Nova Bearing FAQ | Miniature Bearings Questions & Answers
Q
What do the suffixes of your precision bearing models mean (e.g., ZZ/2RS/C3/P5)?
A
ZZ means double iron dust cover, 2RS is double rubber seal for dust and waterproof; C3 is radial clearance grade for high-speed working conditions; P5/P6 are precision grades (P5 is higher precision), P0 is the standard grade. All suffixes comply with international industry standards.
Q
Can your precision bearings be interchangeable with international brands (SKF/NSK/FAG)?
A
Yes, our standard precision/micro bearings are manufactured in strict accordance with ISO standards, and the dimensions, precision and performance are fully interchangeable with well-known international brands, which can be a cost-effective alternative.
Q
How to select the right precision/micro bearing for my equipment?
A
You only need to provide 4 key parameters: inner diameter × outer diameter × thickness, equipment working conditions (e.g., speed/load/temperature) and precision requirements. Our professional technical team will recommend the most suitable model for you for free.
Q
What is the difference between 60 and 62 series deep groove ball bearings?
A
60 series is the ultra-light width series with smaller outer diameter and thinner thickness, suitable for compact equipment; 62 series is the light width series with better load-bearing capacity, balancing high speed and stability, which is the most widely used general-purpose series.
Q
Do you provide free samples of precision bearings? What about the shipping cost?
A
We provide 1-5 pcs free standard samples for regular precision/micro bearings (e.g., 604ZZ/6203ZZ/625RS/625zz etc). The shipping cost is borne by the buyer, and we will choose the most cost-effective international courier (DHL/TNT/FEDEX) for you.
Q
What is the MOQ for your precision bearings? Is there a flexible MOQ for trial orders?
A
The MOQ for standard precision/micro bearings is 100 pcs; for trial orders of new customers, we support flexible MOQ (50 pcs) to help you test the product quality and matching performance with low cost.
Q
What are the requirements for custom non-standard precision bearings?
A
You only need to provide 2D/3D drawings or detailed parameters (size/accuracy/material/seal). Our engineering team will confirm the feasibility within 24 hours, and the custom MOQ is subject to the specific product design.
Q
Do you provide quality inspection reports for each batch of bearings?
A
Yes, every batch of precision bearings will go through 5 strict quality tests (dimension/precision/noise/rotation speed/wear resistance), and we will provide a batch-specific Quality Inspection Report (QIR) for free at the customer's request.
Q
What materials are your precision/micro bearings made of?
A
Our standard precision bearings use high-carbon chromium bearing steel (SUJ2/GCr15), with high hardness, wear resistance and fatigue resistance; for special working conditions (high temperature/corrosion), we support customization with stainless steel (440C/304).
Q
What is the lead time for your precision bearings?
A
In-stock standard products: 1-3 working days for delivery; bulk orders (1000+ pcs): 7-15 working days; custom non-standard products: 15-25 working days (specific time is confirmed according to the design).
Q
Which international shipping methods do you support?
A
We support all mainstream international shipping methods: express (DHL/TNT/FEDEX/UPS) for small orders (3-7 days delivery); air freight/sea freight for bulk orders (door-to-door delivery available). We will recommend the best shipping method according to your order quantity and delivery time.
Q
How do you package precision/micro bearings for international transportation?
A
Micro/precision bearings are packed with anti-rust oil + sealed plastic bag + foam liner for inner packaging, and hard carton + wooden case for outer packaging (for sea freight), which can effectively prevent rust, collision and damage during transportation.
Q
What is the payment term for bulk custom orders?
A
For bulk or custom orders, we adopt the 30% deposit in advance, 70% balance before delivery payment term. We will provide production progress photos/videos for the customer to check at any time during production.
Q
Can you customize bearings with my brand logo?
A
Yes, we support custom laser engraving of brand logo/Model number on the bearing outer ring for free (MOQ ≥ 500 pcs); we also support custom outer packaging (carton/box) with your brand logo (custom fee is subject to the design).
Q
What is your after-sales warranty policy for precision bearings?
A
We provide a 12-month quality warranty for all standard precision bearings from the date of delivery. If the product has quality problems (non-human damage) during the warranty period, we will provide free replacement or refund.
Q
Are your precision/micro bearings suitable for high-speed and high-precisionequipment such as medical devices,robotics, and aerospace?
A
Yes, our precision bearings (P4/P5 grade)are specifically designed for high-speed andhigh-precision applications. With advancedmanufacturing processes and strict qualitycontrol, they can meet the demandingrequirements of medical instruments,industrial robots, aerospace components,and other precision equipment, ensuringstable operation and long service life underextreme working conditions.
Contact Us
Deep Expertise: Specialized in precision miniature bearings, with a robust and vetted supply chain.
Cost Efficiency: Factory-direct cooperation ensures competitive wholesale prices for your business.
Custom Solutions: Tailored products available per your drawings or samples, supported by factory R&D.
