26) 'V' grooves of cast iron pulley have to be fine turned. Which one of the following work holding methods gives the highest concentricity ?
holding on cone mandrel and machining between centres
Related Lathe Accessories MCQ - Turner (Set-1) with Answers
After mounting the face plate on the spindle nose and keeping the spindle in neutral position
When machining irregularly shaped workpiece held in face plate, counterbalancing is done by clamping weights. This is done After mounting the face plate on the spindle nose and keeping the spindle in neutral position.
support long workpiece held in chuck, to perform operations at the overhanging end
A fixed steady rest is used to support long workpiece held in chuck, to perform operations at the overhanging end.
Face plate
Faceplates are used to hold work that is too large or of such a shape that it cannot be held in a chuck or between centers. Faceplates are equipped with several slots to permit the use of bolts to secure the work, so that the axis of the work-piece may be aligned with the lathe centers. When work is mounted off – center, a counterbalance should be fastened to the faceplate to prevent imbalance and the resultant vibrations when the lathe is in operation.
To prevent bending of long shafts due to cutting force
A travelling steady is fixed on the saddle of a lathe. What is the function of this steady rest is to prevent bending of long shafts due to cutting force