Bal-tec™ Home Custom Made Rollers
Straight precision rollers can be custom manufactured from a variety of materials. Rollers usually fall into two quality levels. Precision ground rollers are held to plus or minus two ten thousands of an inch tolerance on diameter ( ± 0.0002", .005 mm ) with a 6 micro inch "Ra" surface finish. Precision lapped rollers are held to plus or minus one ten thousands of an inch tolerance on diameter ( ± 0.0001", .0025 mm ) with a 2 microinch "Ra" surface finish.
We produce very high quality cylindrical bearing rollers and short cylindrical parts. Ground parts are typically held straight and round within .0001 of an inch with a 6 microinch finish. Size is held to a plus or minus of two ten thousands of an inch. If finer quality is required, the ground parts can be cylindrically lapped. After lapping typical parts are straight and round within fifty millionths of an inch with a 2 microinch finish. Size is held to a plus or minus .0001 of an inch.
We can produce parts that have a total quality envelope in the 2 micro inch range; but their cost is prohibitive for most applications. Rollers have some unique properties that must be identified. The information required on an order includes quantity, size, length and material. The standard roller bearing materials are chrome alloy steel, E52100, with a minimum hardness of 60 HRC or type 440c-hardened stainless steel at 58 HRC minimum.
All rollers are custom made, so each order must be quoted.
|Precision ground roller||± 0.0002"|
|Precision lapped roller||± 0.0001"||± 0.00005"||± 0.005"|
|Straight Cylindrical Rollers||± 0.0002"||± 0.0001"||± 0.005"|
|Standard Dimensional Tolerance for Straight Cylindrical Rollers||Lapped rollers with ground ends||Ground rollers with machined ends|
|Roundness — 0.0001 inches.||Diameter Size — ± 0.0001 inches.||Diameter Size — ± 0.0002 inches.|
|Overall Length - ± .005 inches.||Roundness — 0.00005 inches.|
|Overall Length - ± .005 inches.|