A deep hole drilling machine needs a written maintenance plan tied to operating hours, the supplied manuals and recorded trends—not memory. Before each shift, verify lubrication, coolant level and condition, filter status, pressure indication, guards, alarms and the work zone. Weekly, inspect chip return, tool guidance, hoses, covers and visible leaks; monthly, review records, clean tanks as required and check axis, spindle and safety observations against the supplier’s limits. Never invent universal replacement intervals: use the purchased machine’s component manuals and shorten intervals only when documented contamination, temperature or duty data justifies it.
1. Start every shift with an eight-point inspection
Check lubrication, coolant level, coolant appearance, filter indication, pressure indication, guards, alarms and work-zone cleanliness. Recording these 8 items before cutting creates a repeatable starting condition.
2. Record coolant pressure under a defined condition
A pressure reading is useful only when the measurement point, operating state and tool are identified. Representative HYM specifications list maximum oil pressure up to 100 kgf/cm², but the normal setting is process-specific and must follow the approved setup.
3. Trend coolant temperature instead of judging by touch
Record temperature at the same point and stage of the cycle so readings can be compared. Use at least 2 values—cycle start and cycle end—and investigate changes against the agreed operating limits.
4. Inspect chip evacuation over the full drilling cycle
Observe chip form and return from entry to final depth because a short trial may not reveal restriction. For a Ø10 mm hole drilled 600 mm deep, the 60:1 depth-to-diameter ratio makes full-depth observations more meaningful.
5. Inspect five coolant-circuit areas each week
Review the clean-oil supply, high-pressure lines, tool connection, dirty-oil return and filter area. These 5 locations cover both delivery and chip-removal paths.
6. Check tool guidance and entry components
Inspect guide condition, alignment surfaces and fasteners using the machine and tooling supplier’s criteria. Log the tool diameter and guide identification as 2 traceability fields before adjustment or replacement.
7. Check covers, hoses and visible leaks
Walk the machine perimeter and inspect moving covers, cable carriers, coolant hoses and hydraulic or lubrication connections. Classify every finding into 3 states: acceptable, monitor or corrective action required.
8. Review alarms and corrective actions monthly
Group alarms by subsystem instead of clearing them without analysis. A monthly review should contain at least 4 fields: alarm code, frequency, operating condition and corrective action.
9. Verify safety devices according to the manual
Test interlocks, emergency stops and other specified safety functions only by the approved procedure. Record the device, method, result, date and responsible person—5 audit fields for each check.
10. Use condition and hours to plan service
Compare calendar time, spindle or machine hours and recorded condition before scheduling work. These 3 inputs are more defensible than a generic interval copied from another machine.
11. Keep one maintenance history for each machine
Link every inspection, measurement, alarm and repair to the machine serial identity. Each record should include at least 6 fields: date, operating hours, check, measured result, action and technician.
12. Build the spare-parts list from the delivered configuration
Ask the supplier for part numbers and quantities for filters, seals, wear items, lubrication consumables and critical sensors. These 5 categories are a planning framework; the final list must match the machine bill of materials.
| Frequency | Primary checks | Evidence |
|---|---|---|
| Each shift | Lubrication, coolant, filters, pressure, guards, alarms | Signed checklist and readings |
| Weekly | Chip return, guidance, hoses, covers, leaks | Condition status and action |
| Monthly | Alarm trends, records, safety procedures, planned service | Review report and work orders |
| Manual-defined | Component replacement and specialist service | Hours, part number and service record |
Before shipment, request the maintenance schedule, lubrication chart, consumables list, spare-parts list and service contacts. These 5 documents should be checked during FAT and delivered with the machine.
Frequently asked questions
How often should a deep hole drilling machine be inspected?
Operators should complete shift-level checks before production, with weekly and monthly tasks defined by the machine manual, operating hours, coolant condition and site environment.
Which maintenance records are most useful?
Record coolant pressure and temperature, filter condition, lubrication level, alarm history, spindle or axis observations, corrective action and the responsible person with date and operating hours.
Can one maintenance interval apply to every machine?
No. Final intervals must follow the supplied machine, component and tooling manuals and should be adjusted from documented operating conditions and trend data.
What spare parts should be ordered with a new machine?
Request a machine-specific list covering filter elements, seals, wear items, lubrication consumables, sensors and other supplier-identified parts, including part numbers and recommended quantities.
Use the coolant-system specification guide to define measurable checks, include documentation in the machine FAT checklist, and review HYM service and support.