10Pcs - SMR126ZZ （ 6x12x4 mm） Bearing Stainless Steel Ball Bearings 6*12*4mm

Description

WHY 440C STAINLESS steel?
Good corrosion resistance to water and many weak chemicals
Corrosion resistance can be improved by passivation
Good for temperatures up to 300°C
Slightly softer than chrome steel so lower load ratings
Will corrode in salt water or salt spray and poor resistance to acids/alkalis
More expensive than chrome steel
TECHNICAL SPECS
Item: SMR126ZZ
Structure: Deep Groove
Material: 440C Stainless Steel ( prefix "S" )
Bore Dia (d): 6 mm
Outer Dia (D): 12 mm
Width (B): 4 mm
Closures: Metal Shielded(ZZ)
Lubrication: Grease
Magnetic: little
Hardness: 58HRC
Corrosion Resistance: General
Clearance: C0
Grades: ABEC Grades 1
Dynamic Load Rating (Cr) (Newtons): 609
Static Load Rating (Cor) (Newtons): 236
Ball Qty: 8
Ball Dia (Dw): 1.588 mm
Weight: 1.66 g
Quantity: 1 Lot = 10 PCS
What is 440C?
A martensitic stainless steel. It's composed of these major alloy elements (I don't list the minor elements since they don't play a major role):
Carbon: 0.95-1.25% This increases hardenability and wear resistance, but decreases toughness in higher amounts.
Manganese: 45% This is added to reduce brittleness and improve forgeability, hardenability, and reducing deformation.
Silicon: 30% This is a deoxidizer and improves hot-forming properties.
Chromium: 17.00-18.00% Added only to high alloy tool steels, this improves hardenability, high wear resistance, toughness, and corrosion resistance.
Molybdenum: 50% Improves deep hardening and toughness.
These basic elements (along with iron) are a simple combination that works well together, and has for many decades.
This alloy is technically classified as UNS (Unified Numbering System) S44044. It's also classified as SAE (Society for Automotive Engineers) as 51440C.
The American Iron and Steel Institute classifies it as 440C martensitic standard stainless steel. Most modern knifemakers simply call it 440C.
Shipping Terms
When you place an order, please choose a shipping method and pay for the order including the shipping fee. We will send the items within 3 days once your payment is completed.
We do not guarantee delivery time on all international shipments due to differences in customs clearing times in individual countries, which may affect how quickly your product is inspected. Please note that buyers are responsible for all additional customs fees, brokerage fees, duties, and taxes for importation into your country. These additional fees may be collected at time of delivery. We will not refund shipping charges for refused shipments.
The shipping cost does not include any import taxes, and buyers are responsible for customs duties.
Return Policy
We do our best to serve our customers the best that we can.
We will refund you if you return the items within 15 days of your receipt of the items for any reason. However, the buyer should make sure that the items returned are in their original conditions. If the items are damaged or lost when they are returned, the buyer will be responsible for such damage or loss, and we will not give the buyer a full refund. The buyer should try to file a claim with the logistic company to recover the cost of damage or loss.
The buyer will be responsible for the shipping fees to return the items.
Warranty & Maintenance
We offer the 1-month free replacement. Buyers may request for a replacement within 15 days from your receipt of the product. The buyer should return the product in the original conditions to us and should bear the shipping costs for return.
We also provide 12-month free maintenance. The buyer should return the product in the original conditions to us and should bear the shipping costs for return. If any part is required to be replaced, the buyer should also pay for the costs of the parts to be replaced.
Before returning the items, please confirm the return address and the logistics method with us. After you give the items to the logistic company, please send us the tracking number. As soon as we receive the items, we will repair or exchange them ASAP.
Feedback
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If you have any problems with our items or services, please feel free to contact us first before you leave negative feedback. We will do our best to solve any problem and provide you with the best customer services.
On Mar-26-20 at 20:44:13 PDT, seller added the following information: