4" x 24" Surface Conditioning Belts (Non-Woven), 6 PACK
4" x 24" Surface Conditioning Belts (Non-Woven), 6 PACK
Available in stock (49999)
The 4" wide portable belt sander is the tool people reach for when the surface is big: truck beds, aluminum boat hulls, stainless counters, steel doors and plate. A non-woven belt on that sander covers the same area a third faster than a 3" belt and leaves a uniform satin instead of a coated-belt scratch. These 4" x 24" surface conditioning belts fit the Makita 9403 and 9404, the Milwaukee 4 x 24 sander, and the Ridgid EB4424 bench oscillating edge sander.
The web is nylon impregnated with aluminum oxide grain on a reinforced scrim backing, and each 6-pack is one grade: Coarse, Medium, Very Fine or Ultra Fine. Use them to strip rust and paint, blend welds, deburr and put a brushed finish on stainless, steel, aluminum and titanium, wet or dry.
- Fits Makita 9403 and 9404, Milwaukee 4 x 24 belt sanders and the Ridgid EB4424 edge sander
- 4" width covers large panels, hulls and plate faster with fewer overlap lines
- Grades from 40–60 to 320–400 grit scratch, six belts of one grade per pack
- Reinforced scrim backing tracks true on high-torque 4" sanders
- Open web runs cool and resists loading on aluminum and painted steel
- Free shipping on orders over $200; bulk pricing on request
Which grade should you choose for a 4-inch sander?
A 4" sander is heavy and powerful, so the belt sees more pressure than on a smaller tool. Start one grade finer than you think and go coarser only if the job demands it.
- Coarse (40–60 grit scratch), brown: stripping rust, mill scale and failed paint from steel plate, truck frames, trailer decks and gates; taking chalky oxidation off aluminum hulls and truck bodies before a finer pass.
- Medium (80–120 grit scratch), maroon: blending welds on plate after grinding, cleaning up a 120 grit coated scratch, and preparing steel and aluminum for primer or powder coat. The grade most shops keep on the 4" sander.
- Very Fine (180–240 grit scratch), blue: directional #4-style satin on stainless counters, hoods, wall panels and large aluminum sheets. The width helps keep the grain lines continuous across a wide panel.
- Ultra Fine (320–400 grit scratch), grey: a fine satin on decorative stainless and aluminum, and the pre-polish grade before buffing.
On the Ridgid EB4424 the same grades apply, but you bring the part to the belt, so it is easier to keep pressure light and work small pieces.
Grade guide for large-area metal finishing
| Grade | Use it for | Notes |
|---|---|---|
| Coarse 40–60 | Rust, scale, paint, heavy oxide | Sander weight only |
| Medium 80–120 | Weld blending, paint prep | Everyday grade |
| Very Fine 180–240 | #4-style satin on wide panels | Long single-direction passes |
| Ultra Fine 320–400 | Fine satin, pre-buff | Lightest touch |
Non-woven refines; it does not remove. Grind welds and deep scratches with a coated zirconia or ceramic belt to 80–120 grit before switching to these.
Which machines take a 4 x 24 belt?
- Makita 9403 and Makita 9404 4" portable belt sanders
- Milwaukee corded 4 x 24 belt sander
- Ridgid EB4424 oscillating edge belt and spindle sander (bench)
- Porter-Cable 362V, as named on our earlier page for this size
On a portable sander: release the tension lever, slide the belt on, re-tension, then run the tool pointed away from you and adjust the tracking knob until the belt is centered on the platen. On the Ridgid EB4424: fit the belt in place of the coated belt with the belt arm tensioned per the manual, then check tracking with the machine running before you touch the part to it. Non-woven belts have no direction arrow and run either way. They are thicker than cloth belts, so if tracking wanders, make small adjustments and let the belt settle between them.
How to get the most out of them
- Grind first. Take welds flush and deep scratches out with a coated belt. A Medium non-woven belt after a 120 grit coated belt, or Very Fine after 180–220, is the sequence that gives a clean, even finish.
- Use only the sander's weight. A 4" sander already weighs more than a 3" model. Any added downforce crushes the web, heats the part and tears fibers off the scrim, and it is why a non-woven belt wears out early.
- Start off the work, land flat, keep moving. Bring the sander to speed, set it down flat on the panel and move immediately. Overlap passes by about a third of the belt width for an even finish.
- On stainless, run every pass the same direction. Start off one edge, travel the full length and lift off the far edge. That is what makes a #4-style satin look continuous across a counter or wall panel.
- Slow the belt if you can, and lubricate aluminum. A variable-speed sander should run in its low range for non-woven. On aluminum and titanium a mist of water or light cutting fluid keeps metal from smearing into the web; the belt is waterproof.
- Manage dust and store correctly. Metal swarf and paint dust do not belong in a wood-dust bag or collector. Blow belts out with air, hang wet belts to dry, and keep spares out of sunlight.
Use it for / don't use it for
Use it for
- Stripping rust, scale and old paint from steel plate, doors, frames and trailer decks
- Removing oxidation and brushing aluminum boat hulls, truck bodies and sheet
- Satin and #4-style finishes on stainless counters, hoods and wall panels
- Blending welds and grinder marks on plate after coated-belt grinding
- Deburring and finishing small parts on the Ridgid EB4424
- Prepping steel and aluminum for primer, paint or powder coat; scuffing fiberglass
Don't use it for
- Removing weld metal or stock; use a coated zirconia or ceramic belt
- 3 x 24 or 4 x 36 machines; the belt is the wrong size
- Leaning into the sander; pressure destroys the web
- Producing a mirror; follow Ultra Fine with buffing wheels and compound
Specifications
| Size | 4" x 24" |
|---|---|
| Abrasive | Aluminum oxide in a non-woven nylon web |
| Backing | Reinforced scrim, stretch-resistant |
| Grades offered | Coarse (40-60), Medium (80-120), Very Fine (180-240), Ultra Fine (320-400) |
| Color code | Brown / maroon / blue / grey |
| Joint | Bi-directional, no arrow |
| Pack quantity | 6 belts, one grade per pack |
| Wet or dry | Both |
| Fits | Makita 9403/9404, Milwaukee 4 x 24, Ridgid EB4424 and other 4 x 24 sanders |
| Converted in | Anaheim, California |
| Custom sizes | Made to order in about 3 days |
Frequently asked questions
Do these 4 x 24 surface conditioning belts fit the Ridgid EB4424?
Yes. The Ridgid EB4424 oscillating edge belt and spindle sander uses a 4" x 24" belt, and these non-woven belts fit it in place of the coated belt. Tension and track it per the manual with the machine running before you bring a part to it. Because you feed the part by hand, it is easy to keep pressure light, which is what non-woven wants.
Which grade strips rust and old paint from steel plate fastest?
Coarse (brown, 40–60 grit scratch) is the fastest non-woven grade for rust, mill scale and failed paint on a 4 x 24 sander, and it does the job without cutting grooves into the plate the way a coarse coated belt can. Let the sander's weight do the work and keep it moving. Follow with Medium if you want a finer profile under primer.
Can I use these belts on an aluminum boat hull?
Yes. A 4" x 24" non-woven belt is well suited to aluminum hulls and truck bodies because the open web sheds aluminum instead of loading, and it runs cool. Use Coarse or Medium to remove chalky oxidation, Very Fine for a brushed finish, keep pressure light and mist the surface with water or a light lubricant; the belt is waterproof.
Is a 4 x 24 belt interchangeable with a 4 x 36 belt?
No. Both are 4" wide, but the 4 x 36 is a foot longer and fits bench belt/disc combination sanders, while the 4 x 24 fits portable sanders such as the Makita 9403 and 9404 and the Ridgid EB4424. Check the belt size printed on your machine before ordering, and if you need another length we make custom sizes in about 3 days.
Why six belts in a pack?
A 4" sander is usually bought for large jobs, and a large job uses several belts of the same grade. Six of one grade covers a hull, a set of doors or a run of stainless panels without stopping to reorder. If you use more than that, bulk and case pricing is available by calling 714-646-3299 or emailing sales@maverickabrasives.com.
Will a non-woven belt track properly on a heavy 4-inch sander?
Yes. The reinforced scrim backing keeps the 4 x 24 belt from stretching under the tension and torque of a large sander, so it tracks like a cloth belt once set. The web is thicker than cloth, so make small tracking adjustments with the sander running off the work and give the belt a few seconds to settle before adjusting again.
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