Insert Bearings & Housed Units · ISO 3228 / JIS B 1559
Machined Brass Cage UCP200 Series Pillow Block Units
Temperature and speed limits, lubricant compatibility, and the bore range this cage is offered across.
Machined Brass Cage UCP200 Series Pillow Block Units are made from machined cast or wrought brass, rolling-element or ring guided (suffix M, MA, MB or MP by maker). Corrosion behavior: good in most industrial environments; brass is attacked by ammonia, so it is not used in ammonia refrigeration plant. The material is non-magnetic, and the usable service range is the cage itself is good well past the temperature at which the lubricant and the ring stabilization give out. In practice this material is specified for large bearings, high speed, heavy shock and vibration, and wherever temperature or lubricant rules out polyamide.
Material
machined cast or wrought brass, rolling-element or ring guided (suffix M, MA, MB or MP by maker)
Corrosion resistance
Good in most industrial environments; brass is attacked by ammonia, so it is not used in ammonia refrigeration plant
Magnetic response
Non-magnetic
Service temperature
the cage itself is good well past the temperature at which the lubricant and the ring stabilization give out
Property figures are typical for the material. In an assembled bearing the lubricant, the seals and the cage frequently reach their limits before the material does, so check all four against the duty. Material certification is available on request for production orders.
In a ucp200 series pillow block units, Machined Brass Cage is the cage, which spaces the rolling elements and keeps them from touching each other. The grade is machined cast or wrought brass, rolling-element or ring guided (suffix M, MA, MB or MP by maker); it is non-magnetic, and its usable service range is the cage itself is good well past the temperature at which the lubricant and the ring stabilization give out. This page covers what the material changes about the bearing, the limits it brings with it, and the sizes supplied.
Why Machined Brass Cage for UCP200 Series Pillow Block Units
Specified for large bearings, high speed, heavy shock and vibration, and wherever temperature or lubricant rules out polyamide. In a ucp200 series pillow block units it is the cage, which spaces the rolling elements and keeps them from touching each other.
A machined brass cage is strong, stable at temperature, and unaffected by the oils and additives that age a polymer cage. It is what large bearings, high-speed bearings and heavily shocked bearings are supplied with.
Material Properties
Grade designation
machined cast or wrought brass, rolling-element or ring guided (suffix M, MA, MB or MP by maker)
Magnetic response
Non-magnetic
Service temperature
The cage itself is good well past the temperature at which the lubricant and the ring stabilization give out
Corrosion characteristic
Good in most industrial environments; brass is attacked by ammonia, so it is not used in ammonia refrigeration plant
Service Limits
Brass is attacked by ammonia, so a brass-caged bearing has no place in an ammonia refrigeration plant. The machined cage also weighs more than a pressed or moulded one, which matters for acceleration and for the cage forces at very high speed.
Alternatives and When to Switch
Polyamide is lighter, quieter and cheaper for ordinary speeds and temperatures; pressed steel is the volume standard. Brass earns its cost where the cage forces or the temperature are genuinely beyond both.
Sizes of UCP200 Series Pillow Block Units Available in Machined Brass Cage
Designation
Shaft bore d (mm)
Height to shaft centre H (mm)
Bolt hole centres J (mm)
Overall length L (mm)
Housing material
UCP201
12
30.2
95
127
Grey cast iron
UCP202
15
30.2
95
127
Grey cast iron
UCP203
17
30.2
95
127
Grey cast iron
UCP204
20
33.3
95
127
Grey cast iron
UCP205
25
36.5
105
140
Grey cast iron
UCP206
30
42.9
121
165
Grey cast iron
UCP207
35
47.6
127
167
Grey cast iron
UCP208
40
49.2
137
184
Grey cast iron
UCP209
45
54
146
190
Grey cast iron
UCP210
50
57.2
159
206
Grey cast iron
UCP211
55
63.5
171
219
Grey cast iron
UCP212
60
69.9
184
236
Grey cast iron
UCP213
65
76.2
197
254
Grey cast iron
UCP214
70
79.4
210
266
Grey cast iron
UCP215
75
82.6
217
275
Grey cast iron
UCP216
80
88.9
232
292
Grey cast iron
UCP217
85
95.3
248
310
Grey cast iron
UCP218
90
101.6
260
328
Grey cast iron
Other ways to specify the UCP200 Series Pillow Block Units
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the designation snaps the other fields to that size's standard values; you can then override any individual value.
Sends the selected values to the quote form below.
Our facility
Where these dimensions are actually made
Ring forging, heat treatment, raceway grinding and superfinishing all happen under one roof, so a bore tolerance and a clearance group are set by processes we control and can evidence, not by whichever supplier had stock.
Request a Quote
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (ISO 3228 / JIS B 1559)
Designation
Shaft bore d (mm)
Height to shaft centre H (mm)
Bolt hole centres J (mm)
Overall length L (mm)
Housing material
UCP201
12
30.2
95
127
Grey cast iron
UCP202
15
30.2
95
127
Grey cast iron
UCP203
17
30.2
95
127
Grey cast iron
UCP204
20
33.3
95
127
Grey cast iron
UCP205
25
36.5
105
140
Grey cast iron
UCP206
30
42.9
121
165
Grey cast iron
UCP207
35
47.6
127
167
Grey cast iron
UCP208
40
49.2
137
184
Grey cast iron
UCP209
45
54
146
190
Grey cast iron
UCP210
50
57.2
159
206
Grey cast iron
UCP211
55
63.5
171
219
Grey cast iron
UCP212
60
69.9
184
236
Grey cast iron
UCP213
65
76.2
197
254
Grey cast iron
UCP214
70
79.4
210
266
Grey cast iron
UCP215
75
82.6
217
275
Grey cast iron
UCP216
80
88.9
232
292
Grey cast iron
UCP217
85
95.3
248
310
Grey cast iron
UCP218
90
101.6
260
328
Grey cast iron
Video: Machined Brass Cage UCP200 Series Pillow Block Units
Third-party video, selected automatically for this topic. It is not produced by Bushing Bearings and is not a specification source — use the tables on this page for dimensional data.
Frequently Asked Questions
What should I use instead of Machined Brass Cage?
Polyamide is lighter, quieter and cheaper for ordinary speeds and temperatures; pressed steel is the volume standard. Brass earns its cost where the cage forces or the temperature are genuinely beyond both.
Does Machined Brass Cage change the dimensions or the rating?
The cage carries no load, so it changes no rating. What it changes is the operating envelope: the maximum temperature, the maximum speed, the tolerance of shock and vibration, the noise, and the compatibility with the lubricant. A bearing is very often limited by its cage long before its rings are in any danger, which is why the cage suffix in a designation is not a detail.
Does the cage affect the load rating?
No. The cage carries no load — it spaces the rolling elements and guides them. What it decides is the operating envelope: the temperature limit, the speed limit, the tolerance of shock and vibration, the noise, and the compatibility with the lubricant.
How do I know which cage a bearing has?
From the suffix in the designation. The conventions differ between makers, but a bearing without a cage suffix normally has the standard pressed steel cage, and the polyamide and machined brass alternatives are always marked. Where the cage matters to the duty, state it on the order rather than assuming.
How do I request a quotation?
Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.
Need a bearing quote or a spec sheet?Message our engineers on WhatsApp — send a drawing or DIN number and get pricing back fast.Start WhatsApp Chat →
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