Aluminium Polishing for Indian Manufacturers
Magnetic polishing for aluminium parts — deburring, edge rounding and brightening in one cycle
Aluminium parts are polished on a magnetic polishing machine using stainless steel pins in a water and brightener solution: the rotating magnetic field drives the pins across the part to deburr edges, clean internal holes and brighten the surface without changing dimensions.
Aluminium is soft, smears under abrasive belts, and loads up buffing wheels quickly. That is why magnetic pin polishing suits it so well — the pins do mechanical work at low pressure, so edges are deburred and holes cleaned without gouging the surface or rounding critical features.
Precinova supplies, installs and services these machines across India from Ambala, Haryana, with sample trials on your own aluminium parts before purchase.
Recommended machines for aluminium work
| Model | Best for | Batch capacity | Bucket |
|---|---|---|---|
| PMPM-00035 | Small aluminium fittings, precision parts, trials | 8–10 kg | Φ350 mm |
| PMPM-00050 | CNC job shops running mixed aluminium batches | See specifications | See specifications |
| PMPM-18050 | Steady production volumes of castings and machined parts | See specifications | See specifications |
Which aluminium parts suit magnetic polishing
Magnetic polishing is at its best on small to medium parts with features a wheel cannot reach:
- CNC-machined aluminium components with burrs on cross-drilled holes and internal threads
- Die castings needing flash and parting-line cleanup before anodising
- Extruded profile cut pieces with saw burrs on both faces
- Heat sinks and fin sections where a buffing wheel cannot enter the gaps
- Aluminium hardware and fittings needing a uniform bright finish across a whole batch
Why it works without damaging soft aluminium
The pins are driven magnetically rather than pressed mechanically, so contact force stays low and consistent. Material removal is measured in microns — enough to take off burrs and oxide, not enough to affect tolerances. Because the process runs wet with brightener, the surface comes out clean and passivated rather than smeared with compound.
Cycle times are typically 5 to 15 minutes for a whole batch. Forward and reverse field control ensures pins reach both sides of a feature instead of packing into one corner.
Where magnetic polishing works best on aluminium
Use a magnetic polishing machine when the goal is deburring, hole cleaning, oxide removal and an even bright finish across batches of small precision parts. The process is especially effective where fixed belts and brushes cannot reach internal features.
A sample trial confirms whether the pins can reach the burr root and deliver the required brightness without affecting critical dimensions.
Set-up and consumables for aluminium
For aluminium we recommend confirming pin diameter and length against the smallest hole on the part during the trial, and dosing brightener to the batch water volume as specified. Under-dosing shows up as dull patches; over-dosing simply wastes consumable.
Get a quote & spec sheet
Send your part details and we'll reply within 24 hours with a quote, specifications and the recommended model.
Frequently asked questions
Can a magnetic polishing machine polish aluminium?
Yes. Aluminium, along with brass, copper, stainless steel, titanium and zinc alloy, is a standard material for magnetic pin polishing. The pins deburr, clean internal holes, remove oxide and brighten the surface in one wet cycle.
Will it change the dimensions of my aluminium part?
Material removal is in the micron range — it takes off burrs and oxide rather than base material, so dimensional tolerances are not affected on normal machined or cast parts.
Can I polish aluminium before anodising?
Yes, magnetic polishing is commonly used as the deburr and clean step before anodising, because it removes flash and parting lines and leaves a uniform surface for the coating.
How long does one aluminium batch take?
Typically 5 to 15 minutes per batch depending on burr size and finish required. The exact cycle is set during the sample trial on your parts.
Related machines & consumables
PMPM-00050
Magnetic Polishing Machine PMPM-00050
PMPM-00050 Metal Magnetic Polishing Machine for metal parts polishing and deburring. Features voltage display meter, forward/reverse magnetic field control, auto-stop timer, inverter speed panel, and fuse protection. Versatile mid-range machine for automotive, electronics, aerospace, medical equipment, and general metal finishing applications.
View specificationsPMPM-18050
Magnetic Polishing Machine PMPM-18050
PMPM-18050 Translational Magnetic Polishing Machine designed as a batch surface treatment equipment for metal parts. Dual-motor configuration (4KW×2) provides high throughput for production environments. Suitable for processing brass, copper, aluminium, 304 stainless steel, titanium alloy, and zinc alloy components across aerospace, medical, electronics, automotive, and precision-hardware industries.
View specificationsPMPB Series
Brightener
Precinova PMPB Series brighteners enhance surface gloss, clean oily residue, and help remove stains and oxide layers during magnetic polishing. PMPB-Cu/Al is for copper and aluminium parts, PMPB-Zn is for zinc and alloy parts, PMPB-SS is formulated for 304 stainless steel, and PMPB-CS/I is for carbon steel and iron parts.
View specifications