Portable Flange Facers

Portable Flange Facers


Shenoy Engineering Private Limited, manufacturer of SPMs and in-situ machines, has designed and manufactured hand-held, Portable Flange Facers, which are also known popularly as refacing tools. These flange facers are mainly used in for generating smooth or serrated finish on the flange butting surfaces. Easy to carry, compact in size, light in weight, simple to operate, these flange re-surfacers are affordable and, except for human power, it does not need any source of power like electricity, pneumatic, hydraulic, etc. In other words, this product is fire hazard-free and most ideally suited for flange resurfacing operations in petroleum, chemical refineries.

While designing the product, conscious efforts were put in to keep its weight about 7 kg. Extensive use of aluminium in the structurals made it possible to contain the weight of the flange facer.

This flange facer has a facing range from Ø25 mm to Ø310 mm (Ø1”to Ø12”) and has a clamping range of Ø1” to Ø6”. The main components of this facer, like arm, housing, is cast from aluminium to make it light. Sliding surface is made of LM guides and blocks to provide utmost frictionless smooth movement, keeping in mind the operator’s fatigue. The tool is moved over the LM guides through a leadscrew-box nut arrangement, coupled with a worm reduction gearbox for the mechanical advantage. The input of the worm reduction gearbox has a knob, which can be rotated. The box nut is made of phosphorus bronze, which creates less friction against the lead screw while rotating. The arm on which the slide unit is mounted is connected to rotatable housing. A case hardened hollow spindle is supported by two deep groove ball bearings inside the housing to provide sufficient stiffness against the radial cutting loads while facing. Inside the hollow spindle, a threaded clamp shaft is provided. The spindle also has 3 slots, where 3 jaws are mounted. When the clamp shaft is rotated, a taper provided on the shaft pushes the jaws out of the slot equally, thereby clamping the facer inside the bore and self-centres the flange facers. The tool post, which accommodates single point HSS or inserted carbide tools, is capable of tiling ±45?. It is possible to obtain both serrated and smooth finish, by using different gearboxes. The maximum material removal is nearly 1 mm in mild steel.

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