YDTech® manufacturer of hardened rollers needle rollers (HRC58~62) G2G3G5! supplier of cylindrical rollers (chrome steel & stainless steel) in china.
rounded end needle rollers
rounded end needle rollers are a type of needle roller commonly used in needle roller bearings. as the name suggests, these rollers have rounded ends, which differentiate them from flat-ended needle rollers.
the rounded shape helps distribute stress more evenly along the contact surface between the rollers and the bearing races, reducing the risk of stress concentration and potential damage.
rounded end needle rollers facilitate better distribution of lubricant within the bearing assembly, promoting smoother operation and reducing friction and wear.
flat ended needle rollers and cylindrical rollers
It is widely used in auto, lathe, metallurgical, textile, printing industry & other various machinery equipment. With this kind of bearing, machine design can realize the goal of small-scale & lightweight.
needle rollers main use is as rolling elements in bearings where they are particularly useful when space is limited and a high radial load is required. They are also useful as locating pins and mini shafts.
we have over 20 years of manufacturing experience of precision rolelrs. we had most stock, delivery time: send to europe, USA, or canada only 3-5 work days
we are professional manufacture of bearing rollers and cylindrical needle rollers. we produce rollers of diameter 0.5 mm to 60 mm. the rollers could satisfy the request of DIN 5402 G2 rollers.
standard sizes of needle rollers and cylindrical rollers
| φ1x5.8 | φ1x6.8 | φ1x7.8 | φ1x9.8 | ||||||
| φ1.5x5.8 | φ1.5x6.8 | φ1.5x7.8 | φ1.5x9.8 | φ1.5x11.8 | φ1.5x13.8 | ||||
| φ2x6.8 | φ2x7.8 | φ2x9.8 | φ2x11.8 | φ2x13.8 | φ2x15.8 | φ2x17.8 | φ2x19.8 | ||
| φ2.5x7.8 | φ2.5x9.8 | φ2.5x11.8 | φ2.5x13.8 | φ2.5x15.8 | φ2.5x17.8 | φ2.5x19.8 | φ2.2x21.8 | ||
| φ2.5x23.8 | |||||||||
| φ3x9.8 | φ3x11.8 | φ3x13.8 | φ3x15.8 | φ3x17.8 | φ3x19.8 | φ3x21.8 | φ3x23.8 | ||
| φ3x25.8 | φ3x27.8 | φ3x29.8 | |||||||
| φ3.5x11.8 | φ3.5x13.8 | φ3.5x15.8 | φ3.5x17.8 | φ3.5x19.8 | φ3.2x21.8 | φ3.5x23.8 | &phi 3.5x25.8 | ||
| φ3.5x27.8 | φ3.5x29.8 | φ3.5x34.8 | |||||||
| φ4x11.8 | φ4x13.8 | φ4x15.8 | φ4x17.8 | φ4x19.8 | φ4x21.8 | φ4x23.8 | φ4x25.8 | ||
| φ4x27.8 | φ4x29.8 | φ4x34.8 | φ4x39.8 | ||||||
| φ5x15.8 | φ5x17.8 | φ5x19.8 | φ5x21.8 | φ5x23.8 | φ5x25.8 | φ5x27.8 | φ5x29.8 | ||
| φ5x34.8 | φ5x39.8 | φ5x49.8 | |||||||
| φ5.5x17.8 | φ5.5x19.8 | φ5.5x21.8 | φ5.5x23.8 | φ5.5x25.8 | φ5.5x27.8 | φ5.5x29.8 | |||
| φ5.5x31.8 | φ5.5x34.8 | φ5.5x37.8 | φ5.5x39.8 | ||||||
| φ6x17.8 | φ6x19.8 | φ6x21.8 | φ6x23.8 | φ6x25.8 | φ6x27.8 | φ6x29.8 | φ6x34.8 | ||
| φ6x39.8 | φ6x49.8 | φ6x59.8 | |||||||
| loose needle rollers,cylindrical rollers, needle rolling elements, bearing,precision needle rollers | |||||||||
|---|---|---|---|---|---|---|---|---|---|
diameter tolerances, outer diameter surface roughness
| grade tolerance | ▽Rwamax | DwLamax | Dwmpabmax | SDwmax | I CDwcmax | diameter gauge value (μm) | |||
|---|---|---|---|---|---|---|---|---|---|
| G2, | 0.2mm, | 1mm, | -2mm, | -4mm, | -2/-4mm, | 2mm | |||
| G2, | 0.2mm, | 1mm, | -3mm, | -5mm, | -3/-5mm, | 2mm | |||
| G2, | 0.2mm, | 1mm, | -4mm, | -6mm, | -4/-6mm, | 2mm | |||
| G2, | 0.2mm, | 1mm, | -5mm, | -7mm, | -5/-7mm, | 2mm | |||
| G2, | 0.2mm, | 1mm, | -6mm, | -8mm, | -6/-8mm, | 2mm | |||
| G2, | 0.2mm, | 1mm, | -7mm, | -9mm, | -7/-9mm, | 2mm | |||
| G2, | 0.2mm, | 1mm, | -8mm, | -10mm, | -8/-10mm, | 2mm | |||
| G3, | 0.2mm, | 1.5mm, | 0mm, | -3mm, | 0/-3mm, | 3mm | |||
| G3, | 0.2mm, | 1.5mm, | 1.5mm, | -4.5mm, | 1.5/-4.5mm, | 3mm | |||
| G3, | 0.2mm, | 1.5mm, | -3mm, | -6mm, | -3/-6mm, | 3mm | |||
| G3, | 0.2mm, | 1.5mm, | -4.5mm, | -7.5mm, | -4.5/-7.5mm, | 3mm | |||
| G3, | 0.2mm, | 1.5mm, | -6mm, | -9mm, | -6/-9mm, | 3mm | |||
| G3, | 0.2mm, | 1.5mm, | -7mm, | -10mm, | -7/-10mm, | 3mm | |||
| G5, | 0.2mm, | 2.5mm, | 0mm, | -5mm, | 0/-5mm, | 5mm | |||
| G5, | 0.2mm, | 2.5mm, | 0mm, | -5mm, | 0/-5mm, | 5mm | |||
| G5, | 0.2mm, | 2.5mm, | -3mm, | -8mm, | -3/-8mm, | 5mm | |||
| G5, | 0.2mm, | 2.5mm, | -5mm, | -10mm, | -5/-10mm, | 5mm | |||
| needle rollers, precision rollers, bearing rollers, roller bearings parts, cylindrical rolling elements | |||||||||
length tolerances of needle rollers
| Lw/mm > | Lw/mm < | TLw(h13)U | TLw(h13)L | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 3, | 6, | 0, | -0.18 | ||||||
| 6, | 10, | 0, | -0.22 | ||||||
| 10, | 18, | 0, | -27 | ||||||
| 18, | 30, | 0, | -33 | ||||||
| 30, | 50, | 0, | -39 | ||||||
| 50, | 80, | 0, | -46 | ||||||
| cylindrical rollers, precision rollers, bearing rollers, roller bearings parts, cylindrical rolling elements | |||||||||
chamfer limits of flat ends needle rollers
| Dwexceed | Dwto | TSmin | diameter direction TSmin | axis direction TSmin | |||||
|---|---|---|---|---|---|---|---|---|---|
| - | 1 | 0.1 | 0.3 | 0.5 | |||||
| 1 | 1.5 | 0.1 | 0.4 | 0.6 | |||||
| 1.5 | 3 | 0.1 | 0.6 | 0.8 | |||||
| 3 | 6 | 0.1 | 0.9 | 1 | |||||
| needle rollers, needle roller bearings, miniature pins, needle rollers suppliers, precision shafts | |||||||||
V-block measurement for roundness of needle rollers
| angle | wave numbers | ||||||||||
| 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | ||
| 90°C | 2 | 2 | - | - | 2 | 2 | - | - | 2 | 2 | |
| 120°C | 1 | 2 | 2 | 1 | - | - | 1 | 2 | 2 | ||
| needle rollers, needle roller bearings, miniature pins, needle rollers suppliers, precision shafts | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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