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605 Deep Groove Ball Bearing 5x14x5mm
When the housing bore is capped at 14mm and the shaft is fixed at 5mm, the 605 bearing is the only standard deep groove bearing that fits. It sacrifices load capacity to save 2mm OD over the 625 bearing and 5mm over the 635 bearing, trading strength for envelope space.
Key Specifications
- Sealing: Open, ZZ (metal shields), 2RS (NBR rubber contact seals). ZZ retains full rated speed.
- Speed and Load: 1.33 kN dynamic (Cr), 0.51 kN static (Cor). 43,000 RPM open/ZZ; 34,000 RPM with 2RS seals.
- Axial Load: Supports 10-12% of radial rating in CN clearance. Approximately 0.13-0.16 kN sustained.
- Temperature: -40 to 120 C with standard grease. High-temperature polyurea options extend to 150 C.
- Material and Precision: GCr15 bearing steel (AISI 52100 equivalent). ABEC-3 standard; ABEC-5 and ABEC-7 available.
For any inquiries, please contact with our Supporting Team at sales@yuanhecd.com.
| Model | 605 |
| Bore (d) | 5 mm |
| OD (D) | 14 mm |
| Width (B) | 5 mm |
| Type | Open / Shielded / Sealed |
| ABEC | ABEC-3 |
| Material | GCr15 bearing steel (AISI 52100) |
| Dynamic Load Cr | 1.33 kN |
| Static Load Cor | 0.51 kN |
| Max Speed | 43,000 RPM (open/ZZ) 34,000 RPM (2RS) |
| Temperature | -40 to 120 C |
Bore x OD x Width
5 x 14 x 5 mm
Dynamic Load Cr
1.33 kN
Static Load Cor
0.51 kN
Max Speed
43,000 RPM
Sealing
Open / ZZ / 2RS
Precision
ABEC-3
Shielding and Lubrication
The 605 ZZ bearing uses non-contact SPCC steel shields pressed into the outer ring. At 14mm OD, the shield diameter is small enough that centrifugal distortion at 43,000 RPM is negligible; the labyrinth gap remains stable across the full speed range. Each bearing ships at 25-35% fill with lithium soap grease. For embedded applications where field relubrication is not practical, the initial grease fill covers the design life under light to moderate loads.
The 605 2RS bearing variant uses nitrile contact seals on the inner ring shoulder. At 5mm bore and 5mm width, the seal contact area is small enough that friction torque increase is approximately 15-20% over the open bearing. The speed penalty is modest compared to larger bearings: 2RS seals limit speed to 34,000 RPM rather than the more severe reductions seen in the 30mm-bore class. This makes the 605 2RS bearing practical for sealed-for-life applications where neither relubrication nor shield gaps are acceptable.
Performance
At 1.33 kN dynamic and 0.51 kN static, the 605 bearing carries the lowest load ratings in the 5mm-bore 6-series. The 625 bearing (5x16x5mm, 1.73 kN Cr) adds 2mm OD for 30% more capacity. The 635 bearing (5x19x6mm, 2.34 kN) adds 5mm OD and 1mm width for 76% more capacity. Select the 605 bearing only when 14mm OD is the hard constraint. If the housing bore can reach 16mm, the 625 bearing provides a meaningful load margin. If 19mm fits, the 635 bearing delivers the maximum capacity for a 5mm shaft.
ABEC-3 tolerance is standard. For optical encoder and micro-spindle applications where radial runout must stay below 2 microns, ABEC-5 and ABEC-7 grades are available. C2 radial clearance eliminates internal play for preloaded miniature assemblies where the housing fit and shaft fit together produce a light interference after mounting. The 605 bearing fits deep groove ball bearing applications where OD space governs the design.
OEM and Customization
Yuanhe manufactures the 605 bearing to customer specifications. Common OEM customizations include C2 clearance for preloaded encoder and micro-spindle assemblies, stainless steel (AISI 440C) rings and balls for medical handpieces and laboratory instruments, and low-noise polyurea or ester grease for applications where bearing tone must stay below 28 dB. For vacuum environments, PFPE grease with 440C stainless steel is available. Standard lead time is 7 to 15 days. Submit drawings or existing part numbers for a quote, or contact Yuanhe directly.
Applications
Dental handpieces and micro-drills
Optical and magnetic rotary encoders
Miniature cooling fans and blowers
Model aircraft and micro-drone motors
Laboratory micro-centrifuges
Medical infusion pump mechanisms
Precision instrument spindles
Fiber optic gyroscope gimbals
Robotic end-effector joints
Frequently Asked Questions
Why choose a 605 bearing over a 625 bearing for a 5mm shaft? +
Choose the 605 bearing when the housing OD is limited to 14mm and no larger bore is available. The 605 bearing saves 2mm OD compared to the 625 bearing (16mm OD) at the cost of 30% less dynamic capacity (1.33 kN vs 1.73 kN). If the load allows and the housing wall thickness is fixed by an existing design, the 605 bearing fits without redesign. If the housing can be bored to 16mm, the 625 bearing provides extra load margin for the same shaft diameter.
Can the 605 bearing run at 43,000 RPM with grease lubrication? +
Yes, in open or ZZ configuration with standard lithium soap grease, 43,000 RPM is the reference speed for light loads. The small bearing cross-section means the rolling element pitch diameter is approximately 9.5mm, keeping centrifugal force on the grease low. For sustained operation at this speed, polyurea grease with synthetic ester base oil (ISO VG 10-15) resists channeling. For applications above 43,000 RPM, oil-mist lubrication extends the practical limit to approximately 50,000 RPM.
What shaft and housing fits are correct for a 605 bearing in a precision instrument? +
For a 605 bearing in an optical encoder or micro-spindle, standard fits are: shaft j5 (5mm +0.003/-0.002) and housing J6 (14mm +0.004/-0.004). This combination produces a light interference on the shaft and a transition fit in the housing, controlling radial play to within 2-5 microns after mounting. For C2 clearance bearings where preload is desired, tighten the shaft to k5 (+0.006/+0.001) to consume more initial clearance and produce a controlled preload condition.
Is the 605 bearing available with ceramic balls for high-speed use? +
Yes, Yuanhe supplies hybrid 605 bearings with silicon nitride (Si3N4) balls and GCr15 or 440C stainless steel rings. Ceramic balls reduce rotating mass by approximately 60% compared to steel, lowering centrifugal load on the outer raceway at high speed. The lower density also reduces ball skidding during rapid acceleration. For non-magnetic applications such as MRI-compatible instruments, full ceramic bearings (Si3N4 balls and zirconia rings) are available. Specify material requirements when requesting a quote.
