UCPA204 Pillow Block Housing Unit
20 mm Tapped Base Pillow Block Unit
UCPA204 is a 20 mm pillow block unit with a tapped base. It uses a UC204 insert bearing and a cast iron PA204 housing. The shaft is fixed by set screws, while the housing is mounted from the bottom through the tapped holes.
For replacement orders, the mounting dimensions are just as important as the bearing bore. Check the shaft size, hole spacing and center height before selecting the unit.
UCPA204 Key Specifications
| Item | Specification |
|---|---|
| Model | UCPA204 |
| Bearing Insert | UC204 |
| Housing | PA204 |
| Shaft Bore | 20 mm |
| Housing Material | Cast Iron |
| Locking Method | Set Screw |
| Mounting Type | Tapped Base |
| Mounting Thread | M10 |
| Hole Center Distance | 52 mm |
| Center Height | 30.2 mm |
| Housing Length | 76 mm |
| Housing Width | 40 mm |
| Overall Height | 62 mm |
| Insert Width | 31 mm |
| Approx. Weight | 0.56–0.60 kg |
Why the Tapped Base Matters
UCPA204 is different from the more common UCP204 style.
The mounting holes are tapped into the base, so the fixing bolts are installed from below. This can be useful when there is limited space around the mounting plate or when through-bolts are not convenient.
The short base also makes the unit different from a standard long-base pillow block. For replacement work, hole position and center height should be checked before ordering, not only the 20 mm bore.
What Should Be Confirmed Before Ordering?
For a replacement UCPA204, we normally recommend checking these points:
20 mm shaft diameter
52 mm mounting-hole center distance
30.2 mm shaft center height
M10 mounting thread
UC204 insert bearing
Cast iron PA204 housing
A photo of the existing unit plus the main dimensions is also useful when the original brand or part number is unknown.
FAQ
Is UCPA204 the same as UCP204?
No. Both use a 20 mm UC204-type insert, but the housing and mounting arrangement are different. UCPA204 uses a tapped base.
What does "UCPA" mean?
UCPA refers to a pillow block design with a tapped mounting base. The exact housing dimensions depend on the series and manufacturer.
Can I replace a UCPA204 with another brand?
Usually, if the key mounting and bearing dimensions match. For OEM replacement, compare the drawing rather than relying on the model number alone.
Can the UC204 insert be replaced separately?
Yes. The UCPA204 assembly uses a UC204 insert bearing, so the insert and housing can be treated as separate parts for maintenance or replacement.
Do you supply UCPA204 for OEM orders?
Yes. Standard UCPA204 units can be supplied for replacement and bulk orders. Drawing or sample matching can also be discussed for OEM requirements.
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