Flexible Hose Mandrels

Bell Plastics:  Experts and innovators in hose mandrels

Bell Plastics is the leading independent manufacturer of flexible plastic vulcanisation mandrels for the rubber hose industry.

We make mandrels from nylon, polyproylene, thermoplastic elastomers (eg Hytrel®/Arnitel®) and TPX®, all to our customers' individual requirements using a unique, specially-developed extrusion process, which produces mandrels without holes/voids, improving long term dimensional stability. 

Supported by our technical expertise and years of experience in this field, our mandrels help hose-makers reduce their total production costs and improve hose quality.

That's why successful hose manufacturers around world, from major multinational companies to smaller, ambitious local manufacturers, choose mandrels from Bell Plastics, the hose mandrel experts.

BellPlastics | Mandrel Range

Mandrel Range

Our wide product range includes a mandrel for almost every application. Our technical advice will help you choose the right one for you.  The range includes:

Type K nylon

Our standard, medium-flexibility nylon compound, suitable for the majority of hose production, particularly in the smaller diameters.  Like all our nylon mandrels, Type K mandrels have highly accurate and consistent diameters and are completely free from internal voids. Flexural modulus of this material ranges from 550MPa - 1050MPa 

Type R nylon

A higher-performance nylon compound, specially-modified for greater flexibility and better resistance to rubber chemicals than Type K.  Widely chosen for larger mandrel diameters. The flexural modulus of this material ranges from 450MPa - 600MPa

Type U nylon

With higher tensile strength than Type K, our Type U mandrels are preferred for manufacture of the smallest spiral hoses, and for other applications where the mandrel is under particularly high tension.  The flexiral modulus of this material ranges from 750 - 2700MPa

Type S nylon "Super-flex"

New! Our second new nylon mandrel grade, Type S ("Super-flexible), offers even more flexibility that Type R (flexural modulus 280-380MPa)


Polypropylene is a low cost material which can be used to produce braided hydraulic hose.  Polypropylene typically works best between 9.3mm (3/8") and 25mm (1").  We recommend nylon below and above these sizes as a result of nylons preferred tensile properties which prevent stretching at smaller diameters (6.2mm, 1/4") and greater flexibility above 25mm (1")


Where even greater flexibility is required, or where nylons are incompatible with the hose material, we offer mandrels in a range of Arnitel® and Hytrel® grades and  like our nylon mandrels, our Hytrel® mandrels are all solid, void-free and have no central wire (unless desired).


Our TPX® (polymethylpentene) mandrels are very flexible, have excellent chemical resistance and stability, and are easy to eject from the finished hose, making them preferred for certain applications.  Please contact us for further details.


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To find out more...

Consult our FAQs for answers to more questions you might have about Bell Plastics' flexible plastic vulcanisation mandrels

Check out our downloads for more technical information

Contact us to discuss you own application in detail and to request a quotation


Hytrel® is a registered trademark of E.I. Du Pont de Nemours and Company.  TPX® is either a registered trademark or trademark of Mitsui Chemicals, Inc.

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