Test Chart for Vertical Milling Machines
 |
||||||||
Test Chart for Vertical Milling Machines
Test Chart for Vertical Milling Machines -
| Test to be Applied | Permissible Error |
| Levelling of work table: Work table fiat or level in longitudinal direction |
mm ±0'04 per 1,000 mm |
| Ditto, in transverse direction | ±0'04 per 1,000 mm |
| Cutter spindle: Internal taper of cutter spindle runs true: (1) Nearest to spindle nose (2) At a distance of 300 mm (12 in.) |
0.01 0.02 |
| External taper runs out of truth | 0.01 |
| Cutter spindle for axial slip in machines
with up to 50 mm (2 in.) dia. of
front
bearing Over 50 mm (2 in.) dia of front bearing |
0.01 0.02 |
| Work table: Rise and fall of table, in its longitudinal movement Addition: over 500 mm movement 0'01 per 500 mm |
0.02 per |
| Work table square with cutter spindle in plane through longitudinal axis of machine (tum round method; table rising towards the front side only) | 0 to 0.02 per 300 mm |
| Work table square with cutter spindle in plane through longitudinal axis of machine (tum round method) | 0.02 per 300 mm |
| Surface of work table parallel with its transverse movement | mm 0.02 per 300 mm |
| Centre T-slot parallel with longitudinal table movement | 0.02 per 300 mm |
| Centre T-slot square with transverse table movement | 0.02 per 300 mm |
| Width of T-slots : From 10 to 12 mm (3/8 to 1/2 in.) From 14 to 18 mm (9/16 to 3/4 in.) Over 18 mm (3/4 in.) |
0 to + 0.015 0 to + 0.02 0 to + 0.025 |
| Column: Vertical adjustment of cutter slide square with work table in plane through longitudinal axis of machine (table rising to wards the front side) |
0 to 0.02 per 300 mm |
| Ditto, in plane perpendicular to that through longitudinal axis | 0.02 per 300 mm |
| Column ways for knee square with work table, inclinC'J towards front and rear side respectively | 0.02 per 300 mm |
| Ditto, lateral incline | 0.02 per 300 mm |
|
||||||||
|
||||||||