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Master Cylinder

Cylindrical squares, used on surface plates, provide one of the most reliable 90° reference standards available in the industry today. Work may be placed against the periphery and sighted for checking squareness, right angle by comparison method. Master cylindrical squares are also used for checking the squareness of the vertical axis to the horizontal axis of numerically controlled machining centres. Luthra master cylindrical squares are made of high quality alloy steel, scientifically heat treated for maximum stability and wear resistance. The periphery is ground between centres straight and round within the tolerance specified for each size, with an extremely fine micro finish. The ends, recessed are ground and lapped square with the axis within the specified tolerances as per IS 6952:1990. Each square is packed in a finished wood case with hinged cover.

Luthra Cylindrical squares are supplied with calibration certificate traceable to National Physical Laboratory (NPL, Govt.Of India) New Delhi.

Standard Size and accuracy of Luthra Master Cylinder as per IS 6952:1990. Grade 1

Length mm	Diameter mm	Accuracy um
75	50	3
150	70	3
225	90	5
300	95	5
450	120	7
600	140	9

*Other Sizes On Request

Taper Mandrel

Taper mandrel are also called as inspection mandrels and are used for checking the alignment of machine spindle axis. These taper mandrels are made of hardened and stabilised steel. Mandrels are provided with properly ground and lapped centres for easy usage and accuracy. In morse tapers, the Taper mandrel are self holding in the socket and in ISO tapers, a tapped hole is provided for fixing the mandrel with a threaded retaining pin.

Standard sizes and accuracy of Luthra Taper Mandrel As per IS-2063:1962.

Taper	Length (mm)
MT-2	300
MT-2	500
MT-3	300
MT-3	500
MT-4	300
MT-4	500
ISO - 40	300
ISO - 40	500

*Other Sizes On Request

Straight / Parallel Mandrel

Straight mandrel and parallel mandrel are also called as inspection mandrels and are used for checking concentricity, parallelism and true running of components. Mandrel mounted between centres provides a reference straight line joining the two points (centres), so as to check the alignment of the centres. Parallel mandrels are made of hardened and stabilised steel. Mandrels are provided with properly ground and lapped centres for easy usage and accuracy.

Standard sizes and accuracy of Luthra Straight Mandrel and Parallel Mandrel As per IS-2063:1962.

Parallel/Straight Mandrel
Diameter (mm)	Length (mm)
40	300
40	500
40	600
50	300
50	500
50	600
60	300
60	500
60	600

*Other Sizes On Request

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