Box bellows
All-round protection

Wherever machine parts such as guide rods, columns or traverses need all-round protection, box bellows from innoFlex® are the reliable solution. They are also the ideal cover for clamping and underrun protection under lifting tables due to their robustness and flexibility.

The design

The design principle of box bellows is similar to that of slideway protectors, but they enclose the machine parts on all four sides. Suitable materials are available for a wide range of applications. Box bellows are also stabilised (welded or stitched) by internal, CNC-manufactured support frames and are suitable for both vertical and horizontal coverings.

innoFlex® manufactures box bellows in standard in sizes from 40 x 40 mm to 6.000 x 1.500 mm (external measurements). Depending on the size, the Lmax can be up to 9.000 mm. Special sizes can also be made available. During movement, positive or negative pressure is generated within closed box bellows, which means they need to be ventilated. According to customer requirements, innoFlex® can integrate a sufficient number of ventilation units in their box bellows. innoFlex® supplies its box bellows ready for installation with metal flange or Velcro fastenings. On request, customer-specific hole patterns can be incorporated.

The protective functions

innoFlex® box bellows protect machine parts from …

All kinds of contamination
Metal and wood chips
Liquids
Grease and oil
Cooling emulsions
Flying sparks

… and people from …

Clamping/crushing injuries caused by moving machine parts
Underrunning of lifting tables

Reasons to choose box bellows from innoFlex®:

Excellent dimensional stability even under heavy loads
CNC-manufactured precision support frames
Precise running even for dynamic, high-speed processing
Available with ventilation units on request
Noise-insulating sliding units (optional) ensure smooth running
Extremely tear-resistant material
Precise, well-designed folding

Large selection of materials for the most diverse requirements
Special equipment for extreme material loads available
Suitable for ambient temperatures from –15 °C to +60 °C
Dust- and waterproof (except stitched version)
Type of fastening according to customer requirements
Easy to install
Maintenance-free

Product details

Material

To provide you with the best possible solution for your specific application, innoFlex® offers you a particularly broad range of materials for box bellows. After thoroughly analysing your requirements, we will work together with you to find the optimum material – and therefore the best box bellows for your application.

Box bellows — Material overview		Polyester fabric with black PU coating	Polyester fabric with black PU coating	Polyester fabric with black PU coating	Polyester fabric with black PU and PTFE coating	Aramid fabric coated with black PU	Polyester fabric coated with black PVC
Abbreviation		PPU02	PPU04s	PPU04w	PUT03	NPU03	PVC04
Material number		660	670	680	690	730	740
Material thickness		0.2	0.34	0.34	0.35	0.33	0.35
Mechanical properties at room temperature	Resistance to tearing / N / 50 mm / DIN EN ISO 1421	800	2000	2000	1500	700	1500
	Elongation at break / % / DIN EN ISO 1421	18	18	18	–	30	12
	Bending stiffness / cN / DIN 53121	5 to 5	22	14	20-45	100	10
	Water column / mm water column / DIN EN 20811	2000	2000	2000	2000	500	2000
	Resistance to bending Bally / revs / DIN 53351	40000	55000	46000	25000	40000	40000
Thermal behaviour	Flexible at low temperatures down to °C (applies to covering material only)	-20°C	-20°C	-20°C	-20°C	-20°C	-20°C
Thermal behaviour	Max. continuous operating temperature in °C (applies to the covering material only)	90°C	90°C	90°C	100°C	180°C	60°C
Resistance to	Dust
	Liquid-tight
	Water resistant
	resistant to cooling
	Chemical resistant
	flame retardant
	chip-resistant
	Resistant to welding and splashes
Max. continuous operating temperature in °C (applies to the covering material only)		Assessment:	excellent	good	Satisfactory	sufficient	insufficient
Guiding frame (PVC) at max. 60 °C

Please note:
If you are unable to find the right material for your specific application, just speak to one of our applications technicians. We will be happy to provide you with expert individual assistance.

Connections and accessories

In order to integrate the new box bellows in your application in a functionally reliable manner, innoFlex® offers you a wide range of connections and accessories. Just speak to our technicians about your specific application. Together we will find the ideal connections and accessories for your box bellows.