DodgeWSTU-S2-111S-2000 Wide-Slot Take-Up Bearing Unit — 1-11/16 in Bore, Double-Row Spherical Roller, Setscrew Lock, Non-Expansion (Frame Not Included)

Product Description

What this part is

A Dodge WSTU-S2-111 take-up bearing unit: a steel wide-slot take-up cartridge carrying an S-2000 double-row spherical roller bearing insert with a 1-11/16 in bore. The insert seats on a spherical seat in the cartridge, so it self-aligns to shaft misalignment and frame deflection. The cartridge is designed to slide along the machined ways of a take-up frame so the shaft can be drawn back to tension a belt or chain.

Decoding the designation

WSTU is the Dodge housing style: Wide Slot Take-Up. That is a distinct product from a pillow block or a flange unit — the body has no bolt holes to a frame face; it has a slot that rides on the take-up frame ways and a screw takes up against it. S2 identifies the S-2000 insert. This is the point most often got wrong on these units: Dodge S-2000 inserts are double-row spherical roller bearings, not ball bearings, which is why the load ratings are an order of magnitude above a ball take-up of the same bore. 111 is the bore code, 1-11/16 in. Dodge item numbers for this build are 070756 and 043189. Related Dodge take-up styles are TP and TPHU (top-angle take-ups) and NSTU (narrow slot) — different frames, different slot widths, not interchangeable.

Scope — what is in the box

The take-up cartridge and its S-2000 spherical roller insert, with seals and setscrews, as one unit. The take-up frame is not included. This size runs in the Dodge CP400 centre-pull take-up frame, which is a separate purchase, as is the take-up screw, any guard, and of course the shaft. If you are buying to replace a worn cartridge in an existing frame, measure the frame’s slot width and way spacing before ordering — a cartridge from a different Dodge take-up family will not slide in a CP400 frame.

Published ratings and mounting data

Housing style: wide slot take-up (WSTU) cartridgeShaft size: 1-11/16 in (42.86 mm)Insert: S-2000 double-row spherical rollerLocking method: setscrewsExpansion: non-expansion (fixed) — locates the shaft axiallyDynamic load rating: 20,800 lbf (92.5 kN)Static load rating: 22,000 lbf (97.9 kN)Service temperature range: −20 to 200 °F (−29 to 93 °C)Relubrication: greasableTake-up frame: Dodge CP400 centre pull (sold separately)Approximate cartridge envelope: 5.94 in (150.9 mm) long x 2.83 in (71.9 mm) wide x 4-3/4 in (120.7 mm) highHousing material: steelDodge item numbers: 070756, 043189

What these specs mean in practice

A double-row spherical roller insert takes thrust in both directions as well as heavy radial load, and it tolerates the shaft misalignment that a long conveyor frame always has once it is loaded — that combination is why S-2000 take-ups end up on aggregate, grain, mining and bulk-handling conveyors rather than ball take-ups. At 20,800 lbf dynamic on a 1-11/16 in shaft, the shaft and the frame are usually the limiting elements, not the bearing. Setscrew locking is fine on a clean, unhardened shaft; on a heavily reversing drive an adapter-sleeve or clamp-collar arrangement holds better. Non-expansion means this cartridge locates the shaft axially, so a two-bearing shaft should not use two fixed units at both ends or thermal growth will preload them against each other.

Fitting notes

Clean and lightly oil the take-up frame ways before fitting so the cartridge slides freely; a cartridge that has to be levered along the frame is fighting rust or a bent way, and it will not track square once tensioned. Draw both cartridges on a shaft back by the same amount — unequal take-up cocks the roll and is the usual cause of belt tracking complaints after a bearing change. Tighten the setscrews evenly, then grease through the fitting while the shaft turns slowly until fresh grease shows at the seals. Re-grease more often than on a pillow block: take-ups sit in the dirtiest part of a conveyor.

Interchange guidance

Also written WSTUS2111, WSTU S2 111, WSTU-S2-111R and by the Dodge item numbers 070756 and 043189. Dodge, SealMaster and Link-Belt are all Regal Rexnord brands and Dodge mounted bearings now trade as Dodge Industrial under RBC Bearings, so this part is legitimately searched as Baldor Dodge and Dodge Industrial. Neighbouring bores in the same family are WSTU-S2-115 (1-15/16 in) and WSTU-S2-207 (2-7/16 in) — related sizes with different ratings and different frames, not substitutes. A WSTU-SXR cartridge of the same bore code uses a different insert family and is not the same part.