Plummer blocks
Plummer blocks are made up of a bearing insert and a bearing housing made of gray cast iron or cast steel, thus forming easy-to-maintain and ready-to-mount units. The spherical design of the bearing insert allows them to adjust to any tilting of the shaft. Plummer block are particularly well-suited for high radial loads and are very robust against external resistance thanks to their gray cast iron form. Horizontal installation allows maximum load capacity to be achieved. In the case of vertical or suspended placement, you need to take into account reductions in the maximum load.
Standard housing product range
| ABEG designation | Design | available in ABEG® performance classes | ||
|---|---|---|---|---|
| UCP-2... | UCP-201 to UCP-220 shaft diameter 12 mm to 100 mm |  |  |  |
| UCP-3... | UCP-305 to UCP-328 (heavy-duty design) shaft diameter 25 mm to 140 mm | | | |
| S-UCP-2... SM-UCP-2... | cap housing bearings S = caps open on both sides SM = one side open, the other closed | | | |
| UCPW | compact plummer block with tapped hole | | | |
| UP-0 | plummer block with housing made of die-cast aluminum Clean Series from 8 mm shaft diameter | | | |
| UCPH-2... | UCPH-201 to UCPH-211 (tall design) | | | |
Plummer block made of other materials
In addition to housings made of gray cast iron, there are also other optimized materials for special applications
↵ ↵
| ABEG designation | Design | available in ABEG® performance classes | ||
|---|---|---|---|---|
| UCP-2...-SS | UCP-201 to UCP-212 made of stainless steel | | | |
| UCPW-2...-SS | UCPW-201 to UCPW-208 made of stainless steel | | | |
UCP-2...-Y1 UCP-2...-Y2 UCP-2...-Y3 UCP-2...-Y7 | P plummer block made of stainless steel bearing insert with ceramic balls like Y1, but bearing insert made of stainless steel like Y2, but cage made of solid lubricant bearing insert made of special stainless steel, cage made of fluorine resin | | ||
| UP-0... | plummer block with housing made of die-cast aluminum Clean Series from 8 mm shaft diameter | | | |
| UCVP-2...-SS | P plummer block housing made of engineering plastic UC bearing insert made of stainless steel | | | |
| UCVPW-2...-SS | PW plummer block housing made of engineering plastic UC bearing insert made of stainless steel | | ||
| UBPP-2... | P plummer block made of steel sheet UB (alt. EN, CS) bearing insert | | | |
- Bearing clearance classes C2, CN, C3 and C4
- | Fa - axial load
- | Noise test by decibels
- | Noise test by vibration level for deep groove ball bearings
- | Noise test by vibration level for tapered roller bearings
- | P - dynamic equivalent load
- | PN/P0 tolerance class for radial bearings (without tapered roller bearings)
Product range of bearings inserts according to JIS 
| ABEG designation | Design | available in ABEG® performance classes | ||
|---|---|---|---|---|
| EN | S-type bearing with eccentric, inner ring elongated on one side | | | |
| EW | S-type bearing with eccentric, inner ring elongated on both sides | | | |
| UB | Bearing insert with grub screw, elongated on one side | | | |
| UC | Bearing insert with grub screw, inner ring elongated on both sides | | | |
| UK | Bearing insert with conical inner ring (installation with adapter sleeve) | | | |
| NC | Bearing insert with slotted inner ring and clamp ring with cylinder head bolt | | ||
| ZK | Bearing insert Z-LOCK special lock, similar to UK with integrated adapter sleeve (patented) | | ||
| CS-...-2RS | Bearing insert Installation on shaft tolerance | | | |
Find out more here: Bearing inserts for housing bearings, including conversion tables
Technical information
Housings are made of gray cast iron according to EN-GIL-200/250 as standard. If higher strength properties are required, housings according to EN-GJS-400/450/500 are available.
Stainless steel housings are made of AISI304 or AISI316 and are therefore also highly resistant to salt water.
Plastic housing bearings are made of a technical polymer, which can also have anti-bacterial properties, depending on the requirements.
Housings made of steel sheet are supplied in a galvanized finish as standard. On request, we also offer them with a bright finish for customized coating/painting.
Please learn about the materials in the bearing inserts in the corresponding product group.
Additional information
| Suffix | Description |
|---|---|
| D1 | pre-greased with lithium soap grease, can be relubricated |
| D2 | like D1, but with three lubrication holes in the outer ring of the bearing insert for compatibility with European designs |
| M1 | like D1, but the bearing insert is treated with a black oxide coating for corrosion protection |
| L3 | bearing insert with three-lip seal |
| E | NEW: “semi-solid” base design for higher loads despite a decrease in weight |
| K2 | high-temperature design, seal containing silicone |
| K3 | non-contact seals for high speeds (fans) |
| S3 | 100% noise-tested, for example for fans, with anti-twist protection |
| S5 | combination of K3 + S3 + increased accuracy for bearing clearance, and tighter tolerances |
| Y1 | standard roller bearing steal with ceramic balls |
| Y2 | made of stainless steel with ceramic balls |
| Y3 | made of stainless steel with ceramic balls and solid lubricant |
| Y7 | bearing insert made of special stainless steel, cage made of fluorine resin |
Typical assembly and handling mistakes
- Lack of expertise
- Lack of qualified personnel
- Tightening torque of the fastening screws exceeded → cast housing may break out → proper assembly no longer possible
Additional information
| Content | Page |
|---|---|
| Housing strength according to load direction | P. 48 |
| Assembly and installation | P. 71 |
You can find more information in our FYH Housing Catalog
Housing bearings with outstanding sealing technology
FloBack and flinger ring
UC series bearing inserts come with effective sealing as standard. The flinger ring rotates with the inner ring and immediately slings away coarse dirt upon impact. The FloBack seal located behind the flinger ring protects the bearing interior against fine dirt.
Our premium manufacturer FYH meets the increasing demands for functioning protection against contamination with various seal designs that are incorporated into the bearing and can be supplemented by additional accessories. Steel sheet caps are clipped into a groove in the housing (E design = with groove). The interior can be filled with grease to improve the sealing effect even further and to bind dirt. Cast caps can be screwed onto the corresponding housing to protect against very coarse dirt (F design). FYH offers backside guards to ensure that flange bearings are better protected from the rear.
The images are taken from FYH’s main catalog.
