective bump test outlined next be included immediately in standard F883. Here is the proposed Bump Testing standard for ASTM F883. This proposal is subject to modification before being finalized but can serve as a guide for now. Proposed changes or additions are in red. Since no input has been received by the May 1, 2008 dated agreed to in the April meeting of committee F12.5 I have prepared the lines in blue below to complete the proposal. These comments are based upon the approach used in the attached scan of the relevant portion of British Standard PAS24-2007 and BS3621-2007. I propose that anyone having an objection or further suggestion for this proposal as presented here must submit it by June 20, 2008 for inclusion. After that time I would like to see the proposal posted for an online committee F12.5 vote and subsequent ASTM wide vote to become part of the F883 revision as soon after the October meeting as possible. That should give us time to address any negatives at the October meeting. A Key Bumping Test Proposal for ASTM Standard F883 3. Terminology Add the following terms and definitions bump key, n. a lock picking key with uniform steeples between cuts that is forced further into the lock via impact lock bumping, n. a picking technique that utilizes a configured key forcefully impacted into the keyway pull bump key, n. a lock picking key that must be pulled from the lock one space position between impacts push bump key n. a lock picking key that centers itself after each impact 5. General Requirements 5.2 Key Bumping is a subjective test to be conducted using bump keys designed for the lock or cylinder being tested and an impact device as outlined in section 7. Renumber current 5.2. as 5.3, 5.3 as 5.4 and 5.4 as 5.5 6. Test Specimens 6.2 Padlocks or cylinders may be used for multiple tests if previous tests would not influence subsequent test results. 6.3 Select four padlocks or cylinders for the forcing tests. For surreptitious entry tests, select five padlocks or cylinders for each test required. Select one padlock or cylinder for the cycle test. 6.4. Each lock submitted for bump testing will be supplied with seven cut keys that operate the lock. 7. Preparation of Apparatus 7.3. Key Bumping 7.3.1 Each locksmith performing the test shall use two of the supplied keys to fabricate his own pull bump key and push bump key. 7.3.2 Both a pull bump key and a push bump key will be used to test a lock or cylinder for bump resistance by each of 3 locksmiths. 7.3.2.1. A torque bar may be used if the test person prefers that method. 7.3.2.2. A single impact cycle consists of having a bump key fully inserted into the keyway and withdrawing it one cut position for the pull type, inserting the key fully into the keyway and then releasing it to allow the pins to center it for the push type, impacting the end of the key to drive it fully into the keyway while torque is applied. If it operates after the impact, it failed the test at that cycle and will be given the appropriate grade level for the last cycle that did not accomplish operation. If it did not operate, a new cycle will be achieved until the lock or cylinder reaches Grade 6. 7.3.3. Provide various mounting blocks for locks or cylinders as required by the test person if rigid mounting is preferred. 7.3.4. The impact device may be a non-metal instrument with a weight not to exceed .25 pounds. 9. Surreptitious Entry Tests (see Table 2) 9.1.2 Cylinders or padlocks submitted for test containing pin tumblers shall be loaded using one each of the three or four mid-range bittings available unless such a combination would not normally be supplied as a stock product. Cylinders in padlocks containing other tumbler elements shall be loaded using maximum ranges. If lock design and cylinders used are the same in several different sizes of padlocks submitted for testing, only a total of five samples of any size or sizes need to be tested. 9.6 Key Bumping Test The testing person must change the order of testing for 9.6.1 and 9.6.2 to use the most likely successful bumping attack first. 9.6.1. A lock or cylinder not previously bump tested by the locksmith should be mounted in a block if the testing person prefers that method and have the prepared pull bump key inserted. A prepared pull bump key may have a hole drilled in the bow for mounting a weight bar if the testing person prefers that method. 9.6.2. A lock or cylinder bump tested per 9.6.1 should be mounted in a block if the testing person prefers that method and have the prepared push bump key inserted. A prepared push bump key may have a hole drilled in the bow for mounting a weight bar if the testing person prefers that method. 9.6.3. Impacts with the impact device will be by hand using a rapping motion which ensures that the impact device applies force to the bump key a single time and does not allow bouncing impact of the impact device. 9.6.4. Impacts to the key shall be performed at a minimum rate of 4 per minute. Any accelerated rate of impact may be used during the test to achieve the quantity of impacts required by the stated minimum rate/ time requirement for a given grade level, i.e. 10 impacts in 2.5 minutes by each type of bump key without operation = Grade 1, or 10 impacts by each type of bump key in less than 2.5 minutes without operation = Grade 1. 9.6.5. The torque applied to the bump key during the impact testing shall be no less or no greater than the testing person has found optimum from past experience. 9.6.6. If the cylinder or lock is not operated by the bump key within 10 impact cycles of either type of bump key, the lock is classed as Grade 1. Locks or cylinders that are operated by either type of bump key in 10 or less impacts will be qualified as having Grade zero bump resistance. 9.6.7. The test described in 9.6.4 through 9.6.6. shall be repeated through 10 complete impact cycles with each type bump key for each Grade level from 2 through 6 or until operated by a bump key. A cylinder or lock that is operated by either type of bump key on the 11th through 20th cycle will be qualified as Grade 1, 21st through 30th = Grade 2, 31st through40th = Grade 3, 41st through 50th = Grade 4, 51st through 60th = Grade 5. Any cylinder or lock that resists operating for a total of 60 impacts by each type of bump key shall be qualified as Grade 6. 9.6.7. The test shall be repeated for each of the remaining cylinders. The lowest Grade level achieved by any single cylinder shall be the grade of all cylinders in the test. 9.6.8. At the conclusion of testing by each locksmith the seventh cut key shall be used to verify that the lock or cylinder still functions. 9.6.9. Failure of the lock or cylinder to function does not constitute failure of the testing since it provides a detection method of a bumping attempt. 9.6.10. A lock or cylinder which captures the bump key to prevent an unlocking motion using a bump key shall be classed as grade 6. TABLE 2 Surreptitious Entry Tests Required Values Surreptitious Entry Tests Grades 1 (S1)2 (S2)3 (S3)4 (S4)5 (S5)6 (S6) Picking or Manipulation, min1/2 124815 Bump Key Attack min2 1/257 1/21012 1/215 Impressioning or Decoding minN/AN/A24815 Shackle Shimming Test min1/2 124815 Drilling and Shimming minN/AN/AN/A4815 Rapping minN/AN/A24815
Keywords
cutting shackle; padlock impact; padlock testing; salt UV testing; shackle wedge; ICS Number Code 91.190
Citing ASTM Standards
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