M.A. Ford
M.A. Ford HPDCR 0840A Twister HPD Coolant Drill 5X 8.40 mm
Coolant-fed drill bit for high-performance drilling at 8.40 mm diameter
- Precision drilling with 8.40 mm coolant-fed design
- Five-times diameter reach for deep-hole applications
- High-performance Twister HPD geometry improves chip evacuation
- New condition ensures full factory specifications
- California Prop 65 warning for chemical awareness
8.40 mm Twister HPD coolant drill
The M.A. Ford HPDCR 0840A is a 5X diameter coolant-fed drill built for high-performance drilling in demanding materials. It targets machinists and maintenance teams who need reliable hole-making with internal coolant delivery. The 8.40 mm diameter suits precise metric hole requirements in production environments.
Thermal and power behaviour in normal use
Internal coolant channels direct fluid to the cutting zone, controlling temperature during extended drilling cycles. This reduces thermal stress on both tool and workpiece while supporting consistent chip evacuation. Power draw follows the machine spindle load and varies with material hardness and feed rate.
Build quality and daily mounting implications
The solid carbide construction with proprietary coating resists wear in abrasive alloys and high-temperature alloys. A cylindrical shank fits standard tool holders and collets without adapters. California Proposition 65 notices apply: the product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Highlights
- Precision drilling with 8.40 mm coolant-fed design
- Five-times diameter reach for deep-hole applications
- High-performance Twister HPD geometry improves chip evacuation
- New condition ensures full factory specifications
- California Prop 65 warning for chemical awareness
Specifications
| Brand | M.A. FORD |
|---|
Questions about this item
How do I install the 8.40 mm coolant drill and which step is most often missed?
Clamp the drill in a rigid holder, align the coolant ports with the machine supply, and torque the collet to the maker's spec; the step most often missed is verifying coolant flow before starting the cut.
What maintenance or replacement will the 8.40 mm Twister HPD drill need later?
Inspect the cutting edges after each job, re-sharpen or replace the drill when flank wear reaches the maker's limit, and flush the internal coolant passages regularly to prevent blockage.
What limit appears first on the 8.40 mm drill during sustained high-speed drilling?
The cutting edges reach their wear limit before the coolant channels or shank show fatigue, so tool life is governed by edge degradation under continuous load.
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