Test Chart for Radial Drilling Machines

Baseplate:*

Baseplate flat or level in longitudinal direction

mm 0.1 per 1,000 mm

0.1 per 1,000 mm

Column:*
Column square with baseplate in plane through centre line of baseplate (seeve inclined towards the front side)
For machines upto 1,400 mm (4 ft. 7 in.) length of radial arm (maximum spindle radius)
For machines of over 1,400 mm (4 ft. 7 in.) length of radial arm

0 to 0.2 per 1,000 mm

0 to 0.3 per 1, 000 mm

Arm:*
Arm parallel with baseplate (dipping at outer end): For machines upto 1,400 mm (4 ft. 7 in.) length of radial arm
For machines of over 1,400 mm length for radial arm

0 to 0.2 per 1,000 mm

0 to 0.3 per 1,000 mm

Drilling spindle:*
Taper of spindle for true running; maximum amount by which mandrel 300 mm (12 in.) long may run out

Ditto, in plane perpendicular to said plane

Feed of spindle sleeve square with base plate in plane through centre line of base plate (inclined at lower end towards column)

Working accuracy of machine is assured:
Maximum permissible deflection of arm in the extreme position of saddle, when applying the maximum diameter of drill at the proposed feed according to table TI given below, provided that the baseplate is grouted in and bolted to the foundation farm raised to half its vertical movement on the column)
*With all measurements, the arm is to positioned halfway up the column and the saddle halfway along the radial arm.
**Measurements taken in the following four positions:
Radial arm raised to one-third and two thirds of its vertical movement, Drilling­ spindle axis in each case at approximately 300 mm (12 in,) and two-thirds of radial arm length, Trammel arm 250 mm (10 in,) long.