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Distributor's Link Magazine Fall 2021 / Vol 44 No 4

10 THE DISTRIBUTOR’S

10 THE DISTRIBUTOR’S LINK Bruno Marbacher Bruno Marbacher earned his mechanical engineering degree in Switzerland, he also holds a business degree. He started out as a tool and die maker (poly-mechanic) and over the years he has held various management positions in quality and engineering. During his time in America he has developed and given numerous seminars on topics related to the proper use of mechanical fasteners and machine elements, and assists engineers in solving fastening/assembly issues. His has groomed and directed many young engineers in fastening/assembly technology. He now offers his 40 years of experience through writing and lecturing. DRIVING SYSTEMS FOR FASTENERS – THE VERTICAL WALLED SYSTEMS Dear Reader - in this article we cover vertical walled drives, all kinds of socket drives. We listed the critical functional features again; the details were described in the first article (summer 2012 issue) we will cover the most commonly used vertical wall drives. Critical Drive Features To choose a screw with certain drive there are several things to be consider. The Critical Functional Features are: ¤ Amount torque it can absorb. ¤ Off-angle driver to drive. ¤ Ease off alignment/engagement ¤ Cam-out, tendency to push driver out. ¤ Durability of drive, repeated assembly ¤ Good Stick fit, hold driver in drive. ¤ The effect of the coatings on driver engagement ¤ Tamperproof, preventing unauthorized access. ¤ Its worldwide availability Hex/Allen Hex socket drive is the first internal wrenching hexagon. It was developed by Standard Pressed Steel Company (SPS) in Philadelphia USA in 1911. SPS gave it the tradename “Unbrako”. The German company Bauer & Schaurte patented the hex socket in 1936 in Germany, and marketed the products as “inbus”, commonly but incorrectly called “imbus”. Inbus is derived from Innensechskant (Inner 6-edge) TECHNICAL ARTICLE In the USA the term “Allen key” is often used. The hex socket screw drive has a hexagonal recess and may be driven by a hex wrench, also known as an Allen wrench, Allen key, hex key, or inbus as well as by a hex screwdriver. Feature & Concerns: ¤ Originally designed for machine tools so screws could be recessed (for machine tools, heads should not protrude to prevent injuries) ¤ Thick coating as well as zinc flake coatings may not fill the socket at all or fill up, may over-bridge smaller sockets, this is a concern for other socket products for sizes M5 (#10) and up for socket set screws M8 (5/16) and up. Some coating applicators have special centrifuges (special processes) that alleviate these issues. ¤ The socket drive does not perform well in shallow head designs (button heads, low heads etc.). sockets may be reamed out (corner being rounded) making the drive unusable ¤ Except for the shallow sockets they offer a great a stick fit characteristic. On shallow socket a pilot hole on the bottom of the drive can improve stick fit. ¤ This drive has a poor off-angle capability. Special keys can improve that. This is essentially true for all socket products. Very commonly used worldwide for high torque applications ¤ These drives are more likely to be found on set screws and machine screws than on wood screws. CONTINUED ON PAGE 102

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  • Page 53 and 54: MID-WEST FASTENER ASSOCIATION TABLE
  • Page 55 and 56: MW COMPONENTS TEL 203-888-2133 EMAI
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    60 THE DISTRIBUTOR’S LINK SOLUTIO

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    62 THE DISTRIBUTOR’S LINK ENGINEE

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    64 THE DISTRIBUTOR’S LINK Anthony

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    THE DISTRIBUTOR’S LINK 67 SPIROL

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    70 THE DISTRIBUTOR’S LINK Abigail

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    THE DISTRIBUTOR’S LINK 73 The Aut

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    76 THE DISTRIBUTOR’S LINK NORTH C

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    78 THE DISTRIBUTOR’S LINK INDUSTR

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    80 THE DISTRIBUTOR’S LINK

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    THE DISTRIBUTOR’S LINK 83

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    86 THE DISTRIBUTOR’S LINK Interna

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    MID-WEST FASTENER ASSOCIATION TABLE

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    NYLOK THE DISTRIBUTOR’S LINK 93 1

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    MID-WEST FASTENER ASSOCIATION 68th

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    100 THE DISTRIBUTOR’S LINK ROB La

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    102 THE DISTRIBUTOR’S LINK BRUNO

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    THE DISTRIBUTOR’S LINK 105 CHRIS

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    SPECIALTY SALES REPS THE DISTRIBUTO

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    THE DISTRIBUTOR’S LINK 109 The Gi

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    112 THE DISTRIBUTOR’S LINK FASTEN

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    MID-WEST FASTENER ASSOCIATION 68th

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    118 THE DISTRIBUTOR’S LINK JOE DY

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    120 THE DISTRIBUTOR’S LINK LAUREN

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    124 THE DISTRIBUTOR’S LINK ALL-PR

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    MID-WEST FASTENER ASSOCIATION 75th

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    THE DISTRIBUTOR’S LINK 131 NATION

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    THE DISTRIBUTOR’S LINK 135 SMALLE

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    THE DISTRIBUTOR’S LINK 137 NELSON

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    THE DISTRIBUTOR’S LINK 139 ENGINE

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    142 THE DISTRIBUTOR’S LINK SPIROL

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    144 THE DISTRIBUTOR’S LINK BATCHI

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    146 THE DISTRIBUTOR’S LINK ABIGAI

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    148 THE DISTRIBUTOR’S LINK LEN La

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    OPEN HOUSE - JULY 8, 2021

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    fastenerlinks THE DEFINITIVE WEB DI

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    fastenerlinks BRINGING YOU THE FAST

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    fastenerlinks BRINGING YOU THE FAST

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    THE DISTRIBUTOR’S LINK 159 LARRY

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    MID-WEST FASTENER ASSOCIATION MIXER

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    164 THE DISTRIBUTOR’S LINK JOE DY

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    166 THE DISTRIBUTOR’S LINK LAUREN

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    168 THE DISTRIBUTOR’S LINK ALL-PR

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    170 THE DISTRIBUTOR’S LINK ROBERT

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    172 THE DISTRIBUTOR’S LINK ROB La

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    174 THE DISTRIBUTOR’S LINK BRUNO

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    NCFA 12th ANNUAL DISTRIBUTOR SOCIAL

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    MID-WEST FASTENER ASSOCIATION 75th

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    MID-WEST FASTENER ASSOCIATION 75th

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    THE DISTRIBUTOR’S LINK 183 ALL-PR

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    advertisers index # 3Q, INC. 83 Was

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    advertisers index I INDUSTRIAL RIVE

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