PRODUCTS Small but effective
Small like a 5 Eurocent coin, this is the size of the new hose clamp produced by Nordic Metalblok, an Italian manufacturer of metal hose clamps since 1971.
and 12mm-20mm. This type of clamp is suitable for application where no high torque is requested. The MINIMEB 5mm has a safe working torque according to DIN 3017 regulation: 0.3Nm.
www.nordicmetalblok.com
T Clever stud says when it’s tensioned
Nuclear, rail, petrochemical, wind, crane, in fact most industries recognise the importance of proper stud or bolt tension. In fact, Arnold Wragg believes more than 90% of all bolted joint failures are attributable to insufficient stud or bolt tension on installation.
R T
ecognition of this will challenge some industries torque-tightening practices as they mature and adopt more sophisticated technology to improve reliability and reduce maintenance costs.
To start, says Arnold Wragg, let’s review current practices. For
instance, studs on crane slew ring systems are often tightened in one of two ways: either by torque or by hydraulic tension tightening. Torque is a rotational force applied to a lever and multiplied by its distance from the centre of the tightening end (fulcrum). Torque, measured in Nm or lbs-ft, rotates a bolt head or nut to tighten and stretch the stud so it clamps two surfaces together. Hydraulic torque wrenches allow the operator to control the torque applied and are extensively used to tighten studs and bolts. Although simple to use, the technique suffers from inaccuracy due to inconsistent friction. Even on lubricated threads and
Atlas® MONEL®
nuts, the level of friction is uncontrollable. This means there is a critical lack of tension control that can lead to stud or bolt failure, and ultimately compromise joint integrity. Sheffield based aerospace fastener specialist Arnold Wragg
Ltd, has come up with a solution. An intelligent stud called the EcoStud, a simple mechanism inside the stud provides an indicator of the real load or tension. When this stud is tightened, the cap locks at exactly the right amount of preload in the stud. This allows for more control during tightening while ensuring that an OEM’s design criteria is met independent of the tightening system. It also allows checking of the bolt’s status in service (if the cap on the bolt does not turn, it’s still tight) something traditional bolt retightening checks are unable to do. EcoStud fasteners are guaranteed to consistently indicate within ±5% of the specified load regardless of environmental influences.
inserts PennEngineering says that its new Atlas® MONEL® blind threaded inserts (Type AEKM) provide strong
permanent threads in thin panel sections and offer excellent corrosion resistance ideally suited for attachment applications where equipment or components will be exposed to especially harsh conditions.
hese high strength nickel-copper alloy 400 fasteners additionally feature a minimised profile head allowing for near flush installations without requiring special hole preparation (such as countersinking or dimpling).
PennEngineering points out that the Type AEKM inserts can be installed
quickly and easily anywhere and at any stage in the shop or field using Atlas Spin-Pull, Pull-to-Pressure, or Spin-Spin tools. An added benefit is their capability to accommodate applications where only one side of a panel is accessible for hardware installation. In these cases, the inserts can be installed from the ‘front’ side and a single mating screw completes final component attachment. Type AEKM inserts are available in thread sizes #6-32 through 3
/8 -16 and
M4 through M10. They can be specified for panels of any hardness and as thin as 0.020 inches/0.5mm. Most sizes are in stock for same day shipment. (MONEL®
Castparts Corp company PennEngineering®
). 162 Fastener + Fixing Magazine • Issue 74 March 2012
is a registered trademark of Special Metals, a Precision . Atlas®
is a registered trademark of
he new MINIMEB 5mm is a metal hose clamp with threaded band in 5mm width pressed and raised. All the components, band, screw and housing are produced in a low carbon steel with a surface treatment of nickel. The new MINIMEB 5mm is available in diameter 7mm-11mm, 8mm-14mm, 10mm-17mm
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150 |
Page 151 |
Page 152 |
Page 153 |
Page 154 |
Page 155 |
Page 156 |
Page 157 |
Page 158 |
Page 159 |
Page 160 |
Page 161 |
Page 162 |
Page 163 |
Page 164 |
Page 165 |
Page 166 |
Page 167 |
Page 168 |
Page 169 |
Page 170 |
Page 171 |
Page 172 |
Page 173 |
Page 174 |
Page 175 |
Page 176 |
Page 177 |
Page 178 |
Page 179 |
Page 180