Hub CityWSTU220X1-7/16Wide Slot Take-Up Bearing Unit – 1-7/16 in Bore, 3-1/2 in Between Frames, 17/32 in Slot, Setscrew Locking

Product Description

What this part is

Hub City WSTU220X1-7/16 wide slot take-up bearing unit. Manufacturer: Hub City. Part Number: WSTU220X1-7/16. Series: WSTU220, Wide Slot Take-Up Unit. Bore / Shaft Size: 1-7/16 in (1.4375 in, 36.51 mm). Housing Style: wide slot take-up frame unit, cast housing. Between Frames: 3-1/2 in. Slot Width: 17/32 in. Locking Method: setscrew. Rolling Elements: steel balls. Number Of Rows: 1. Lubricant: grease. Relubrication: relubricatable. Duty Type: standard duty. Operating Temperature Range: -20 to 225 °F. Weight: 6.50 lb. Design Units: Inch. Country of Origin: Mexico.

Decoding the designation

WSTU is Hub City’s Wide Slot Take-Up Unit line. The 220 is the series code and fixes the frame geometry: Between Frames 3-1/2 in and Slot Width 17/32 in. The X 1-7/16 is the bore. Bore / Shaft Size: 1-7/16 in.

Housing style and frame fit

Housing Style: wide slot take-up. The unit slides along a take-up frame channel rather than bolting to a fixed face, so shaft position is adjustable along the frame and belt or chain tension is set by moving the unit. Between Frames: 3-1/2 in — the dimension across the outside of the housing ears that has to match the inside width of the take-up frame. Slot Width: 17/32 in — the width of the guide slot in the housing, which pairs with the frame rail thickness. Those two figures together decide whether the unit drops into an existing frame, and they are series properties, so they hold across the WSTU220 bore range. Locking Method: setscrew — the insert locks to the shaft through setscrews in the extended inner ring.

What these specs mean in practice

A take-up unit is the tensioning end of a conveyor or drive: the head or drive shaft sits in fixed pillow blocks and the tail shaft sits in take-up units, so belt stretch is taken up by advancing the take-up screw rather than by re-cutting the belt. The insert self-aligns in the housing seat, so the shaft can sit at a small angle to the frame without loading the bearing edge. Lubricant: grease, and Relubrication: relubricatable through the housing fitting, which is what allows a take-up unit at the dirty end of a conveyor to be re-greased on a service round instead of replaced. Operating Temperature Range: -20 to 225 °F. Duty Type: standard duty. Weight: 6.50 lb.

Quantity and configuration

Unit Quantity: 1 Pc. One complete take-up unit: housing and insert bearing with its setscrews.

Interchange guidance

The Dodge equivalent is WSTU-SC-107, where SC is the setscrew insert and 107 is the 1-7/16 in bore code. The SKF equivalent is TU 1.7/16 TF. A take-up unit interchanges when three things match: the bore, the between-frames dimension and the slot width, because the frame is what constrains the housing. Searchable variants of the number: WSTU220X1-7/16, WSTU220 X 1-7/16, WSTU-220-X-1-7/16, WSTU 220 X 1 7/16, WSTU220-1 7/16, WSTU220X1.4375.