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Special Spacers and Rolled Tubular Components

Other fixture elements

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SPIROL specializes in replacing costly machined and cold-formed components with less expensive roll-formed product.  SPIROL’s proprietary manufacturing technology enables  the  cost-effective  production  of  special  tubular  products  that  meet  the  performance requirements of the comparatively more expensive alternatives

SPECIAL LENGTHS
Any length from 2.5mm to 150mm (.094” to 6”) subject to some limitations relative to diameter and wall thickness.

SPECIAL INSIDE DIAMETERS
Any diameter between ø2mm to ø26mm (ø.078” to ø1”).  Reduced tolerances are also available.

SPECIFIED OUTSIDE DIAMETERS
The outside diameter can be specified with minimum and maximum tolerances, but it is then suggested to specify the inside diameter with only a reference dimension or only a minimum dimension rather than a minimum/maximum tolerance to reduce cost.

BOTH DIAMETERS SPECIFIED
In situations that require both the inside and outside diameters to be specified with toleranced dimensions, a decision needs to be made as to which dimension should have the tighter tolerance so that the raw material tolerance can be properly allocated.

GAP
Spacers are usually butted with minimal or no gap.  The gap can be specified from “no gap” to a toleranced or maximum specified gap.

SPECIAL WALL THICKNESS
The ideal thickness is 15% of the mean inside diameter up to a maximum of 3.5mm (.140”).  A range of 10% to 25% of the mean inside diameter is possible depending on material type and tolerance requirements.

SPECIAL LENGTH TOLERANCES
Standard Spacers have a generous length tolerance to keep the cost down.  Reduced tolerances can be provided to 0.05mm (.004”), and in some instances even these tolerances can be further reduced.  Since tight tolerances increase costs, tolerances should be tailored to the needs of the application to eliminate unnecessary expense.

INCREASED COLUMNAR STRENGTH
Can be achieved through increased wall thickness, higher strength material, or by using materials that can be heat treated.  Given that columnar strength is application dependent, SPIROL’s Applications Engineering team should be consulted whenever the Spacer will be used in a critical load bearing path.

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