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MARIDT rollers and needles are made of material 1.3505 and have a hardness between 58 and 65 HRC.
Besides the standard cylindrical rollers MARIDT can also offer ZB rollers or rollers with special profiles according to customer’s requirements.
Roller tolerances | ||||||||||
Grade | Diameter | Gauge µ | Selection groups µ | Circularity Tdw µ | Roughness µ | Length tolerance µ | ||||
G2 |
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2 | 1,0 | 0,10 | Length up to < 20 mm + 0,000 - 0,030 |
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3 | 1,2 | 0,15 | |||||||
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3 | 2,0 | 0,25 | |||||||
G5 |
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5 | 1,2 | 0,15 | Length up to > 20 mm + 0,000 - 0,050 |
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5 | 1,5 | 0,20 | |||||||
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5 | 3,0 | 0,30 |
Needles can be supplied with flat ends (norm NRB) or with rounded ends (norm NRA).
Tolerances for needle rollers | ||||||||||||
Grade | Gauge µ | Circularity 1) Tdw µ | Roughness Ra µ | Length tolerance | ||||||||
G2 |
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1 | 0,2 | according H13 norm | ||||||
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G5 |
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2,5 | 0,25 | |||||||
1) The values are to be measured at the middle of the roller’s length. |
Rollers with special profiles can be supplied according to customer requirements.