¢À 1. Single Loop Chain

¢À 2. Double Loop Chain

¢À 3. Single Jack Chain

¢À 4. Double Jack Chain

¢À 5. Register Chain

¢À 6. Sash Chain

¢À 7. Plumber's Chain

¢À 8. Minimum Allowable Thickness

¢À WELDLESS CHAIN SPECIFICATIONS ¢À(NACM)

¢À 1.0 TITLE

¢À 2.0 SCOPE

¢À 3.0 DEFINITIONS

¢À 4.0 MATERIALS AND MANUFACTURING

¢À 5.0 TESTING

¢À 6.0 DIMENSIONS

¢À 7.0 FINISH

¢À 8.0 WARNING

¢À 1. Single Loop Chain ±×¸² item No. D P W W.T per(30.5m) Working Load Limit Minimum Breaking Force Steel Brass Steel Brass Steel Brass mm mm mm kg kg kg kn kn SBB101 SBB201 2.3 27.4   5 70 50 2.8 2.0 SBB102 SBB202 *3.0 32.8   8 120 84 4.7 3.3 SBB103 SBB203 *3.4 37.6   10 154 109 6.0 4.3 SBB104 SBB204 *3.8 41.4   12 184 129 7.2 5.1 SBB105 SBB205 *4.1 45.7   14 220 154 8.6 6.0 SBB106 SBB206 *4.5 54.6   16 263 184 10.3 7.2 ¢À Heavier and stronger than other weldless chain of same wire diameter. Ideal for pipe suspension and operating overhead doors and steam valves, ventilators, value wheels, sprocket wheels. ¢À This chain meets the requirements of Fed Spec RR-C-271D Type II, Class 1 ¢À Note: Weights are approximate and for steel chain only. Length per 100 links is subject to plus or minus tolerance of 4%. ¢À Steel chain is made from low carbon steel and is not heat treated. DO NOT USE FOR OVERHEAD LIFTING ¢À WORKING LOAD LIMIT designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain. WARNING: WORK LOAD LIMIT MUST NOT BE EXCEEDED. ¢À BREAK TEST LOAD is the minimum load in pounds at which new chain has been found by experience to break, under tests in which the load is applied in direct tension to a straight length of chain with a uniform rate of speed on a standard chain testing machine.

¢À 2. Double Loop Chain item No. D P W W.T per(30.5m) Working Load Limit Minimum Breaking Force Steel Brass Steel Brass Steel Brass mm mm mm kg kg kg kn kn SBB108 SBB208 1.6 23.4   2 25 18 1.0 0.7 SBB109 SBB209 1.8 25.4   2 32 23 1.2 0.9 SBB110 SBB210 2.0 27.9   3 41 29 1.6 1.2 SBB111 SBB211 2.3 33.8   4 52 36 2.0 1.4 SBB112 SBB212 2.7 39.1   5 70 50 2.8 2.0 SBB113 SBB213 2.7 51.6   4 70 50 2.8 2.0 SBB114 SBB214 *3.0 45.2   6 91 63 3.6 2.5 SBB115 SBB215 *3.0 56.9   5 91 63 3.6 2.5 SBB116 SBB216 *3.4 46.2   8 116 82 4.5 3.2 SBB117 SBB217 *3.4 56.9   7 116 82 4.5 3.2 SBB118 SBB218 *3.8 55.1   9 138 98 5.4 3.8 SBB119 SBB219 *4.1 55.6   11 166 116 6.5 4.5 SBB120 SBB220 *4.9 73.8   15 232 161 9.1 6.3 SBB121 SBB221 *5.7 73.7   23 320 227 12.5 8.9 ¢À A general utility chain for multiple applications such as porch swings, children's swings, animal chains and light fixtures. ¢À This chain meets the requirements of Fed Spec RR-C-271D Type II, Class 2 ¢À Note: Weights are approximate and for steel chain only.  Length per 100 links is subject to plus or minus tolerance of 4%. ¢À Steel chain is made from low carbon steel and is not heat treated. DO NOT USE FOR OVERHEAD LIFTING ¢À WORKING LOAD LIMIT designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain. WARNING: WORK LOAD LIMIT MUST NOT BE EXCEEDED. ¢À BREAK TEST LOAD is the minimum load in pounds at which new chain has been found by experience to break, under tests in which the load is applied in direct tension to a straight length of chain with a uniform rate of speed on a standard chain testing machine.

¢À 3. Single Jack Chain item No. D P W W.T per(30.5m) Working Load Limit Minimum Breaking Force Steel Brass Steel Brass Steel Brass mm mm mm kg kg kg kn kn SBB123 SBB223 0.9 7.6   1 1 1 0.1 0.1 SBB124 SBB224 1.2 9.9   1 2 2 0.1 0.1 SBB125 SBB225 1.6 12.7   1 5 4 0.2 0.1 SBB126 SBB226 2.0 16.0   2 7 5 0.3 0.2 SBB127 SBB227 2.7 19.1   4 13 9 0.5 0.4 SBB128 SBB228 *3.4 23.6   6 20 15 0.8 0.6 SBB129 SBB229 *4.1 27.7   10 27 20 1.1 0.8 SBB130 SBB230 *4.9 31.5   14 40 30 1.6 1.2 ¢À Ideal for hanging signs, lighting fixtures and novelties such as flower pots, children's toys and other general utility applications. ¢À This chain meets the requirements of Fed Spec RR-C-271D Type II, Class 7 ¢À Note: Length per 100 links is subject to plus or minus tolerance of 4%. ¢À Steel chain is made from low carbon steel and is not heat treated. DO NOT USE FOR OVERHEAD LIFTING ¢À WORKING LOAD LIMIT designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain. WARNING: WORK LOAD LIMIT MUST NOT BE EXCEEDED. ¢À BREAK TEST LOAD is the minimum load in pounds at which new chain has been found by experience to break, under tests in which the load is applied in direct tension to a straight length of chain with a uniform rate of speed on a standard chain testing machine.

¢À 4. Double Jack Chain item No. D P W W.T per(30.5m) Working Load Limit Minimum Breaking Force Steel Brass Steel Brass Steel Brass mm mm mm kg kg kg kn kn SBB132 SBB232 1.6 8.6   2 5 4 0.2 0.1 ¢À Generally same uses as single jack chain - hanging signs, lighting fixtures, flower pots & general utility uses. ¢À Note: Length per 100 links is subject to plus or minus tolerance of 4%. ¢À Steel chain is made from low carbon steel and is not heat treated. DO NOT USE FOR OVERHEAD LIFTING ¢À WORKING LOAD LIMIT designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain. WARNING: WORK LOAD LIMIT MUST NOT BE EXCEEDED. ¢À BREAK TEST LOAD is the minimum load in pounds at which new chain has been found by experience to break, under tests in which the load is applied in direct tension to a straight length of chain with a uniform rate of speed on a standard chain testing machine.

¢À 5. Register Chain item No. Material Size Inside Length Outside Length W.T per(30.5m) Working Load Limit Minimum Breaking Force Steel Brass Steel Brass Steel Brass mm mm mm kg kg kg kn kn SBB134 SBB234 1.2 9.9   1 4 2 0.2 0.1 SBB135 SBB235 2.7 20.3   7 23 16 0.9 0.6 SBB136 SBB236 *3.4 25.9   9 38 26 1.5 1.0 ¢À Generally has the same use as single jack chain, but is stronger and can be used in more heavy duty applications. ¢À Note: Length per 100 links is subject to plus or minus tolerance of 4%. ¢À Steel chain is made from low carbon steel and is not heat treated. DO NOT USE FOR OVERHEAD LIFTING ¢À WORKING LOAD LIMIT designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain. WARNING: WORK LOAD LIMIT MUST NOT BE EXCEEDED. ¢À BREAK TEST LOAD is the minimum load in pounds at which new chain has been found by experience to break, under tests in which the load is applied in direct tension to a straight length of chain with a uniform rate of speed on a standard chain testing machine.

¢À 6. Sash Chain item No. D P W W.T per(30.5m) Working Load Limit Minimum Breaking Force Steel Brass Steel Brass Steel Brass mm mm mm kg kg kg kn kn SBB138 SBB238 0.9 14.1   2 34 31 1.3 1.2 SBB139 SBB239 1.1 14.1   2 43 36 1.7 1.4 SBB140 SBB240 0.7 14.4   2 37 34 1.4 1.3 SBB141 SBB241 0.9 14.4   3 48 45 1.9 1.8 SBB142 SBB242 1.1 14.4   3 59 57 2.3 2.2 SBB143 SBB243 1.3 14.4   4 79 74 3.1 2.9 SBB144 SBB244 1.5 15.1   5 102 95 4.0 3.7 SBB145 SBB245 1.6 19.3   7 105 102 4.1 4.0 SBB146 SBB246 1.8 22.2   9 145 136 5.7 5.3 ¢À Suitable for applications requiring flat metal chain and operation over pulleys such as windows and sashes. ¢À This chain meets the requirements of Fed Spec RR-C-271D Type II, Class 3 ¢À Note: Weights are approximate and for steel chain only. Length per 100 links is subject to plus or minus tolerance of 4%. ¢À Steel chain is made from low carbon steel and is not heat treated. DO NOT USE FOR OVERHEAD LIFTING ¢À WORKING LOAD LIMIT designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain. WARNING: WORK LOAD LIMIT MUST NOT BE EXCEEDED. ¢À BREAK TEST LOAD is the minimum load in pounds at which new chain has been found by experience to break, under tests in which the load is applied in direct tension to a straight length of chain with a uniform rate of speed on a standard chain testing machine.

¢À 7. Plumber's Chain item No. D P W W.T per(30.5m) Working Load Limit Minimum Breaking Force Steel Brass Steel Brass Steel Brass mm mm mm kg kg kg kn kn SBB148 SBB248 0.5 15.3   1 14 10 0.5 0.4 SBB149 SBB249 0.6 15.3   1 18 16 0.7 0.6 SBB150 SBB250 0.7 17.8   2 26 20 1.0 0.8 ¢À Commonly used for plumbing fixtures or as a keeper chain. ¢À This chain meets the requirements of Fed Spec RR-C-271D Type II, Class 6 ¢À Note: Length per 100 links is subject to plus or minus tolerance of 4%. ¢À WORKING LOAD LIMIT designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain. WARNING: WORK LOAD LIMIT MUST NOT BE EXCEEDED. ¢À BREAK TEST LOAD is the minimum load in pounds at which new chain has been found by experience to break, under tests in which the load is applied in direct tension to a straight length of chain with a uniform rate of speed on a standard chain testing machine.

¢À 8. Minimum Allowable Thickness Measurement at Any Location on the Chain Type of Chain Size Remark Nominal Material Diameter Minimum Allowable Thickness on Link mm mm Single Loop & Double Loop *3.0 3.0 2.64 *3.4 3.4 2.97 *3.8 3.8 3.25 *4.1 4.1 3.55 *4.5 4.5 3.88 *4.9 4.9 4.21 *5.7 5.7 4.95 Single Jack Register *3.4 3.4 2.97 *4.1 4.1 3.55 *4.9 4.9 4.21 ! Warning: Remove chain from service if the thickness is less than the minimum shown in Table VIII at any location on the link.

¢À WELDLESS CHAIN SPECIFICATIONS

(Adopted April 26, 2003 by the National Association of Chain Manufacturers Re-affirmed April 24, 2009 NACM WELDLESS CHAIN SPECIFICATIONS Adopted April 26, 2003 2) Use and Performance Limitation These size and related specifications are applicable to chain in proper physical condition used at or below the working load limit in normal use conditions. The conditions involving use in certain environmental situations such as unusual (high or low) temperature, chemical, etc., can cause changes in chain performance. Sudden application of dynamic loads, which cause the load in the chain to exceed the working load limit, are to be avoided. Individual manufacturers will provide information and recommendations concerning those conditions most likely to cause problems. This document has been developed by the National Association of Chain Manufacturers (NACM) in accordance with its objectives. NACM, its members, and those participating in its activities shall not incur any obligation or liability for injury or damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance on this document. NACM does not inspect, approve or certify products as complying with the requirements of this document. ¢À 1.0 TITLE 1.1 NACM Weldless Chain Specifications ¢À 2.0 SCOPE 2.1 These specifications cover the types and properties of weldless chain for industrial and commercial uses. The chains listed below are suitable for many purposes where lightness, flexibility and relative low strength are required. Actual application governs the size and type of chain which should be used. Single Loop Chain Suitable for operating valve wheels, overhead doors, ventilators, sprocket wheels, etc. Double Loop Chain Suitable for public playground and gymnasium equipment, animal chains, padlock chains, boat chains, gate chains, etc. Single Jack Chain Suitable for suspension of fixtures such as flower pots, fluorescent lights, keeper chain, etc. Double Jack Chain Suitable for ornamental chain, suspension of light fixtures, children's toys, etc. Register Chain Suitable for operating furnace doors, ducts or dampers, skylight mechanisms, etc. Sash Chain Flat metal chain, suitable for suspension of double hung sash, pulley applications, etc. Plumbers Chain Flat metal chain, adaptable to many uses where a light chain is required, as for plumbing fixtures, keeper chain, etc. ¢À 3.0 DEFINITIONS 3.1 Working Load Limit (WLL) The "Working Load Limit" (rated capacity) is the maximum load that shall be applied in direct tension to a new and undamaged straight length of chain. 3.2 Minimum Breaking Force The "Minimum Breaking Force" is the minimum force at which the chain during manufacture has been found by testing to break when a constantly increasing force is applied in direct tension. Breaking force values are not guarantees that all chain segments will endure these loads (see Section 5.2). This test is a manufacturer's attribute acceptance test and shall not be used as a criterion for service or design purposes. 3.3 Overload Any static or dynamic load in excess of "Working Load Limit." ¢À 4.0 MATERIALS AND MANUFACTURING 4.1 Material The selection of the base material is left to the judgment of the individual chain manufacturer provided that the resultant chain complies with the requirements contained in this specification. 4.2 Manufacturing Methods The manufacturer will select suitable manufacturing methods such that the chain complies with the requirements contained within this specification. ¢À 5.0 TESTING 5.1 Mechanical Properties The mechanical properties of the various chain sizes and designations are given in Tables 1 through 7. 5.2 Selection of Samples 5.2.1 For the purpose of acceptance testing of chain, a lot shall consist of 3,000 feet (1,000 meters) or fraction thereof of the same type and size of chain. If a continuous length of chain exceeds 3,000 feet (1,000 meters), it is also considered a lot. 5.2.2 At least one sample from each lot shall be tensile tested. If the original test specimen fails to conform to the minimum breaking force requirements as prescribed in Tables 1 through 7 for their respective sizes, two additional test specimens from the same lot may be tested. If both additional test specimens conform to the requirements specified, the chain will be considered acceptable. 5.3 Test Method 5.3.1 A test specimen shall consist of a length not less than one foot (0.3 meter), taken from any stage of manufacture after the forming process. 5.3.2 Fixtures for securing chain test specimens in the testing machine must securely support the link. Links engaged in the testing fixtures shall not be considered part of the test specimen. ¢À 6.0 DIMENSIONS 6.1 Dimensional Requirement The nominal dimensional requirements for the various types and sizes are given in Tables 1 through 7. The actual dimensions may vary by ¡¾7%. The inside length dimension can be measured either by individual link or by measuring the span of 100 links and dividing by 100. 6.2 Material Diameter The diameter or thickness of the material from which the chain is manufactured shall be at least the dimension shown in Tables I through VII, subject to normal commercial tolerances. Oversized material may be used for all applications. ¢À 7.0 FINISH 7.1 The manufacturer may apply a surface treatment or coating of his or the customer's choice for identification or corrosion resistance unless the customer specifies otherwise. ¢À 8.0 WARNING The use of chain is subject to certain hazards that cannot be met by mechanical means, but only the exercise of intelligence, care and common sense. Serious hazards are: Overloading, improper rigging, bending, twisting and the use of damaged chain. Any such abuse or misuse may cause injury or property damage for which the manufacturer accepts no liability. Under no conditions are loads to be transported or suspended over people. All chains should be periodically inspected for wear, elongation, nicks, gouges, cracks, and suitability for the application. Excessive high or low temperatures or exposure to chemically active environments such as acids or corrosive liquids or fumes can reduce the performance of the chain. Chains should not be used outside of the -40 ¡ÆF to 400 ¡ÆF (-40 ¡ÆC to 204 ¡ÆC) temperature range without consulting the manufacturer. Removal criteria for wear and damage have been established for the larger diameter chains covered under this specification, and are listed in Table 8. All chain should be removed from service if the thickness at any location on the link is less than the listed minimum value. Sash and Plumbers' chain use non-round cross sections, and therefore the minimum diameter method cannot be used. For these chains as well as the smaller diameter loop and jack chains, observable wear or a change in the material dimension of more than 10% is cause for removal. Manufacturers do not accept any liability for injury or damage which may result from chain used in excess of working load limit or used in a manner contrary to the manufacturer's instructions or recommendations. When mixing types of chain or components, all chain assemblies shall be rated at the working load limit of the lowest rated chain or component. All chains specified within this specification are not to be used in overhead lifting applications. * Refernance : Copyright, 2003, National Association of Chain Manufacturers.