Automated Multi-Spindle Drilling Machine
MTP's automated multi-spindle drilling machines are of a gantry design and have three drilling heads. Each head is equipped with 7 spindles to drill shear pin holes in 21 roof bolts and nuts simultaneously. The spindles are set on a 50mm centre to centre pitching and each spindle has an ER20 style mounting with a maximum drilling capacity of 13mm. The dual sided manually operated shuttle table allows increased through put with one side being manually unloaded and loaded whilst the other side is running an automated drilling cycle. Each side is equipped with nut guides and drill bushes for accurate drilling. Each table has hardened steel strips with positioning notches to prevent wear. Coolant system. Safety guards.
Specifications
Maximum length of bars | 3m |
Pin Diameter | Ø4 to Ø5mm |
Typical production output
Based on Ø20mm bars x 2m long at 5kg each; produced on a single 8-hour shift basis for 22 workdays per month at a 70% efficiency with one loader/operator/unloader (of bars fitted with nuts) | |
Typical drilling cycle time | 20 sec / 21 bolts on front table (whilst loading on the rear table) |
Load & index time to next drill | 40 sec to complete loading next 21 bars on rear table |
Overall cycle time | 60 seconds for 21 bolts (at 100% efficiency) |
Production rate/day | 7,000 bolts per 8-hour shift at 70% efficiency |
Production rate/month | 750 tons per month (for 22 single-shift days at 70% off) |
Manpower | 3x persons (1x operator and 2x loader/operator) |