43" x 85" Sanding Belt, 2 PACK
43" x 85" Sanding Belt, 2 PACK
Available in stock (49998)
Production cabinet shops and millwork plants running a 43-inch wide belt sander burn through belts by the case, and the cost of a bad belt is a ruined panel, not just a wasted belt. These closed-coat aluminum oxide belts on poly-cotton cloth are converted to 43" x 85" for Timesaver-class 43-inch machines and sold two to a pack in a single grit.
The range covers 36 grit for calibrating rough glue-ups through 320 for a skim pass on veneer, so one listing supplies every head on a single- or two-head machine. Aluminum oxide is the grain for hardwood, plywood and MDF: it cuts predictably at production feed rates and leaves a scratch pattern that stains evenly. We convert these belts in Anaheim, California.
- Closed-coat aluminum oxide on poly-cotton cloth, made for 43-inch industrial wide belt sanders
- Nine grits, 36 through 320: calibrating, dimensioning, surfacing and finishing from one listing
- 2-pack per grit keeps a spare loaded belt ready at each head
- Cloth backing holds tension and tracks on older Timesaver-class machines
- Runs hardwood, softwood, plywood, MDF, aluminum and composites dry
- Converted in Anaheim, California; case pricing on request; free shipping over $200
Which grit belongs on each head of a 43-inch wide belt sander?
All belts on this page are A/O - Aluminum Oxide, closed coat. The old page also described zirconia; it is not stocked in 43" x 85" but can be converted to order for shops that calibrate hardwood at 36 grit all day or run steel plate. For most panel work aluminum oxide is the right grain at every head.
- 36 grit: first-head calibrating of rough or glued-up stock on the contact drum. Removes cup, twist and glue ridges fast.
- 60 grit: second-head dimensioning, or the first head when panels come in planed and flat.
- 80 and 100 grit: general surfacing. 80 is the standard first belt for face frames and doors that arrive planed; 100 is a useful intermediate on a three-head line.
- 120 and 150 grit: pre-finish. 120 is where paint-grade MDF and primer-ready plywood stop.
- 180 and 220 grit: last head before stain or clear on solid hardwood. Run these on a platen head where the machine has one. Do not go finer than 220 under stain.
- 320 grit: a skim pass on veneered panels, figured wood and clear-coat or oil work only, and a fine finishing belt for aluminum sheet.
A common two-head setup on this size is 80 on the drum and 150 on the platen; a three-head line often runs 60, 120 and 180.
Grit guide for calibrating and finishing panels
| Grit | Use it for | Notes |
|---|---|---|
| 36 | Calibrating glue-ups, rough stock | Contact drum; up to 1/32 in per pass |
| 60 | Dimensioning, glue lines | Do not jump from 60 to 150 |
| 80–100 | Surfacing planed stock | Most-used head on cabinet work |
| 120–150 | Pre-finish, paint-grade | Less than 1/64 in per pass |
| 180–220 | Final before stain or clear | Platen head; stop at 220 for stain |
| 320 | Veneer skim, clear or oil finish | No stock removal, no dwell |
What machines take a 43" x 85" belt?
- 43-inch industrial wide belt sanders of the Timesaver 43 class, single- and multi-head, whose manual calls for an 85-inch belt. "Timesaver" is used in the trade for wide belt sanders generally as well as for the brand, and the old page used it that way.
- Other 43-inch machines that specify a 75-inch or 103-inch belt take our 43" x 75" or 43" x 103" belts instead; length tolerance is only about plus or minus 1/4 inch, so match the manual.
Mounting on a machine this size: retract the tension roller, slide the belt on with the abrasive out, tension, then set tracking with the oscillation running so the belt swings evenly either side of centre and the photo-eye or limit switches are not tripped. Check the inside of the belt for a direction arrow before mounting; if one is printed, run the belt that way so the joint trails. For a width or length not shown on the site, we convert custom sizes in about 3 days.
How to get the most out of it
- Match the head to the grit. Calibrating grits (36 to 60) belong on the contact drum; finishing grits (150 and up) belong on the platen, which floats the belt over the surface and removes the drum's slight scallop.
- Keep passes light and feed fast. 1/64 to 1/32 inch per pass at 36 to 60 grit on hardwood, and less as the grit gets finer. Slow feed burns; deep passes overload the belt and the motor.
- Never skip more than one grit between heads. 36, 60, 80, 120, 180, 220. A 60-to-150 jump leaves 60-grit scratches under a surface that looks finished until stain hits it.
- Dust extraction is belt life. Loading is the number one killer of wide belts. Check the collector gates and hoses on the sander before you blame the belt.
- Clean belts on the machine. A crepe-rubber belt eraser pressed lightly against the running belt pulls resin and dust out of the grain and can double the useful life of a finishing belt.
- Spread the wear. Feed panels across different parts of the 43-inch width rather than always down the centre.
- Store spares hanging on a rack, away from humidity and sunlight, and let a cold belt come to shop temperature before mounting. Belts left on the floor take a set and thump.
Two guides from our blog cover the problems we hear about most on 43-inch machines: why wide sanding belts break and chatter marks and finish problems on wood.
Use it for / don't use it for
Use it for
- Calibrating and finishing cabinet doors, face frames, drawer fronts and panels up to 43 inches wide
- Glued-up tabletops, countertops and stair treads
- Paint-grade MDF and plywood surfacing
- Veneered panels at 150 grit and finer on the platen
- Aluminum sheet and composite panels, dry
Don't use it for
- Steel plate and weld removal as a daily job; that calls for zirconia, which we can convert to order
- Wet sanding; these are dry-use belts
- Running a belt with a lifted joint, a crease or a torn edge
- Finishing finer than 220 on wood that will be stained
- Machines that specify a 75- or 103-inch belt
Specifications
| Size | 43" wide x 85" long |
|---|---|
| Abrasive grain | A/O - Aluminum Oxide |
| Backing | Poly-cotton cloth |
| Coat | Closed coat |
| Joint | Check inside of belt for a direction arrow before mounting |
| Grits offered | 36, 60, 80, 100, 120, 150, 180, 220, 320 |
| Pack quantity | 2 belts, one grit per pack |
| Wet or dry | Dry |
| Machine type | 43-inch industrial wide belt sanders (Timesaver class) |
| Converted in | Anaheim, California |
| Custom sizes | Made to order in about 3 days |
Frequently asked questions
How do I know whether my 43-inch sander takes an 85-inch belt?
Check the belt size plate on the machine or the manual; it is usually stated as width by length. If you only have an old belt, lay it flat, mark a point, and roll it once along a tape. A 43" x 85" belt measures 85 inches around. Most machines tolerate about a quarter inch either way; if yours needs 75 or 103 inches, we stock those too.
Is zirconia available for this size?
Not as a stocked item; this page is closed-coat aluminum oxide only. Zirconia earns its cost when you calibrate hardwood at 36 to 60 grit continuously or run steel on the machine. For those jobs call 714-646-3299 or email sales@maverickabrasives.com and we will quote a custom 43" x 85" zirconia run.
Which grit goes on the drum and which on the platen?
Coarse grits from 36 to 80 run on the contact drum, which removes stock. Finishing grits from 150 to 320 run on the platen, which floats the belt over the panel and removes the slight scallop the drum leaves. 100 and 120 can run on either, depending on whether that head is doing removal or finishing.
Why is my 43-inch belt breaking at the joint?
The common causes are running the belt against its direction arrow, tracking set so the belt rides against the limit, a belt stored folded so the joint took a crease, or a worn tension roller edge. Our guide to broken wide sanding belts, linked above, walks through each cause and the fix.
Can I go finer than 220 before stain on a wide belt sander?
We advise against it. Above 220 a wide belt burnishes the wood surface, closing the pores so the stain sits on top and comes out blotchy and light. Stop at 180 or 220 for stained work and reserve 320 for veneer, clear coat and oil finishes where burnishing does not matter.
How many belts are in the pack and do you offer case pricing?
Each pack contains two 43" x 85" belts of the same grit. Production shops usually order several packs per grit, and we quote case and bulk pricing by phone or email. Orders over $200 ship free, and unused belts in original packaging can be returned within 30 days.
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