LEE IMH 18mm Short Betaplug ® The Lee Company’s Industrial MicroHydraulics Group (IMH) introduces the latest addition to our Short Betaplug® product line. The new 18mm Short Betaplug is a pre-assembled, onepiece, tapered expansion plug specifically engineered to seal fluid passages in metal and plastic housings leak-tight, for life, without the use of threads, sealants, or O-rings. With the release of this new size plug, the IMH Group continues to expand the depth of the Short Betaplug product line. The unique, tapered design of the Short Betaplug features controlled expansion during installation that causes the lands and grooves on the O.D. of the plug body to bite into the wall of the fluid passage, creating a leak-tight seal and assuring retention. The tapered design also eliminates the tight manufacturing tolerances and extra machining necessary with cylindrical expansion devices or threaded plugs, and allows engineers to minimize the wall thickness required around the plug, even for brittle housing materials. Controlled Expansion - Ensures Consistent Performance - Eliminates Cracking of Brittle Materials ■ One-Piece Design - Facilitates Reliable Automated or Manual Installation ACTUAL SIZE No Threads or Sealants Required - Reliable Seal for Life - No Extra Machining Necessary (As Installed) Maximum Passage Diameter GAGE LENGTH PLUG All dimensions in millimeters, except where noted. Lee Betaplug Advantage Conventional, cylindrical shaped expansion plugs require additional expansion for the clearance between the plug O.D. and the installation hole. The matching tapers of the Betaplug and its installation hole create a perfect fit, eliminating the need for additional Known Boss Stress expansion. Since the Betaplug’s expansion is precisely controlled by the size of the tapered pin, the amount of expansion and any resulting boss stress is completely predictable. pressures may be higher depending on specific application requirements. Contact your Lee Sales Engineer for higher pressure requirements. The Lee Company – IMH Group, 82 Pequot Park, Westbrook, CT 06498 Tel: 860-399-6281 • eMail: [email protected] Fax: Order Entry: 860-399-7058 / Technical Info.: 860-399-7037 www.leeimh.com

industrial microhydraulics The installation hole for the 18mm Short Betaplug has an included taper angle, Beta, of 4.5°, which matches the tapered outside diameter of the Short Betaplug. This included draft angle of 4.5° is very easy to achieve with a core pin in a die-cast or molded part, or to machine using a tapered tool. A tolerance of ±0.5° on the taper angle of 4.5° is specified to guarantee that the Short Betaplug’s rated performance is achieved. If the taper angles are out of tolerance, the plug will either wedge first at the top or at the bottom, reducing sealing burst pressure. Tapered...