Bottom knives

We are happy to offer you individual dimensions in addition to the standard ones.

Outer diameter	105–300 mm
Inner diameter	60–250 mm
Standard thicknesses	15 / 20 / 25 mm
Standard cutting angle	3°

Bottom knives from DIENES

DIENES is the world’s leading precision supplier of industrial circular knives, knife holders and slitting systems. Of course, bottom knives are also part of the product portfolio.

Use of bottom knives

Bottom knives are usually mounted on electric motor-driven engines. Since the bottom knives are screwed to the motor flange, a quick change of knives is ensured. On the basis of the geometric design, a distinction is made between:

Cup knives with one-sided cutting edge
T-shaped bottom knives with cutting edges on both sides.

Optionally, both variants can be equipped with carbide-tipped cutting edges to increase their service life.

Tool-free knife change of bottom knives

Your advantages

Highest cutting performance due to optimised surface quality and material selection
Exact manufacturing tolerances
Can also be used at high cutting speeds
Fastening holes ensure a quick change of knives
DIENES polish„CONTROLLEUR“
Versions with one-sided and double-sided cutting edge arrangement
Can be used for a wide range of machine types
Regrindable in manufacturer quality

Standard dimensions

Outer-Ø (d1) mm	Inner-Ø (d2) mm
60 / 80 / 90	105
130	90 / 100
150	120
180	150
200	138 / 144 / 150
240	140 / 188
250	140 / 188
300	250

Downloads

Data sheet Bottom Knives (PDF)

Enquiry form – Bottom knives

For special inquiries you can also contact our contact persons directly.

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Significantly reduce risk of injury with lower blade with safety catch groove

Incorrect positioning of the knife holder and incorrect stroke sequence can cause particles to detach from the top or bottom knife at high cutting speeds. It can also happen that the carbide ring separates from the knife holder of the bottom knife, loosens or is damaged. To minimize this danger, DIENES has developed bottom knives with safety catch grooves. In the event of a wandering movement, the top knife is caught in this groove. Thus, no damage or breakage of the bottom knife is possible anymore. Secure this savings potential for yourself.

Collars from DIENES

High-quality collars are important for locking bottom knives (grooving knives and circular knives) and allow fastening in any position when fastening screws.

Our collars

Unique knife quality

The quality of our knives is particularly close to our hearts and is especially important for our customers. Learn here what makes a good knife and how to recognize it.

Our quality promise