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High-performance and reliable products that perfectly meet your needs
Gradel-Baudin product catalog
Thread transmission

Trapezoidal screws “Premium C45”

Our trapezoidal access screws made of C45 (1.0503) steel, obtained by cold forming (rolling) according to ISO 2901/2902 and DIN103 in tolerance 7e, are valued for their excellent straightness, pitch accuracy and high strength. We produce single right-hand and left-hand threads and double right-hand threads in lengths of 3 metres, up to and including Ø28, and in lengths of 6 metres and over.

vis trapézoïdales premium c45


All our screws can be delivered cut to any length. If not specifically requested, the bars will be delivered without chamfer and with the standard straightness. On request, we can supply chamfered and/or straightened bars. For all requests outside the standard length and characteristics, a preliminary price study is required. Depending on your requirements, we can also machine the ends of screws or perform additional operations on our standard nuts.

Trapezoidal screws

vis trapézoïdales panel vertical

Our threaded rods with trapezoidal threads are obtained by cold forming (rolling) according to ISO 2901/2902 and DIN103 in tolerance 7e. Our nuts are tapped by chip removal. We offer a complete range of high performance and reliable products that perfectly meet the needs of the market.

The roller burnishing of the sidewalls creates an excellent surface finish that will:

• increase nut life by reducing abrasion
• improve efficiency by reducing friction
• improve movement fluidity by reducing vibrations.

In addition, this process allows a high production rate with less raw material used.

Characteristic of trapezoidal profile


Ød = Nominal thread diameter
P = Thread pitch
Ød2 = d - 0,5P
Ød3 = d - 2h3 = d - p - 2Ac

ac = thread root play
Ac = ac + 0,075P
(in the case of rolled thread)
h3 = 0,5P + Ac = 0,5P + ac + 0,075P
H3 = 0,5P + ac

ØD1 = d – P
ØD2 = d – 0,5P
ØD4 = d + 2ac
R1 max = 0,5ac
R2 max = ac

Configure your own product

Schéma technique
Ø d1 max (mm)
Ø d1 min (mm)
Ø d2 max (mm)
Ø d2 min (mm)
Ø d3 max (mm)
Ø d3 min (mm)

La précision de nos vis est exprimée en microns pour 300 mm de filetage. Cette valeur est applicable en ± par rapport à la valeur théorique.
Exemple : pour une vis de classe 50, la valeur réelle mesurée du pas peut être comprise entre 299,95 et 300,05.

Pitch tolerance (mm/3000mm)

Nos vis sont produites avec une rectitude controlée. Cette caractéristique est mesurée suivant le protocole ci-dessous. Pour une rotation de barre, la déviation maximale est égale à ± la valeur de la rectitude annoncée. Une bonne rectitude supprime les vibrations et permet une vitesse de rotation plus élevée.
Exemple : pour une référence donnée avec une rectitude de 0,5, la valeur lue sur chaque comparateur, espacée comme sur la figure, doit être  inférieure à 1 mm pour une rotation complète de la barre.

Straightness (mm/300mm)
Helix angle
Weight (Kg/m)
Left / Right
A diameter less than 28mm does not allow a length greater than 3000mm for structural reasons.
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Note : The stock information is actual to date but not contractual. Availability and delivery time will be validated on the date of the order.
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