Product Detail
PCD Monoblock Face Milling Cutter
PCD monoblock after aluminum sealing leak and ripple rejects from staged-edge seats.
The sealing face looks clean, then fails the leak test or the flatness check. Hold it under a light and faint witness lines repeat across the face at the same spacing as the cutter's edges.
HENTRY makes one-piece PCD face mills for aluminum sealing and joint faces. The PCD edges are brazed into the body and ground together, so their height comes from grinding and there are no setting screws to drift.
Face milling is a supporting line at HENTRY, alongside the holemaking tools we are built around. The full range of PCD milling series is on the PCD milling cutters page.
How a brazed one-piece PCD face mill is made
Body. Carbide or steel, chosen from the diameter and the weight your spindle and tool changer will accept.
Tips and grinding. PCD tips are brazed into seats on the body. All edges are then eroded and ground in one setup, on a VOLLMER QWD760 wire EDM and EWAG grinders. Because all edges are finished in the same clamping, the height difference between them is fixed in manufacturing, and there is nothing for the operator to adjust.
Wiper. One or more wiper edges with a flat land smooth the feed marks on the finish pass.
Edge count and pitch. More edges give a finer finish per revolution; fewer leave room for chips and ask less of the spindle. We choose from face width, available power and chip volume.
Coolant. Outlets aimed at the edges for flood or through-spindle coolant, or a layout for MQL.
Mounting. An integral shank to your spindle standard (e.g. HSK), or a bore for arbor mounting.
Balance. The cutter is balanced as one piece on ZOLLER equipment and checked again after regrind or re-tipping.
Why sealing faces go to a one-piece body
An adjustable cutter leaves each edge at a slightly different height after setting, and each seat has its own stiffness. On a roughing pass that hardly matters. On a finish face the highest edge marks the part once per revolution, which shows as lines at a fixed pitch and can read as waviness on a CMM trace. A ground one-piece body removes edge setting from the list of causes. The evidence that usually points here:
- Ripple or witness lines repeating at the cutter pitch
- Dye, pressure or leak-test rejects after the finish pass
- CMM or dial traces showing waviness at a regular interval
- An operation sheet that already bans adjustable seats on the sealing face
The same marks can also come from the fixture, the clamping pressure, or a thin wall springing under the cut. In that case a new cutter alone may not fix the face. We look at the fixture and wall data you send before proposing a monoblock. Where the face and a bore share datums on one part, see face milling and PCD reaming on the same part.
Monoblock or indexable: choosing between the two
| Question | One-piece (monoblock) | Indexable (cartridge) |
|---|---|---|
| Face width vs body size | Limited by the body diameter the spindle can carry | Covers wider decks with a lighter body |
| Consistency on a finish face | Edge heights fixed by grinding | Depends on how well cartridges are set |
| Replacing worn edges | Whole body returns for regrind or re-tip | Cartridges swapped in your tool room |
| Downtime planning | Keep a backup body on the line | Keep spare cartridges on the shelf |
| Weight at large diameter | Rises quickly with diameter | Lower, with an aluminum body |
| Tool-room skill needed | Low; nothing to set | Presetter and a setting routine |
For wide decks where your tool room manages spare edges, see the PCD indexable face mill.
Regrind, re-tip and a backup body
When the edges wear, the whole cutter comes back to HENTRY. On return we inspect the seats, the braze and the edge-to-edge run-out. Edges are reground where enough PCD remains; otherwise the tips are replaced and the body is ground again as a set. This is part of HENTRY's design-to-regrind service.
The cutter leaves your plant while this happens, so plan a second body for the line. We can propose a two-body rotation with the first order, for your approval.
Configurations
| Feature | Options | Decided by |
|---|---|---|
| Diameter / face width | Per print | Face size, spindle weight and tool-changer limits |
| Body material | Carbide or steel | Diameter, weight, stiffness |
| Edge count | Per design | Face width, power, chip space |
| Wiper | One or more wiper edges | Finish callout on the sealing face |
| Interface | Integral shank (e.g. HSK) or bore mount; if arbor data is the unknown, see shell mill | Spindle standard |
| Coolant | Flood, through-spindle or MQL layout | Machine capability |
| PCD grade | Finer grain for finish; tougher grade for high-silicon cast alloys | Alloy and finish callout |
| Balance | Balanced as one body | Your balance requirement and intended speed |
Not this page
PCD is for aluminum and other non-ferrous faces. Steel and cast-iron sealing faces run on carbide.
| Your job | Go to |
|---|---|
| Wide non-sealing deck, spare edges kept in your tool room | PCD indexable face mill (linked above) |
| Steel or cast-iron face | Carbide indexable face milling cutter |
| Bell or profile form | PCD bell and profile milling cutter |
| Bore size or finish is the scrap | PCD reamer (linked below) |
What to send for a monoblock face mill RFQ
- Leak or flatness reject evidence: photos, CMM plot, witness-line spacing
- Sealing, flatness and surface callouts as written on the print
- Alloy: grade, cast or wrought
- Face size and stock to remove
- Fixture and clamping layout; wall thickness under the face
- Machine, spindle interface and maximum spindle speed
- Coolant or MQL
- Incumbent cutter and how it is set
- Regrind plan: backup body wanted, yes or no
- Batch or annual volume; sample trial yes or no
If you want to prove the cutter on your part first, we can propose a trial under our sample validation process. When the scrap is in a bore, start from the PCD reamer page. Otherwise send the drawing and reject evidence through the custom cutting tool RFQ, and we reply with a proposed cutter design for your approval.
Monoblock FAQ
Is this a spare-edge catalog?
No. This page covers one-piece PCD face mills for aluminum sealing faces, designed from your drawing and reject evidence. Replaceable edges are on the PCD indexable face mill page.
Steel sealing decks?
Use a carbide face mill or shell mill. PCD is for aluminum and other non-ferrous faces, and diamond wears quickly against iron.
What happens when the edges wear?
The whole body comes back to HENTRY for regrind or re-tipping. Plan a backup body so the line keeps running while the first one is away.
Will a monoblock cutter fix ripple on its own?
Only if tool setting is the cause. Fixture, clamping and wall stiffness can leave the same marks, so we check them from the evidence you send.