Fadal CNC Review: Where These Machines Still Pay Off
This Fadal CNC review is written for engineers and buyers deciding whether a VMC with an 88HS control belongs on their next job, and when the geometry should go to a simultaneous 5-axis cell instead. Read it before you commit a part to an older control.
In this article
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What this Fadal CNC review comes down to
Fadal platform vs modern 5-axis cell
Use this to decide which platform a job should be quoted on.
| Criterion | Classic Fadal VMC | Simultaneous 5-axis cell |
|---|---|---|
| Part geometry | Prismatic, 2.5D pockets, drilled patterns | Sculpted surfaces, undercuts, one-setup complex parts |
| Typical tolerance | ±0.025 mm achievable on good iron | ±0.005 mm (±0.0002 in) on our centers |
| Surface finish | Ra 1.6–3.2 μm as-machined | Ra 0.8–1.6 μm, down to Ra 0.2–0.8 μm |
| Setup count | 3–5 setups on a multi-face part | 1–2 setups with RTCP compensation |
| Control feel | 88HS, compact canned cycles | Modern look-ahead, high-speed toolpaths |
| Best batch size | 1 to a few hundred | 1 prototype to 10,000+ runs |
| When to avoid | Continuous contouring, thin-wall finishing | Simple flat plates, cost-sensitive brackets |
The short version
A Fadal is a sound 3-axis workhorse for prismatic parts at ±0.025 mm. For ±0.005 mm, sculpted surfaces or five-face features, move the job to a simultaneous 5-axis cell instead of fighting the platform.
What the Fadal platform actually is
Fadal built vertical machining centers in California for decades, and the machines that still show up in job shops are mostly 40-taper VMCs with a box or linear way construction and a proprietary control. The control is the part people remember. The 88HS uses a compact command set with canned cycles that many programmers find faster to type than a modern conversational interface.
Mechanically, these are straightforward machines. Three linear axes, a fixed or sliding head, a tool changer, and a spindle in the 7.5–15 kW class on most models. Nothing exotic. That simplicity is why parts are still available and why a shop can keep one running for twenty years with regular maintenance.
For an engineer, the practical question is not whether the machine is old. It is whether the work envelope, rigidity and control resolution match the tolerance and finish on the drawing. Those three numbers decide everything else.
- 1Control88HS with a compact, memorizable command structure and solid canned cycles.
- 2Typical spindle7.5–15 kW, 40 taper, adequate for aluminium and light steel cuts.
- 3Accuracy ceilingAround ±0.025 mm on well-maintained iron, not ±0.005 mm.
Which parts belong on this platform
The sweet spot is a part with flat faces, straight walls and a drilled hole pattern. Fixture plates, motor mounts, pump housings, weldment brackets and simple injection mold plates all run well. If the drawing has a true position callout on a bolt circle, a Fadal with a decent 4th axis can index to each face and hold it.
Aluminium is the friendliest material here. 6061, 7075 and 2024 cut cleanly at moderate spindle speeds, and the control handles the tool offsets without drama. Stainless 303 and 304 are workable if you keep the radial engagement low. 17-4PH and titanium will cut, but tool life drops and the finish suffers unless you slow down.
Parts that do not belong here are the ones with free-form surfaces. A turbine blade, an impeller with twisted vanes, or a housing with a blended fillet that wraps three faces needs continuous multi-axis motion. A 3-axis machine can only approximate that with many setups, and the blend lines will show.
- 1Good fitBrackets, plates, housings, fixtures, drilled and tapped patterns.
- 2Marginal fitDeep cavities, thin walls under 1.5 mm, hard steels above 40 HRC.
- 3Wrong fitSculpted surfaces, undercuts, parts needing one-setup accuracy on five faces.
The 88HS control in daily use
Programming on an 88HS feels direct. Canned cycles for drilling, boring and tapping are short, and the fixture offset table is easy to read at the machine. Operators who came up on this control can edit a program at the pendant faster than they can post a new file from CAM.
The tradeoff is toolpath intelligence. Modern controls look ahead through the program and adjust feed rates to keep chip load steady. The 88HS does not do this well. On a long 3D toolpath with many short segments, the machine will stutter and the surface will show it. You compensate by using simpler toolpaths or by accepting a slower feed.
Memory is another limit. Older machines have small program memory, so long programs need drip feeding. That works, but it adds a failure point. If a job depends on a 40,000-line finishing pass, plan the setup around the memory limit rather than discovering it mid-cut.
- 1StrongShort canned cycles, fast at-machine edits, readable offsets.
- 2WeakLook-ahead on dense toolpaths, large program memory, 3D contouring speed.
Where the design runs out of headroom
Accuracy is the first wall. A Fadal in good condition holds around ±0.025 mm. Tighten the tolerance to ±0.005 mm (±0.0002 in) and you are depending on the operator to compensate for thermal drift and tool wear on every part. That is not a process, it is a hope.
Finish is the second wall. High-speed finishing on aluminium wants 15,000 rpm and a controlled chip load. A 40-taper spindle at 7.5–15 kW cannot hold that, so you either accept Ra 1.6–3.2 μm as-machined or add a slow finishing pass that doubles cycle time.
The third wall is setup count. A part with features on five faces needs five orientations on a 3-axis machine. Each re-fixture adds stack-up error and hours. This is where a simultaneous 5-axis center pays for itself, because the part stays in one vise.
- 1Tolerance wall±0.025 mm is realistic. Below ±0.005 mm needs a different platform.
- 2Finish wallRa 1.6–3.2 μm as-machined without a dedicated finishing strategy.
- 3Setup wallMulti-face parts multiply fixtures, handling time and stack-up error.
Buying the work, not the machine brand
Most buyers are not choosing a machine. They are choosing a supplier who happens to run one. That changes the questions. Ask what tolerance the shop will certify, how it inspects, and what happens when a part drifts out of tolerance halfway through a run.
At GreatLight we run 127 high-precision CNC machines across three wholly-owned plants, including 16 simultaneous 5-axis centers, 12 four-axis mills and 27 three-axis machines. When a job fits a 3-axis platform, we quote it there. When the geometry or tolerance does not fit, we move it to a 5-axis cell rather than fight it on older iron.
The commercial terms matter as much as the spindle. We hold ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. There is no minimum order quantity, so a single prototype and a 10,000-part run go through the same process. Uploads stay confidential and an NDA is available on request.
Quotation and a free DFM analysis come back within 12 hours. Production can start within 24 hours, and parts ship in 3–5 days. Historical late-delivery probability is below 2%. Every part gets 100% inspection before shipment, with raw material checks, in-process monitoring and a final report on request.
- 1Certify the toleranceAsk for the number the shop will stand behind, not the drawing number.
- 2Match platform to geometry3-axis for prismatic work, 5-axis for sculpted or multi-face parts.
- 3Check the paper trailISO 9001, IATF 16949, ISO 13485 and ISO 27001 cover most regulated buyers.
How to evaluate a Fadal before you quote on it
Run these checks in order. Any failure at step 2 or 3 usually ends the discussion.
- 1Check the geometry on the drawingCount how many faces carry features. If more than three faces need tight location, budget for a 5-axis quote instead.
- 2Inspect the way surfaces and ballscrewsLook for scoring on the rails and backlash at the screw. A quick backlash check with a dial indicator: anything above 0.02 mm means compensation or rework.
- 3Run a spindle sweepIndicate the taper with a test bar. TIR above 0.01 mm at 100 mm from the gauge line will show up in your bore tolerances.
- 4Cut a test part in the actual materialMachine a pocket and a bolt circle, then measure. This catches thermal drift and control errors that a static check misses.
- 5Check program memory and drip feedLoad a finishing program and confirm it runs without stalling. Test the drip feed link before the job is on the machine.
- 6Confirm the tolerance you can promiseWrite the achievable tolerance on the traveler, not the drawing tolerance. If they differ, the part needs a different machine.
Fadal CNC review questions we get
Can a Fadal hold ±0.005 mm?
Not as a process. A well-maintained machine holds around ±0.025 mm. Pushing to ±0.005 mm depends on the operator compensating for thermal drift and tool wear on every part, which is not repeatable across a run.
If your drawing calls for ±0.005 mm (±0.0002 in), quote it on a machine that holds that tolerance without operator intervention.
Does the 88HS control still get support?
The control is well documented and the command structure is widely known, so operators and programmers are available. Third-party repair and board-level service exist for most models.
The practical risk is not the control itself but the electronics around it. Budget for spare boards if the machine is critical to a production line.
What finish can I expect as-machined?
Ra 1.6–3.2 μm on aluminium and mild steel with a reasonable finishing pass. Stainless and harder alloys will be rougher unless you slow the feed.
If the drawing specifies Ra 0.8–1.6 μm or better, plan a finishing operation or move the part to a higher-speed spindle.
When should I move a job to 5-axis instead?
Three signals: features on more than three faces, free-form surfaces, or a tolerance tighter than ±0.025 mm. Any one of those usually makes the 5-axis route cheaper once you count setups and scrap.
On our 16 simultaneous 5-axis centers we hold ±0.005 mm with RTCP compensation and finish at Ra 0.8–1.6 μm in one or two setups.
Is a used Fadal worth buying for a job shop?
It can be, if the way surfaces, ballscrews and spindle are sound. Those three items decide the real price. A cheap machine with a worn spindle is expensive.
For low-volume prismatic work in aluminium, the economics still work. For tight-tolerance or sculpted work, the money is better spent on a modern platform.
What information do you need for a quote?
Send the 3D model, 2D drawing with tolerances and finish callouts, material, quantity and any inspection requirement. That is enough for a DFM review.
Quotation and free DFM analysis come back within 12 hours. Uploads are secure and confidential, and an NDA is available on request.
Send the drawing, get a platform recommendation
Upload your model and we will tell you whether the part belongs on a 3-axis platform or a 5-axis cell, with a quote and free DFM analysis inside 12 hours.
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More machining notes
We publish setup notes, tooling trials and inspection data from the factory floor.
