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Deep Groove Ball Bearing
681XZZmini bearing 1.5x4x2mm stable quality high speed low noise chrome steel samples are available.
Model number:681XZZ / 681X / 681
Size: 1.5x4x1.2mm
Material: Chrome Steel (GCr15) / Stainless Steel (AISI 440C)
weight: 0.0001KG
Specification
RMO supplies 681XZZ, 681X and 681 miniature deep groove ball bearings for compact motors, precision instruments, small transmission systems and other space-limited assemblies. These miniature bearings are available in different bore, outer diameter, width, material and closure configurations to match specific shaft sizes and installation requirements.
For buyers replacing an existing 681XZZ bearing or specifying a new miniature bearing, confirm the bearing number and d × D × B dimensions before ordering.
| Model | Bore ID (d) | Outer Diameter (D) | Width (B) | Type |
|---|---|---|---|---|
| 681XZZ | 1.5 mm | 4 mm | 2 mm | Double metal shielded |
| 681X | 1.5 mm | 4 mm | 1.2 mm | Open miniature bearing |
| 681 | 1 mm | 3 mm | 1 mm | Open miniature bearing |
Important: 681XZZ, 681X and 681 are not dimensionally identical. If you are replacing an existing micro bearing, check the bearing marking or measure the bore, outer diameter and width before requesting a quote.
| Model Number | 681XZZ / 681X / 681 |
| Size | 1.5x4x1.2mm |
| Weight | 0.0001KG |
| Material | Chrome Steel (GCr15) / Stainless Steel (AISI 440C) |
| Clearance | C2 C0 C3 C4 |
| Precision Grade | p0 |
| Dynamic Load Rating | 32 N |
| Static Load Rating | 12 N |
| Max Speed (Grease Lubrication) | 180,000 RPM |
| Payment | 100% T/T or 30% T/T before production, 70% before delivery |
| Lubrication | Pre-lubricated with High-Performance Grease |
| Temperature Range | -20°C to +120°C |
| Lead Time | 3-5 Days |
Need load rating, permissible speed, detailed tolerances, grease information or application-specific technical data? Contact RMO with your operating conditions and required quantity for confirmation.
681XZZ Mini Bearing Overview
The 681XZZ Mini Bearing is a super-small deep groove ball bearing designed for compact precision devices that demand smooth rotation, low noise, and high-speed performance.
With advanced manufacturing accuracy and durable materials, the 681XZZ bearing is widely used in micro motors, robotics, medical devices, office automation, and instrumentation systems.
Built to ISO standards, RMO’s miniature bearings deliver exceptional consistency, longevity, and performance stability across diverse applications.As a trusted Deep Groove Ball Bearing Manufacturer,RMO ensures every bearing meets strict quality requirements for precision, durability, and smooth operation.
| Requirement | Recommended Model | Reason |
|---|---|---|
| 1.5 mm shaft with dust protection | 681XZZ bearing | 1.5 × 4 × 2 mm with double metal shields |
| 1.5 mm shaft with minimum bearing width | 681X bearing | 1.2 mm width for very compact assemblies |
| 1 mm shaft and extremely limited space | 681 bearing | 1 × 3 × 1 mm miniature structure |
If your design requires another sealing structure, precision level, clearance or lubrication method, RMO can review the requirement through our custom bearing service.
Related Products
| Bearings No. | ID(d*D*B)mm | Weight (KG) | Bearings No. | ID(d*D*B)mm | Weight (KG) |
| 681xzz | 1.5*4*2 | 0.0001 | 6811ZZ | 55*72*9 | 0.081 |
| 681 | 1*3*1 | 0.0001 | 6812ZZ | 60*78*10 | 0.106 |
| 681X | 1.5*4*1.2 | 0.0001 | 6813ZZ | 65*85*10 | 0.13 |
| 682ZZ | 2*5*2.3 | 0.0002 | 6814ZZ | 70*90*10 | 0.14 |
| 682XZZ | 2.5*6*2.6 | 0.0003 | 6815ZZ | 75*95*10 | 0.145 |
| 683 | 3*7*2 | 0.0005 | 6816ZZ | 80*100*10 | 0.154 |
| 684ZZ | 4*9*4 | 0.0015 | 6817ZZ | 85*110*13 | 0.27 |
| 685ZZ | 5*11*5 | 0.002 | 6818ZZ | 90*115*13 | 0.285 |
| 686ZZ | 6*13*3.5 | 0.002 | 6819ZZ | 95*120*13 | 0.3 |
| 687 | 7*14*3.5 | 0.003 | 6820ZZ | 100*125*13 | 0.313 |
| 688ZZ | 8*16*5 | 0.003 | 6821ZZ | 105*130*13 | 0.325 |
| 689ZZ | 9*17*5 | 0.003 | 6822ZZ | 110*140*16 | 0.515 |
| 6800ZZ | 10*19*5 | 0.005 | 6824ZZ | 120*150*16 | 0.56 |
| 6801ZZ | 12*21*5 | 0.006 | 6826ZZ | 110*140*16 | 0.8 |
| 6802ZZ | 15*24*5 | 0.007 | 6828ZZ | 140*175*18 | 0.85 |
| 6803ZZ | 17*26*5 | 0.008 | 6830 | 150*190*20 | 1.16 |
| 6804ZZ | 20*32*7 | 0.019 | 6832 | 160*200*20 | 1.23 |
| 6805ZZ | 25*37*7 | 0.022 | 6834 | 170*215*22 | 1.63 |
| 6806ZZ | 30*42*7 | 0.026 | 6836 | 180*225*22 | 2.03 |
| 6807ZZ | 35*47*7 | 0.029 | 6838 | 190*240*24 | 2.62 |
| 6808ZZ | 40*52*7 | 0.033 | 6840 | 200*250*24 | 2.73 |
| 6809ZZ | 45*58*7 | 0.04 | 6844 | 220*270*24 | 3 |
| 6810ZZ | 50*65*7 | 0.052 | 6848 | 240*300*28 | 4.6 |
For another bore, outer diameter or width, send us your required bearing dimensions for model matching and quotation.
The 681XZZ bearing uses metal shields on both sides. The shields help retain lubricant and reduce the entry of larger dust particles while maintaining lower running resistance than contact rubber seals.
681XZZ is suitable when the assembly requires a compact 1.5x4x2 bearing with basic contamination protection. For clean enclosed assemblies where minimum width is more important, the open 681X may be a better option.
| Closure | Protection | Running Resistance | Typical Selection |
|---|---|---|---|
| Open | Low | Lowest | Clean, enclosed mechanisms |
| ZZ Metal Shield | Moderate | Low | Small motors, instruments and compact mechanisms |
| 2RS Rubber Seal | Higher | Higher | Applications requiring stronger contamination protection |
Availability of specific sealing configurations varies by miniature bearing size. Send your required model to RMO for confirmation.
GCr15 is the standard choice for many miniature deep groove ball bearing applications requiring stable hardness, wear resistance and smooth rotation under normal operating conditions.
AISI 440C can be selected where improved corrosion resistance is required. It is suitable for miniature bearing applications exposed to higher humidity or environments where chrome steel is less appropriate.
Send us the application environment if you are unsure which bearing material to specify.
Standard 681XZZ miniature bearings are available with P0 precision. Clearance options include C2, C0, C3 and C4.
The correct clearance depends on shaft fit, housing fit, operating temperature and rotational conditions. For OEM equipment or high-speed miniature mechanisms, provide these conditions before placing a bulk order so the appropriate configuration can be confirmed.
| Application | Why Miniature Bearings Are Used |
|---|---|
| Micro Motors | Small shaft size, compact installation and smooth rotation |
| Precision Instruments | Small bearing envelope and controlled rotational movement |
| Small Actuators & Robotics | Suitable for compact rotating and transmission components |
| Office Automation Equipment | Supports small rotating shafts where low friction is required |
| Cooling Fans | Compact bearing size for small rotating assemblies |
| Micro Transmission Systems | Fits assemblies with limited radial and axial installation space |
Application suitability should be confirmed according to actual load, speed, temperature, mounting fit and required service life.
Bearing model: 681XZZ, 681X, 681 or another miniature bearing number
Dimensions: bore × outside diameter × width
Closure: open, ZZ or required sealed version
Material: GCr15 chrome steel or stainless steel
Precision: standard or higher precision requirement
Internal clearance: if specified by your equipment design
Operating conditions: speed, load, temperature and environment
Quantity: sample, trial order or bulk procurement
If you are replacing another manufacturer's bearing, send the original bearing number, bearing photos or measured dimensions. RMO can help check the corresponding 681XZZ bearing equivalent or suitable miniature bearing size.
681XZZ is a standardized miniature bearing designation used by multiple bearing manufacturers, but internal design, lubrication, clearance and precision may differ between suppliers.
If you need a replacement for an existing 681XZZ, L-415ZZ or another equivalent 1.5x4x2 miniature bearing, send us:
Original bearing brand and model
d × D × B dimensions
Shield or seal type
Equipment/application
Operating speed if known
Required quantity
Our team will check dimensional compatibility and available RMO bearing options before quotation.
RMO supplies 681XZZ bearings, 681X bearings, 681 bearings and other miniature deep groove ball bearings for OEMs, equipment manufacturers, distributors and replacement-parts buyers.
Samples available for product evaluation
Standard and bulk quantity supply
Chrome steel and stainless steel options
Clearance and lubrication requirements can be discussed
Custom marking and packaging support
Technical details available according to application requirements
For additional bearing sizes and configurations, view our Deep Groove Ball Bearings or browse the complete RMO Bearing Products
Looking for 681XZZ bearings, 681X mini bearings, 681 bearings or another small deep groove ball bearing? Send RMO the bearing model, dimensions, material, closure type, application and required quantity.
For detailed tolerances, load ratings, speed limits, grease specifications or special operating requirements, contact us before ordering. We can provide technical information based on the exact bearing configuration you require.
Request 681XZZ Bearing Price & Technical Data
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