Custom made hole rubber square tube sleeve

A square tube sleeve provides a rubber covering around a square section, with a custom opening and profile to suit the mating component. The inside corners should fit the tube's corner shape as carefully as the straight sides fit its width.

Measure the finished section and any coating before selecting the sleeve. ETOL can vary size, material, hardness and color. Include changes in width along the engagement length, since a small taper or local weld can obstruct a sleeve that fits at the end.

Fit the sleeve evenly over the section without stretching one corner ahead of the others. Keep the tube end smooth so it cannot cut the rubber internally. If the sleeve includes a hole that must align with another feature, establish that orientation before seating it fully. After fitting, check the corners for excessive tension and ensure the opening remains unobstructed. During removal, work around the perimeter rather than pulling one thin edge hard enough to turn the sleeve inside out or tear its corner.

Material options

Rubber compound options, customized alongside the profile and contact conditions.

Hardness selection

Solid rubber options: 30–90 Shore A. Fit the sleeve evenly over the section without stretching one corner ahead of the others.

Custom geometry

The inside corners should fit the tube's corner shape as carefully as the straight sides fit its width.

Fit evaluation

After fitting, check the corners for excessive tension and ensure the opening remains unobstructed.

Color & OEM

Custom colors; identification clear of folds and end connections.

Photos illustrate structure or material appearance only. A square tube sleeve provides a rubber covering around a square section, with a custom opening and profile to suit the mating component. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.