HK1212 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with HK1212. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.
On this page5 sections ⌄
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.
HK1212 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. 6 recorded variants are listed. A dash means the value is missing, not zero.
Catalogue parameters for HK1212
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 HK1212 — 11 recorded parameters
Needle roller bearing
Reference: JTEKT / Koyo catalogue; source snapshot 2026-09-02.
Under-roller diameter Fw, shaft raceway dimensions and an inner-ring bore are not interchangeable labels. Check whether an inner ring is included in the exact construction.
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 |
|---|---|---|
| Fw | Not separately recorded | 12 mm |
| D | Not separately recorded | 18 mm |
| C | Not separately recorded | 12 mm |
| R(Min.) | Not separately recorded | 1 mm |
| Basic Load Ratings : Cr | Not separately recorded | 6.61 kN |
| Basic Load Ratings : C0R | Not separately recorded | 7.29 kN |
| Fatigue Load Limit : Cu | Not separately recorded | 1.10 kN |
| Limiting Speeds(Grease Lub.) | Not separately recorded | 14000 min-1 |
| Limiting Speeds(Oil Lub.) | Not separately recorded | 22000 min-1 |
| Mounting Inner Ring | Not separately recorded | JR8x12x12,5 |
| Mass(Refer.) | Not separately recorded | 0.01 kg |
SKF HK 1212 — 29 recorded parameters
Drawn cup needle roller bearing with open ends
Reference: SKF product catalogue; source snapshot 2026-09-02.
This designation identifies a tapered-bearing component. A cone or cup alone is not the assembled bearing; use the documented pairing and total assembly width before comparing an interchange.
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.
Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter of needle roller complement | Not separately recorded | 12.0 mm |
| Outside diameter | Not separately recorded | 18.0 mm |
| Width | Not separately recorded | 12.0 mm |
Performance
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Basic dynamic load rating | Not separately recorded | 6.27 kN |
| Basic static load rating | Not separately recorded | 7.35 kN |
| Reference speed | Not separately recorded | 16000.0 r/min |
| Limiting speed | Not separately recorded | 18000.0 r/min |
Properties
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bearing part | Not separately recorded | Bearing without inner ring |
| Number of rows | Not separately recorded | 1 |
| Outer ring type | Not separately recorded | Drawn cup with open ends |
| Aligning feature | Not separately recorded | Without |
| Cage | Not separately recorded | Sheet steel |
| Number of flanges, outer ring | Not separately recorded | 2 |
| Tolerance class | Not separately recorded | Normal |
| Material, bearing | Not separately recorded | Bearing steel |
| Coating | Not separately recorded | Without |
| Sealing | Not separately recorded | Without |
| Relubrication feature | Not separately recorded | Without |
| Indicative carbon footprint for new product | Not separately recorded | 0.03 kg CO 2 e |
Logistics
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Product net weight | Not separately recorded | 0.009 kg |
Engineering — Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Diameter under rollers | F w | 12 mm |
| Outside diameter | D | 18 mm |
| Width | C | 12 mm |
| Chamfer dimension drawn cup (outer ring) | r | min. 0.8 mm |
Engineering — Calculation data
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Basic dynamic load rating | C | 6.27 kN |
| Basic static load rating | C 0 | 7.35 kN |
| Fatigue load limit | P u | 0.85 kN |
| Reference speed | Not separately recorded | 16000 r/min |
| Limiting speed | Not separately recorded | 18000 r/min |
INA HK1212 — 22 recorded parameters
Drawn cup needle roller bearing open end
Reference: Schaeffler medias — INA; source snapshot 2026-10-03.
HK1212 is an open-ended drawn-cup needle bearing: under-roller diameter Fw = 12 mm, cup outside diameter D = 18 mm and width C = 12 mm. Fw is not the bore of an included inner ring.
The catalogue lists suitable optional inner rings separately. Their own bores differ from Fw, so choose either a qualified shaft raceway or an identified inner ring before determining the shaft size.
The grease-lubrication limit and general limiting speed are separate values. A suffix or accessory seal does not automatically retain the same speed or width. Housing fit, raceway hardness and finish need the applicable installation specification.
Manufacturer product identity and parameters checked on 2026-10-03. A catalogue reference is not a certified drawing or an application approval.
Main Dimensions & Performance Data
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Under roller diameter | F w | 12 mm |
| Outside diameter | D | 18 mm |
| Width | C | 12 mm |
| Basic dynamic load rating, radial | C r | 6,500 N |
| Basic static load rating, radial | C 0r | 7,300 N |
| Fatigue load limit, radial | C ur | 880 N |
| Limiting speed | n G | 20,000 1/min |
| Limiting speed for grease lubrication | n G Grease | 12,000 1/min |
| Reference speed | n ϑr | 15,500 1/min |
| Weight | ≈m | 8.92 g |
Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Width, outer ring | C 1 | 12 mm |
| Minimum chamfer dimension | r min | 0.8 mm |
Temperature range
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Operating temperature min. | T min | -30 °C |
| Operating temperature max. | T max | 140 °C |
Additional information
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Sealing ring | Not separately recorded | SD12X18X3 |
| Sealing ring 2 | Not separately recorded | G12X18X3 |
| Suitable inner rings LR | Not separately recorded | LR8X12X12,5 |
| Suitable inner rings IR | Not separately recorded | IR8X12X12,5-XL |
Recorded construction
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Lubricant | Not separately recorded | Without |
| Lubrication hole | Not separately recorded | Without |
| Coating | Not separately recorded | Without |
| Sealing | Not separately recorded | Without |
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) |
|---|---|---|---|---|---|---|
| SKFHK 1212Drawn cup needle roller bearing with open ends |
| 6.27 kN | 7.35 kN | 16000 rpm | 18000 rpm | 0.009 kg9 g |
| INAHK1212Drawn cup needle roller bearing open end |
| 6.5 kN | 7.3 kN | 15500 rpm | 20000 rpm | 0.00892 kg8.92 g |
| KOYOHK1212Needle roller bearing |
| 6.61 kN | 7.29 kN | — | 14000 rpmLimiting Speeds(Grease Lub.): 14000 min-1Limiting Speeds(Oil Lub.): 22000 min-1 | 0.01 kg10 g |
| INAHK1212-AS1-BDrawn cup needle roller bearing open end |
| 6.5 kN | 7.3 kN | 15500 rpm | 20000 rpm | 0.008874 kg8.874 g |
| INAHK1212-B-L271Drawn cup needle roller bearing open end |
| 6.5 kN | 7.3 kN | 15500 rpm | 20000 rpm | 0.00919 kg9.19 g |
| INAHK1212-RR-BDrawn cup needle roller bearing open end |
| 6.5 kN | 7.3 kN | 15500 rpm | 20000 rpm | 0.008888 kg8.888 g |
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 |
|---|---|---|---|---|---|---|
| SKF HK 1212 | Without | Not recorded | Not recorded | Sheet steel | Bearing steel | None |
| INA HK1212 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO HK1212 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| INA HK1212-AS1-B | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| INA HK1212-B-L271 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| INA HK1212-RR-B | 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.
HK1212
Drawn cup needle roller bearing open end
View full technical record →KOYOHK1212
Needle roller bearing
View full technical record →SKFHK 1212
Drawn cup needle roller bearing with open ends
View full technical record →INAHK1212-AS1-B
Drawn cup needle roller bearing open end
View full technical record →INAHK1212-B-L271
Drawn cup needle roller bearing open end
View full technical record →INAHK1212-RR-B
Drawn cup needle roller bearing open end
View full technical record →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.