Specification
Version in Plastic
Types
- Type C: With tapped hole (no bushing)
- Type E: With tapped bushing
Plastic KU
Duroplast (Phenolic PF)
- Flash removed and polished finish
- Red RT, similar RAL 3003: add RT on order code
- Steel, zinc plated (standard version)
- Brass MS add MS on order code (only in black version)
Plastic KT
Technopolymer (Polyamide PA)
- Black, matte finish (standard color)
- Red RT, similar RAL 3003: add RT on order code
Bushing (Type E)
Steel, zinc plated
Version in Steel
Types
- Type K: With plain hole H7
Steel ST
Polished
Version in Aluminium
Types
- Type K: With plain hole H7
Aluminium AL
Polished
Version in Stainless Steel
Types
- Type K: With plain hole H7
Stainless Steel AISI 303 NI
Matte shot-blasted
Version in Plastic (Press on type)
Types
- Type L: With tolerance ring
- Type M: With tapered bore
Type L
Plastic KU
Duroplast (Phenolic PF)
Black, shiny finish
Tolerance ring
Spring steel
Type M
Plastic KT
Technopolymer (Polyamide PA)
Information
When ball knobs DIN 319 (Press on type) type L and M are used the shaft does not require a thread.
During mounting, easy blows with a soft hammer are sufficient to drive the knob into place, the shaft end should be slightly rounded or chamfered (30°).
Before the assembly of the knobs, type L the tolerance ring is to be inserted into the drilling. Further it is to be noted that the button is put on perpendicular and / or axially parallel. Otherwise the knob may break.
Type M ball knobs are a cheaper solution, however, the pulling off force is less predictable.
Ball knobs DIN 319 in sizes 30 and 35, as well as various thread of type C and ball knobs made of technopolymer (KT) are not on the official DIN standard sheet.
Ball knobs DIN 319 made of steel, aluminum and stainless steel are not on the official DIN standard sheet.
