Metric Sprockets Overview
TL Taper Bushed Metric Sprockets
TL Sprockets are stocked in a wide variety of sizes which includes ISO 06B, 08B, 10B, 12B, 16B and 20B chain sizes (3/8 to 1-1/4” pitch) for single, double and triple chain. These install with standard TL tapered bushings from 1008 thru 5050 (i.e., thru a 5” or 125mm shaft diameter). TL Sprockets can be found in an array of diameters to support various software speeds. The more popular sizes are stocked with hardened teeth. The C45 material, standard steel sprockets, allows for induction hardening of teeth. So all could be heat treated Hardened Tooth on request. The TL Taper Bushed Sprocket offers a true concentric fit to the shaft. As the TL bushing screws are tightened, the bushing compresses around the shaft securely. Standard hex wrenches are the only tool necessary for installation or removal. After the bushing mounting screws are loosened and eliminated, the screw is re-used and threaded in to the bushing removal hole. Tightening the removal screw will softly loosen the sprocket. PTI stocks both metric and inch bore TL bushings, a standard global design, which explains why the TL sprocket is so versatile. Ease of installation, concentric shaft fit, ideal for higher speeds and weighty loads plus a cost-effective cost, make this the popular choice for new styles and replacement needs. TL sprockets are generally less expensive than custom or completed bored sprockets. Hub Type Metric Sprockets Hub Type Metric Sprockets are available with a minimum simple bore (pilot bore) and some share finished bore sizes. Any shaft size can be done with our customized bore and keyway capacity. Sprockets with hubs are usually suited to the shaft as a clearance fit. They are held in place with two arranged screws and a keyway. Clearance fits are well-known for light loads and gradual speeds. A press fit (or shrink fit to the shaft) is usually favored for higher speeds or heavier loads as they match to the shaft more safely than a clearance fit sprocket. Depending on the clearance of the shaft suit, sprockets may work slightly on the shaft leading to feasible fretting or shaft put on. All regular hub sprockets are available with hardened teeth from stock or on demand. Press fits usually require the sprocket to be heated for set up to increase the bore. As a heated sprocket cools, it shrinks, conforming to the shaft with a 
good grip. A arranged screw secures the main element. The TL Taper Bushed Sprocket will function like the press fit sprocket and generally simpler to install. Plate Type Metric Sprockets Plate Sprockets for solitary, dual or triple strand chain are a cost-effective choice allowing for direct mounting to the clients’ hub or shaft. They are most regularly considered for sprockets above 40 teeth and are available in a wide variety of diameters. Plate type sprockets can be welded or bolted directly to the users’ hub keeping devices compact and light weight. They are available in single, dual and triple tooth configurations as well. Weld on Hubs A Weld-On-Hub is frequently used to simplify mounting, especially large diameter sprockets. PTI stocks regular TL Weld-OnHub sizes. The Weld-On-Hub uses the standard TL bushings as perform most of the other regular drive elements. TL Bushings are stocked in both metric and inch bores. TL Bushings for Weld-On-Hubs or TL Bushed Sprockets TL Taper Bushings for Weld-OnHubs and sprockets are stocked from 1008 thru 5050 sizes covering 5” or 125mm shaft sizes. TL Bushings are well suited for replacements and a contemporary alternative for upgrading clearance suit and press fit sprockets. TL Bushings are used in a multitude of other European and American regular drive products. Stainless Steel Metric Sprockets STAINLESS (AISI 304L) Metric Sprockets provide corrosion resistance and allow wash-down capability. These hub type sprockets can be given a finished bore and keyway. Stainless Sprockets cannot be hardened. PTI stocks sizes from ISO 06B thru 16B (3/8” -1” pitch) and from 12 to 25 & 30 tooth. Larger sizes available on demand. TL Bushed edition also on demand. Metric Idler and Double-One Sprockets Metric Idler Sprockets are plate sprockets with a ball bearing for installation. These sprockets generally provide pressure for the chain drive and can be utilized within a tension arm assembly or separately mounted to put the drive. Share sizes are for sale to ISO 05B thru 20B metric chain sizes. Double-Single Sprockets, well-known on conveyors, allow 2 single chains about the same sprocket to control pairs of rolls or drive devices that must index. Custom Metric or ANSI Sprockets Custom sprockets including huge diameter metal or cast iron models for one, duplex or triple strand chain could be made to order. PTI typically keeps some stock inside our European warehouse, therefore delivery could be rather quick. Additional custom made sprockets sizes for Metric conveyor chain or ANSI chain are also possible. Drawings are preferred to insure requirements are obvious. All are possible with customized finished bore.