Case-Hardened 20CrMnTi HK-2RS Series Sealed Drawn Cup Needle Roller Bearings
Grade, hardness, corrosion behavior, service temperature and the full bore range for this material.
Case-Hardened 20CrMnTi HK-2RS Series Sealed Drawn Cup Needle Roller Bearings are made from 20CrMnTi (GB/T 3077), of the same class as 20MnCr5 and SAE 8620 — carburized to a hard case over a tough, unhardened core. Corrosion behavior: none of its own; protected in service exactly as through-hardened bearing steel is. The material is magnetic, and the usable service range is similar to through-hardened rings — about +120 °C without special stabilization. In practice this material is chosen for shock loading and for heavy ring sections, where a tough core resists the cracking a fully through-hardened section would not survive.
Material
20CrMnTi (GB/T 3077), of the same class as 20MnCr5 and SAE 8620 — carburized to a hard case over a tough, unhardened core
Corrosion resistance
None of its own; protected in service exactly as through-hardened bearing steel is
Magnetic response
Magnetic
Service temperature
similar to through-hardened rings — about +120 °C without special stabilization
Property figures are typical for the material. In an assembled bearing the lubricant, the seals and the cage frequently reach their limits before the material does, so check all four against the duty. Material certification is available on request for production orders.
Case-Hardened 20CrMnTi HK-2RS Series Sealed Drawn Cup Needle Roller Bearings: Chosen for shock loading and for heavy ring sections, where a tough core resists the cracking a fully through-hardened section would not survive. The material decides the corrosion behavior — none of its own; protected in service exactly as through-hardened bearing steel is and the temperature the part will stand (similar to through-hardened rings — about +120 °C without special stabilization), and it is the reason the alternatives below exist. Properties, limits and the full size table follow.
Why Case-Hardened 20CrMnTi for HK-2RS Series Sealed Drawn Cup Needle Roller Bearings
Chosen for shock loading and for heavy ring sections, where a tough core resists the cracking a fully through-hardened section would not survive. In a hk-2rs series sealed drawn cup needle roller bearings it is the steel of the rings and, in most designs, of the rolling elements.
Carburizing puts the hardness where the rolling contact is and leaves the core tough, so the ring can absorb shock and heavy section stresses that would crack a through-hardened ring. It is the usual choice for large roller bearing rings and for anything that gets hit rather than merely loaded.
Material Properties
Grade designation
20CrMnTi (GB/T 3077), of the same class as 20MnCr5 and SAE 8620 — carburized to a hard case over a tough, unhardened core
Magnetic response
Magnetic
Service temperature
Similar to through-hardened rings — about +120 °C without special stabilization
Corrosion characteristic
None of its own; protected in service exactly as through-hardened bearing steel is
Service Limits
The case has a depth, and that depth is a design limit: load high enough and the maximum shear stress moves below the hardened case into the softer core, where the surface then collapses. That is why case depth is specified against the rolling element size and the load, and why a case-hardened ring is not simply a tougher version of a through-hardened one.
Alternatives and When to Switch
Through-hardened GCr15 is the alternative and the default: it is used wherever the section is modest and the load is steady, which is most of the catalog. Case-hardened rings earn their place under shock and in large sections.
Sizes of HK-2RS Series Sealed Drawn Cup Needle Roller Bearings Available in Case-Hardened 20CrMnTi
Designation
Bore Fw (mm)
Outer diameter D (mm)
Width C (mm)
HK0810-2RS
8
12
10
HK1010-2RS
10
14
10
HK1012-2RS
10
14
12
HK1210-2RS
12
16
10
HK1212-2RS
12
16
12
HK1512-2RS
15
21
12
HK1612-2RS
16
22
12
HK1616-2RS
16
22
16
HK1812-2RS
18
24
12
HK2012-2RS
20
26
12
HK2016-2RS
20
26
16
HK2516-2RS
25
32
16
HK2520-2RS
25
32
20
HK3016-2RS
30
37
16
HK3020-2RS
30
37
20
HK3520-2RS
35
42
20
HK4020-2RS
40
47
20
Other ways to specify the HK-2RS Series Sealed Drawn Cup Needle Roller Bearings
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the designation snaps the other fields to that size's standard values; you can then override any individual value.
Sends the selected values to the quote form below.
Our facility
The numbers come off our own machines
Every ring is gauged for bore and outside diameter, every assembly for radial internal clearance to ISO 5753-1, and every finished bearing for vibration. That is why the values on this page are quotable rather than indicative.
Request a Quote
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (ISO 3245 / DIN 618-1)
Designation
Bore Fw (mm)
Outer diameter D (mm)
Width C (mm)
HK0810-2RS
8
12
10
HK1010-2RS
10
14
10
HK1012-2RS
10
14
12
HK1210-2RS
12
16
10
HK1212-2RS
12
16
12
HK1512-2RS
15
21
12
HK1612-2RS
16
22
12
HK1616-2RS
16
22
16
HK1812-2RS
18
24
12
HK2012-2RS
20
26
12
HK2016-2RS
20
26
16
HK2516-2RS
25
32
16
HK2520-2RS
25
32
20
HK3016-2RS
30
37
16
HK3020-2RS
30
37
20
HK3520-2RS
35
42
20
HK4020-2RS
40
47
20
Video: Case-Hardened 20CrMnTi HK-2RS Series Sealed Drawn Cup Needle Roller Bearings
Third-party video, selected automatically for this topic. It is not produced by Bushing Bearings and is not a specification source — use the tables on this page for dimensional data.
Frequently Asked Questions
Can a standard bearing run above 120 °C?
Not without being ordered for it. Standard rings are heat stabilized for use to about +120 °C; above that they grow and lose their fit unless a stabilized version is specified. The grease, the seals and a polymer cage usually reach their limits at or below that temperature too.
Are Case-Hardened 20CrMnTi HK-2RS Series Sealed Drawn Cup Needle Roller Bearings magnetic?
Case-Hardened 20CrMnTi is magnetic.
What temperature can Case-Hardened 20CrMnTi HK-2RS Series Sealed Drawn Cup Needle Roller Bearings run at?
The usable range for the material is similar to through-hardened rings — about +120 °C without special stabilization. In an assembled bearing the lubricant, the seals and the cage frequently give out before the material does, so check all four against the duty.
What corrosion resistance does Case-Hardened 20CrMnTi give?
Corrosion behavior: none of its own; protected in service exactly as through-hardened bearing steel is.
How do I request a quotation?
Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.
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