Reducing Bushing Adapter with Drip Tip, BORO 3.3 Glass

Description

The Reducing Bushing Adapter with Drip Tip, BORO 3.3 Glass, also known as a ground glass reducing bushing, glass joint reducer or laboratory bushing adapter, is designed to connect laboratory glassware components with different standard taper joint sizes. Manufactured from borosilicate 3.3 glass, this adapter provides a compact connection between a smaller male ground glass joint and a larger female ground glass joint. Unlike conventional reducing adapters with an extended connecting section, the bushing incorporates a shorter internal socket and full-length external cone, allowing dissimilar glass joints to be assembled with minimal additional height.

The internal female socket receives the appropriately sized male joint of the upper glassware component. The larger external male cone fits into the corresponding female socket of the receiving apparatus. This arrangement is useful when laboratory flasks, condensers, adapters and other interchangeable glassware components have different joint dimensions. The adapter features an integrated glass drip tip at its lower outlet, helping guide liquid droplets towards the connected receiving vessel during suitable transfer or condensation procedures. Its thick-wall construction provides additional mechanical strength compared with thinner glass sections, although careful handling remains necessary to prevent breakage.

A reinforced upper rim provides a convenient gripping surface, assisting users when positioning or removing the bushing from assembled glassware. The use of BORO 3.3 glass provides low thermal expansion and resistance to many laboratory chemicals, making the adapter suitable for a range of compatible chemical procedures. Borosilicate glass is commonly used in laboratory glassware because it can withstand temperature changes better than ordinary soda-lime glass under appropriate operating conditions. The bushing design is particularly useful in distillation apparatus, where differently sized ground glass components may need to be connected without substantially increasing the assembly height. It may also be incorporated into suitable reflux and chemical synthesis setups, providing a connection between compatible glassware joints.

For laboratory setups with restricted vertical clearance, the compact construction helps minimise the additional space required between connected components. The range includes three DIN joint combinations, each identified by its internal socket size and external cone size. The 10/19 socket to 14/23 cone variation accommodates smaller ground glass components, while the 14/23 to 19/26 variation provides an intermediate connection. The 19/26 socket to 29/32 cone option is intended for applications requiring a larger external ground glass connection. Joint notation identifies the nominal joint diameter and ground length in millimetres. Both dimensions must match the corresponding glassware connection.

Safety Precautions: Inspect the adapter for cracks, chips and joint damage before use. Support connected apparatus with suitable laboratory clamps and avoid forcing ground glass joints together. Verify chemical, temperature and pressure compatibility before operation. For vacuum or heated applications, the complete apparatus must be assessed for suitability. A matching joint size alone does not establish a pressure-tight or vacuum-tight connection.

LabChoice Australia supplies BORO 3.3 laboratory glassware, ground glass adapters and distillation accessories for universities, research laboratories, chemical testing facilities and industrial laboratories across Australia.