Insert Bearings & Housed Units · JIS B 1558 / ISO 9628
Machined Brass Cage UC300 Series Insert Bearings
Temperature and speed limits, lubricant compatibility, and the bore range this cage is offered across.
Machined Brass Cage UC300 Series Insert Bearings 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.
Machined Brass Cage UC300 Series Insert Bearings: Specified for large bearings, high speed, heavy shock and vibration, and wherever temperature or lubricant rules out polyamide. The material decides the corrosion behavior — good in most industrial environments; brass is attacked by ammonia, so it is not used in ammonia refrigeration plant and the temperature the part will stand (the cage itself is good well past the temperature at which the lubricant and the ring stabilization give out), and it is the reason the alternatives below exist. Properties, limits and the full size table follow.
Why Machined Brass Cage for UC300 Series Insert Bearings
Specified for large bearings, high speed, heavy shock and vibration, and wherever temperature or lubricant rules out polyamide. In a uc300 series insert bearings 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 UC300 Series Insert Bearings Available in Machined Brass Cage
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
UC305
25
62
38.1
UC306
30
72
42.9
UC307
35
80
48.4
UC308
40
90
52.4
UC309
45
100
55.6
UC310
50
110
65.1
UC311
55
120
65.1
UC312
60
130
77.8
UC313
65
140
77.8
UC314
70
150
82.6
UC315
75
160
82.6
Other ways to specify the UC300 Series Insert Bearings
The alternatives worth weighing against it are Cast Iron, Pressed Steel Cage and Polyamide Cage, each written to the same headings so the comparison is a like-for-like one.
The same bearing can also be sized from the shaft on the 40 mm bore and 45 mm bore pages.
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 (JIS B 1558 / ISO 9628)
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
UC305
25
62
38.1
UC306
30
72
42.9
UC307
35
80
48.4
UC308
40
90
52.4
UC309
45
100
55.6
UC310
50
110
65.1
UC311
55
120
65.1
UC312
60
130
77.8
UC313
65
140
77.8
UC314
70
150
82.6
UC315
75
160
82.6
Video: Machined Brass Cage UC300 Series Insert Bearings
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
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.
Are Machined Brass Cage UC300 Series Insert Bearings magnetic?
Machined Brass Cage is non-magnetic.
What temperature can Machined Brass Cage UC300 Series Insert Bearings run at?
The usable range for the material is the cage itself is good well past the temperature at which the lubricant and the ring stabilization give out. In an assembled bearing the lubricant, the seals and the cage frequently give out before the material does, so check all four against the duty.
What corrosion resistance does Machined Brass Cage give?
Corrosion behavior: good in most industrial environments; brass is attacked by ammonia, so it is not used in ammonia refrigeration plant.
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.
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