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Taper-Lock Bush

About Taper-Lock Bush

Using NMTG Taper-Lock Bushes, it is possible for unskilled labour to achieve 'shrink fit' of Pulleys, Couplings, Weld-on hubs etc. on to shafts only using a hexagon wrench. It changed from the traditional design and now features easy-on, easy-off construction and high standardization. The Taper Lock bush, also referred to as a Taper bush or Taper Fit bush, is a locking mechanism commonly used in Power Transmission Drives for locating pulleys, sprockets, and couplings to shafts.

The arrangement of half-threaded holes and longitudinally split tapered bushes ensure maximum grip and fast, easy fitting. The outside of the bush is tapered to match the component bore that is to be located on the shaft. Tightening of the screws into the threaded holes in the hub forces the bush into the taper bored components, thereby effectively contracting the bore of the Taper-Lock Bush until the equivalent of a shrink fit is obtained.

The Taper lock bush is manufactured from precision Cast Iron, Steel & Stainless Steel and is machined to a high quality finish. We can offer other materials according to the customer requirements. We can also do surface coating according to the customer requirement. Taper bushes are available in both imperial and metric shaft sizes.

How To Order

Example: (1) NTB 2517 – PB (Pilot Bore) (2) NTB 2517 – 40 mm

NTB 2517: BUSHING SIZE

The Taper-Lock bushing size is defined by 4 digits representing two numbers. The first two digits represent the maximum bore size (in inches) and the second two digits represent the bushing length (in inches). For example, product number 2517 has a Approx. max. Bore of 2.5" and a total approx. length of 1.7".

Advantages

    • Ease of installation and removal
    • Saves time and cost in fitting.
    • Eliminates precision taper fitting keys.
    • Interchangeable between many products.
    • Taper bored components can be transferred to other diameter shafts by fitting alternative bore bushes.
    • Convenience in dismantling for maintenance and component replacement.
    • Taper Lock bushes work effectively on shaft diameters of: Nominal +0.051 mm /- 0.127mm.
    • Best results are achieved with an ISO h6 tolerance. For shafts up to 100 mm diameter, an affordable forged h9 shaft can be used. To be used with or without key.

Taper-Lock Bush