UCP 312 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with UCP 312. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.
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Find by measured dimensions
Enter bore d, outside diameter D and width B. Use decimals or inch fractions such as 1/2 or 1 1/4.
UCP 312 dimensions and recorded technical data
Use the named dimensions for each complete record below. A generic d×D×B answer is not asserted where the base record is missing, dimension symbols are unverified, or the product uses a different geometry such as a housing or thrust assembly. Suffix records are not substituted for a missing base specification.
The numeric series boundary is preserved: a longer number is not included merely because its first digits match. 1 recorded variants are listed. A dash means the value is missing, not zero.
Catalogue parameters for UCP 312
Choose the complete brand and marking before reading a value. These source-labelled records add dimensions, construction and engineering properties where they were recorded; a shared model number does not establish interchangeability.
Units, ranges and minimum/maximum qualifiers are retained. The data is a dated catalogue reference, not a certified drawing, a complete current specification or an operating approval.
KOYO UCP312 — 18 recorded parameters
Ball bearing unit
Reference: JTEKT / Koyo catalogue; source snapshot 2026-09-02.
KOYO UCP312 is a bearing-unit reference with a nominal bore d = 60 mm. Its catalogue mounting drawing also lists H = 85 mm, L = 330 mm, A = 85 mm, J = 250 mm, H2 = 167 mm. These housing and mounting measurements must not be compressed into the d×D×B size of a loose bearing.
Use the exact unit drawing when checking the mounting footprint and shaft position. Symbols such as H and L describe the illustrated unit geometry; their direction must not be assumed to be the same on pillow-block and flange-unit constructions.
Calculated inch drawing values: d = 2.362205 in; H = 3.346457 in; L = 12.992126 in; A = 3.346457 in; J = 9.84252 in; N = 0.984252 in; N1 = 1.496063 in; H1 = 1.141732 in; H2 = 6.574803 in; L1 = 4.055118 in; B = 2.795276 in; S = 1.023622 in. These are conversions of the recorded metric dimensions using exactly 25.4 mm/in, rounded to six decimals, not a separate inch-series unit or a fit tolerance.
The unit number and bore do not prove a cross-brand interchange. Check the insert, shaft locking arrangement, bolt or slot dimensions and any lubrication or sealing details in the same record.
This can be a unit or housing record. Bolt spacing, housing envelope, centre height and the insert identity need separate checks; do not interpret every outside dimension as bearing D.
Values shown are retained from the recorded source. Zero boundary dimensions and zero load ratings from incomplete legacy feeds are withheld rather than presented as usable specifications.
Technical Data
| Parameter | Source symbol | Recorded value |
|---|---|---|
| d | Not separately recorded | 60 mm |
| H | Not separately recorded | 85 mm |
| L | Not separately recorded | 330 mm |
| A | Not separately recorded | 85 mm |
| J | Not separately recorded | 250 mm |
| N | Not separately recorded | 25 mm |
| N1 | Not separately recorded | 38 mm |
| H1 | Not separately recorded | 29 mm |
| H2 | Not separately recorded | 167 mm |
| L1 | Not separately recorded | 103 mm |
| B | Not separately recorded | 71 mm |
| S | Not separately recorded | 26 mm |
| Bolt Size | Not separately recorded | M20 |
| Basic Load Ratings : Cr | Not separately recorded | 81.9 kN |
| Basic Load Ratings : C0R | Not separately recorded | 52.2 kN |
| Fatigue Load Limit : Cu | Not separately recorded | 2.37 kN |
| Factor : F0 | Not separately recorded | 13.2 |
| Nipple Size | Not separately recorded | R1/8 |
No recorded variant matches these filters. Clear a filter to see other records; no substitute has been inferred.
| Brand / full designation | Named dimensions (mm / in) | Dynamic C (kN) | Static C0 (kN) | Reference speed (rpm) | Limiting speed (rpm) | Mass (kg / g) |
|---|---|---|---|---|---|---|
| KOYOUCP312Ball bearing unit |
| 81.9 kN | 52.2 kN | — | — | — |
Compare recorded seals, clearance, precision and materials
Manufacturer wording is retained. A missing property is not inferred from another brand or a similar suffix.
| Brand / designation | Closure | Original precision | Clearance | Cage | Material | Lubricant |
|---|---|---|---|---|---|---|
| KOYO UCP312 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
How to compare these values
- Use the displayed dimension names and original symbols. Housing length L, height H2 and flange width are not bearing outside diameter D. A catalogue width with an unverified symbol must not be assumed to be inner-ring width B or assembly width T. Open the product record for mounting dimensions and geometry.
- Inch values are calculated from the recorded millimetres using 25.4 mm per inch, rounded to six decimal places. They do not change a metric bearing into an inch-series bearing. Gram values are converted from the recorded mass in kilograms.
- C and C0 describe different rating conditions. They are not a single safe working-load limit and cannot replace an application load calculation.
- Reference and limiting speeds are separate catalogue values. The source grease/oil context is shown where recorded. Lubricant, seals, loads, fit, clearance and cooling affect the usable operating speed.
- A common base number does not prove equivalent seals, clearance, precision, material or interchangeability. Open the full designation for these fields.
Related prefix matches — other model numbers may appear
These discovery results can contain a longer number or a different component. They are not specifications for the requested exact model. Open the complete product to inspect its original geometry.
Check the drawing before substituting
Nominal dimensions are not shaft-fit tolerances. Different variants can add grooves, flanges, wider rings or assembly components. When the table has different dimensions, the complete designation—not the shared prefix—controls.
Reference basis & data limits
Manufacturer terminology is retained in the product records. Technical reference basis: JTEKT Basic Bearing Knowledge (boundary dimensions, tolerance classes and lubrication); NSK Bearing ABCs (lubrication, designations and clearance); NTN technical FAQs (closure codes and component interchange); SKF rolling-bearing selection and maintenance references.
Selection workflows and catalogue grouping are BearingScope editorial aids. Verify the current drawing and application requirements before using a candidate. Missing database information is not converted into an assumed match.