UC205 ベアリングの寸法とサイズ表

UC205 at a glance

UC205 is one of the most widely used insert bearing sizes. It has a 25 mm bore (1 inch), which makes it a common choice for small to medium conveyor, agricultural and general industrial equipment.

The "UC" prefix means insert bearing, and "205" indicates the bore size group. In mounted bearing units the same insert is referred to as UCP205 (pillow block), UCF205 (square flange), UCFL205 (2-bolt flange) or UCT205 (take-up).

UC205 full dimensions

The table below lists the main UC205 dimensions. Always confirm critical dimensions against the equipment drawing or the old sample before ordering, because small differences in width or locking detail can affect fit.

Bore (d): 25 mm / 1 inch
Outer diameter (D): 52 mm
Inner ring width (B): 34.1 mm
Mass: about 0.22 kg per piece

UC200 series size chart

The UC200 series covers light to medium duty shaft sizes. The chart below shows the standard CTZ range. Dimensions are nominal and should be verified against the product drawing for critical applications.

UC300 series size chart

The UC300 series is the heavier duty counterpart of the UC200 series, with larger outer diameters and higher load capacity for the same bore. Use the chart below as a quick reference.

UC205 in mounted units

The UC205 insert is used inside several mounted bearing units. The bore stays the same, but the housing type changes the mounting method: UCP205 bolts to a base, UCF205 to a flat face, UCFL205 to a narrow side surface, and UCT205 slides for belt tension adjustment.

When replacing a failed unit, confirm whether you need the insert only or the complete mounted bearing unit. Send the model number, quantity and application to the manufacturer for confirmation.

How to confirm the right size

Measure the shaft diameter first. Then check the outer diameter and width if the insert must fit an existing housing. Finally confirm the locking method and seal type with the equipment supplier.

If the old bearing number is unclear, a photo of the existing unit and the installation location helps the manufacturer confirm the correct product quickly.

UC205 main dimensions

Dimension	Value
Bore d	25 mm (1 in)
Outer diameter D	52 mm
Inner ring width B	34.1 mm
Mass	0.22 kg

UC200 series dimensions (CTZ standard range)

Model	d (mm)	D (mm)	B (mm)	Mass (kg)
UC202	15	40	27.4	0.12
UC203	17	40	27.4	0.11
UC205	25	52	34.1	0.22
UC209	45	85	49.2	0.74
UC210	50	90	51.6	0.80
UC211	55	100	55.6	1.10
UC213	65	120	65.1	1.86
UC215	75	130	77.8	2.21
UC217	85	150	85.7	3.38
UC218	90	160	96.0	4.45

UC300 series dimensions (CTZ standard range)

Model	d (mm)	D (mm)	B (mm)	Mass (kg)
UC305	25	62	38.0	0.35
UC308	40	90	52.0	0.96
UC310	50	110	61.0	1.65
UC312	60	130	71.0	2.60
UC315	75	160	82.0	4.33
UC318	90	190	96.0	7.87
UC320	100	215	108.0	11.2
UC328	140	300	145.0	53.0

Before ordering UC205 or another size

Measure shaft diameter with a caliper.
Compare D and B with the existing housing.
Confirm locking method (set screw is common for UC).
Confirm seal type for the working environment.
Share the old model or a photo if unsure.

要点

UC205 has a 25 mm (1 inch) bore, 52 mm outer diameter and 34.1 mm inner ring width.
UC200 is the light/medium duty series; UC300 is the heavier duty series for the same bore.
Confirm bore, outer diameter, width, locking and seal before replacing a bearing.

Frequently Asked Questions

What size is a UC205 bearing?

A UC205 insert bearing has a 25 mm bore (1 inch), 52 mm outer diameter and 34.1 mm inner ring width.

What does UC205 mean?

UC means insert bearing and 205 indicates the bore size group (25 mm). The same insert is used in UCP205, UCF205, UCFL205 and UCT205 mounted units.

Is UC205 the same as UCP205?

No. UC205 is the insert bearing only. UCP205 is the complete pillow block unit that contains a UC205 insert inside a P-housing.

How much does a UC205 bearing weigh?

A UC205 insert weighs about 0.22 kg. The complete UCP205 unit weighs more because of the cast housing.

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