What are parallel keys DIN 6885 form A?

Parallel keys DIN 6885 form A (round-ended, high-sized version) are mechanical linking elements that enable a reliable, non-rotatable connection between a shaft and a hub, allowing torque to be transmitted and preventing relative rotation.

What is the difference between parallel keys DIN 6885 form A (round-ended, high-sized version) and the parallel keys DIN 6885 form B (straight-ended, high-sized version)?

The main difference lies in the design of their end faces:Round-ended (form A): Parallel keys DIN 6885 form A have rounded ends on both sides. This rounding facilitates installation, as it fits into the corresponding curves of the keyway openings in the shaft and hub. The round end form is suitable for applications where easy assembly and disassembly are required, and where the parallel key connection does not need to be released frequently.Straight-ended (form B): In contrast, parallel keys DIN 6885 form B have straight end faces. These straight ends fit into keyways with a correspondingly right-angled opening. Parallel keys with straight ends can enable better power transmission in certain applications, especially when high torques are involved or when a more precise positioning of the parallel key is needed.Both forms are available in a high-sized version, which indicates their relative thickness and thus their ability to transmit power. The choice between these two forms depends mainly on the specific application, the requirements for assembly and disassembly, and the configuration of the shaft-hub connection.

Which dimensions are available for parallel keys DIN 6885 form A?

The sizes vary from A 2x2x6 to A 100x50x400, with widths from 2 to 100 mm, heights from 2 to 50 mm, and lengths from 6 to 400 mm.

What material are parallel keys DIN 6885 form A typically made of?

Parallel keys compliant with this standard are usually made of key steel DIN 6880 or stainless steel and feature a bright surface.

In which areas of application are parallel keys used?

Parallel keys are used in a wide range of fields such as mechanical engineering, agricultural technology, vehicle construction, wind power, and automation technology to secure critical connections, such as in gearboxes, couplings, and drive shafts.

What are the advantages of parallel keys DIN 6885 form A?

They offer reliable power transmission, easy assembly/disassembly, high adaptability thanks to various sizes and materials, durability due to high-quality materials, and cost efficiency.

How does form A specifically contribute to the performance of the parallel keys?

The specific form A, with its profile, improves load distribution and power transmission by fitting seamlessly into the corresponding slots of the shaft and hub.

What safety instructions and standards must be observed when using parallel keys DIN 6885 form A?

It is essential to observe safety instructions such as wearing protective equipment and using the correct tools, as well as complying with the DIN 6885 standard for shapes, dimensions, and tolerances.

How is the assembly of a parallel key according to DIN 6885 form A carried out?

Assembly involves precisely inserting the parallel key into the slot on the shaft and fitting the hub so that the slot in the hub is aligned with the parallel key, followed by final inspection and alignment of the assembly.

Why is the correct selection of size and material for parallel keys important?

A correct selection ensures an optimal fit and functionality of the machine elements, is crucial for compatibility with other components, and meets the specific requirements of the application.

How does the easy assembly and disassembly of parallel keys contribute to cost-effectiveness?

By avoiding special tools or procedures, time and costs are saved, especially during maintenance and repair work, which reduces overall costs and improves efficiency.

mbo Osswald is supplier of parallel key, parallel keys, according to DIN 6885 form A round-ended, high-sized version. mbo Osswald delivers these machine elements in material steel and stainless steel.

Parallel key similar to DIN 6885 form A round-ended A 4x4x35 Stainless steel

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Undercut steel (1.0715/1.0718) Stainless steel (1.4305) Stainless steel A2 (1.4301) Stainless steel A4 (1.4404)

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r1 chamfering (all sides), bevelled or rounding of manufacturer's choice
r2 rounding of groove bottom for shaft and hub
* similar to DIN 6885

Article no.

10 37 0404 0350/000

Identifier

Parallel key similar to DIN 6885 form A round-ended, high-sized version

Size

A 4x4x35*

Material group

Stainless steel

Surface

bright

Width b

Height h

for shaft Ø d1 above

for shaft Ø d1 up to

Shaft groove width b

Shaft groove depth t1 [with back clearance]

2,5

Shaft groove depth t1 [or oversize Tolerance]

+0,1

Hub groove width b

Hub groove depth t2 [with back clearance]

1,8

Hub groove depth t2 [with oversize]

1,2

Hub groove depth t2 Tolerance

+0,1

d2 Minimum dimension d1+

Bevelled/Rounded r1 min.

0,16

Bevelled/Rounded r1 max.

0,25

Rounding of groove bottom r2 max.

0,16

Rounding of groove bottom r2 min.

0,08

Length l

Length l Tolerance key

-0,2 -0,3

Length l Tolerance groove

+0,2 +0,3

Material

Stainless steel