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Drawn Cup Needle Roller Bearing, Outer Ring (HK2820LL/3AS)
- On Sale Till 31/03/2025
A bearing in which an outer ring is formed from a thin steel plate by precision drawing, the raceway surface is surface-hardened, and then a needle-shaped roller and a retainer are assembled.
[Features]
・ It has the smallest cross-sectional height of any bearing with an outer ring, enabling space reduction and cost savings.
・ Compact design is possible with the shaft directly as the raceway surface without using the inner ring.
・ The outer ring has a structure in which the needle roller and the retainer are not separated.
・ Retaining rings are not required for fixing in the axial direction by simply press-fitting into a rigid housing with an appropriate fit.
[Applications]
・ Heavy load, high speed, gearbox for automobiles, etc.
・ Steel equipment, mining / construction machinery, machine tools.
(i)Caution
- Some of the items are scheduled to be discontinued in the near future.
There are no the replacement for these items and no plans to resume sales. Please check the quotation and order screen for details. - Product supply for some items in this series are unstable and may experience either longer delivery time or sales suspension.
Japanese Only
Part Number
Configured Part Number is shown.
HK2820LL/3AS
Drawing
HK type, HMK type (Open-ended type)
HK, ZWD type (Open-ended type)
BK type (Closed end type)
BK ‥ ZWD type (Closed end type)
Product features details
Shell-type needle roller bearings that can reduce space and cost
It is a bearing in which an outer ring is formed from a thin steel plate by precision drawing, the raceway surface is surface-hardened, and then a needle-shaped roller and a retainer are assembled (as for the part numbers with "M" in the suffix, they are heat treated after assembling). It has the smallest cross-sectional height of any bearing with an outer ring, enabling space reduction and cost savings.
Usually, a design is taken in which the shaft is directly used as the raceway surface without using the inner ring. The outer ring has a structure in which the needle-shaped roller and the retainers are not separated, and the bearing is easy to handle because it does not require a retaining ring to fix it in the axial direction, just by press-fitting it into a rigid housing with an appropriate fit.
Type, structure, and features of shell needle roller bearings
| Type | Compatible shaft diameter (mm) | Nominal Number | Composition and dimensions | Note | ||
|---|---|---|---|---|---|---|
| HK (HK・・T2) | Standard Series | Open End | ø3 to ø50 | HK0609T2 | Diameter of Inscribed Circle: ø6 Width dimensions: 9 T2: Resin retainer | Since the suffix T2 uses a polyamide resin molding retainer, the allowable temperature should be 120°C, and 100°C or less for continuous use. Premium shell bearings have F in the suffix. See CATNO.3029 (Premium Shell Bearing) for details. Those with an M in the suffix are heat-treated products after assembly. (Pre-vent specifications) |
| HK・・L | Open End One-sided seal | ø12 to ø50 | HK2018L/3AS | Diameter of Inscribed Circle: ø20 Width dimensions: 18 L: One-sided seal 3AS: Grease | The seal type (tailing symbol: L or LL) with a built-in synthetic rubber sealing seal on one side or both sides has lithium soap-based grease sealed inside. To prevent deterioration of the seal and grease, the operating temperature should be -20 to 120°C, and within 100°C for continuous use. This type has a shorter roller length and a smaller rated load than the open type with the same dimensions. | |
| HK・・LL | Open End Double-sided seal | ø12 to ø50 | HK2020LL/3AS | Diameter of Inscribed Circle: ø20 Width dimensions: 20 LL: Double-sided seal 3AS: Grease | ||
| HK・・ZWD | Open End Double row type | ø15 to ø30 | HK2030ZWD | Diameter of Inscribed Circle: ø20 Width dimensions: 30 ZW: Retainer double row D: Outer ring lubrication hole | This type has a lubrication hole in the outer ring. | |
| HMK (HMK・・T2) | Open End | ø8 to ø50 | HMK2015 | Diameter of Inscribed Circle: ø20 Width dimensions: 15 | Since the suffix T2 uses a polyamide resin molding retainer, the allowable temperature should be 120°C, and 100°C or less for continuous use. | |
| HMK・・L | Open End One-sided seal | ø8 to ø50 | HMK2018L/3AS | Diameter of Inscribed Circle: ø20 Width dimensions: 18 L: One-sided seal 3AS: Grease | The seal type (tailing symbol: L or LL) with a built-in synthetic rubber sealing seal on one side or both sides has lithium soap-based grease sealed inside. To prevent deterioration of the seal and grease, the operating temperature should be -20 to 120°C, and within 100°C for continuous use. This type has a shorter roller length and a smaller rated load than the open type with the same dimensions. | |
| HMK・・LL | Open End Double-sided seal | ø8 to ø50 | HMK2021LL/3AS | Diameter of Inscribed Circle: ø20 Width dimensions: 20 LL: Double-sided seal 3AS: Grease | ||
| HMK・・ZWD | Open End Double row type | ø38 to ø50 | HK3845ZWD | Diameter of Inscribed Circle: ø38 Width dimensions: 45 ZW: Retainer double row D: Outer ring lubrication hole | This type has a lubrication hole in the outer ring. | |
| BK (BK・・T2) | Closed End | ø3 to ø50 | BK2020C | Diameter of Inscribed Circle: ø20 Width dimensions: 20 C: Welding retainer | Since the suffix T2 uses a polyamide resin molding retainer, the allowable temperature should be 120°C, and 100°C or less for continuous use. | |
| BK・・L | Closed End One-sided seal | ø12 to ø50 | BK2018L/3AS | Diameter of Inscribed Circle: ø20 Width dimensions: 18 L: One-sided seal 3AS: Grease | This seal type (suffix: L) has lithium soap-based grease sealed inside. To prevent deterioration of the seal and grease, the operating temperature should be -20 to 120°C, and continuous use should be within 100°C. | |
| BK・・ZWD | Closed End Double row type | ø15 to ø30 | BK2030ZWD | Diameter of Inscribed Circle: ø20 Width dimensions: 30 ZW: Retainer double row D: Outer ring lubrication hole | This type has a lubrication hole in the outer ring. | |
About allowable rotational speed
The permissible rotational speed is the permissible rotational speed that can be achieved based on the following assumptions.
- Use under conditions where an appropriate amount of grease recommended by NTN is sealed, and the heat generated by sufficient familiar operation, cooling of the outer cylinder, etc., is removed.
- Use with constant pressure preload.
| Part Number |
|---|
| HK2820LL/3AS |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | RoHS | Raceway Ring Shape | Load Direction | Outer Ring | Inner Dia. d (Ø) | Outer Dia. D (Ø) | Width B (mm) | Inner/Outer Ring Material | Number of Raceway Ring Rows | Size Standards | Rolling Element Material | Outer Ring Type | Retainer Type | Basic Load Rating: Dynamic Load (N) | Sealing Structure | Lubricant | Format symbol | Holder Symbol | Specifications | Revolution Frequency (rpm) | Series | Case hardening (outer ring only) | Outer ring oil hole | Premium shell bearing | Post-assembly heat treatment (pre-bent type) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SGD 8.00 | 1 Piece(s) | 7 Day(s) or more | - | Needle Roller | Radial | With Outer Ring | 28 | 35 | 20 | Steel | Single Row | Metric System | Steel | Flat | - | 21300 | Double-sided Seal Type | Available | HK | - | Open End Double-sided Seal | 8500 | Standard | NA | NA | NA | NA |
Loading...
Basic Information
| Specifications/Environment | Standard |
|---|
Please check the type/dimensions/specifications of the part HK2820LL/3AS in the Drawn Cup Needle Roller Bearing, Outer Ring series.
Specification/Dimensions
-
Retainer Type
- Resin Forming
- Weld Shape
-
Holder Symbol
- T2 (Polyamide Resin Forming Holder)
- C (Weld Holder)
-
type
- 7E-HMK
- 7□□
- BK
- DCL
- HK
- HMK
-
Raceway Ring Shape
- Needle Roller
-
Load Direction
- Radial
- Thrust
-
Outer Ring
- With Outer Ring
-
Inner Dia. d(Ø)
-
Outer Dia. D(Ø)
-
Width B(mm)
-
Inner/Outer Ring Material
- Steel
-
Number of Raceway Ring Rows
- Single Row
- Double Row
-
Size Standards
- Metric System
- Inch Base
-
Rolling Element Material
- Steel
-
Outer Ring Type
- Flat
-
Sealing Structure
- Double-sided Seal Type
- Double-sided seal type
- NA
- One-sided Seal Type
-
Lubricant
- Available
- N/A
- NA
-
Format symbol
-
Specifications
- Closed End
- Open End
- Open End Double-sided Seal
- Open End Multiple-Row Type
- Open End One-sided Seal
-
Revolution Frequency(rpm)
-
Series
- Heavy Load
- Heavy duty
- Inch
- Standard
-
Case hardening (outer ring only)
- Case hardening
- N/A
- NA
-
Outer ring oil hole
- Available
- N/A
- NA
-
Premium shell bearing
- Available
- N/A
- NA
-
Post-assembly heat treatment (pre-bent type)
- Available
- N/A
- NA
-
CAD
- 2D
- 3D
Days to Ship
-
- All
- Same day
- 4 Day(s) or Less
- 7 Day(s) or Less
- 8 Day(s) or Less
- 10 Day(s) or Less
- 13 Day(s) or Less
Specify Alterations
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
Similar Part Numbers
| Part Number |
|---|
| 7E-HMK3220 |
| 7E-HMK3230 |
| 7E-HMK4020 |
| HK3012 |
| HK3016LL/3AS |
| HK3018L/3AS |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | RoHS | Raceway Ring Shape | Load Direction | Outer Ring | Inner Dia. d (Ø) | Outer Dia. D (Ø) | Width B (mm) | Inner/Outer Ring Material | Number of Raceway Ring Rows | Size Standards | Rolling Element Material | Outer Ring Type | Retainer Type | Basic Load Rating: Dynamic Load (N) | Sealing Structure | Lubricant | Format symbol | Holder Symbol | Specifications | Revolution Frequency (rpm) | Series | Case hardening (outer ring only) | Outer ring oil hole | Premium shell bearing | Post-assembly heat treatment (pre-bent type) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SGD 12.72 | 1 Piece(s) | 10 Day(s) or more | - | Needle Roller | Radial | With Outer Ring | 32 | 42 | 20 | Steel | Single Row | Metric System | Steel | Flat | - | 27500 | NA | NA | HMK | - | Open End | 5000 | Heavy Load | Case hardening | NA | NA | NA | ||
SGD 13.73 | 1 Piece(s) | 10 Day(s) or more | 10 | Needle Roller | Radial | With Outer Ring | 32 | 42 | 30 | Steel | Single Row | Metric System | Steel | Flat | - | 41500 | NA | NA | HMK | - | Open End | 5000 | Heavy Load | Case hardening | NA | NA | NA | ||
SGD 15.10 | 1 Piece(s) | 10 Day(s) or more | - | Needle Roller | Radial | With Outer Ring | 40 | 50 | 20 | Steel | Single Row | Metric System | Steel | Flat | - | 32500 | NA | NA | HMK | - | Open End | 4000 | Heavy Load | Case hardening | NA | NA | NA | ||
SGD 5.60 | 1 Piece(s) | 4 Day(s) or more | - | Needle Roller | Radial | With Outer Ring | 30 | 37 | 12 | Steel | Single Row | Metric System | Steel | Flat | - | 13000 | NA | NA | HK | - | Open End | 5500 | Standard | NA | NA | NA | NA | ||
SGD 8.30 | 1 Piece(s) | 8 Day(s) or more | - | Needle Roller | Radial | With Outer Ring | 30 | 37 | 16 | Steel | Single Row | Metric System | Steel | Flat | - | 18100 | Double-sided Seal Type | Available | HK | - | Open End Double-sided Seal | 8000 | Standard | NA | NA | NA | NA | ||
SGD 9.93 | 1 Piece(s) | 10 Day(s) or more | - | Needle Roller | Radial | With Outer Ring | - | - | - | Steel | Single Row | Metric System | Steel | Flat | - | - | One-sided Seal Type | Available | HK | - | Open End One-sided Seal | 5500 | Standard | N/A | N/A | N/A | N/A |
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