GUMMI A-20 flexible coupling
- Brand
- GUMMI
- Category
- Power transmission
- Subcategory
- Couplings
- Series
- Tipo A
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Description
GUMMI A-20 belongs to flexible coupling, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for A-20 and any equivalents.
A flexible coupling from the GUMMI Type A line, the A-20 joins two shafts while its elastic rubber center takes up vibration and small shaft misalignment. It ships in the CN arrangement, meaning two standard hubs, with a nominal torque of 38 Nm and a maximum bore of 20 mm.
On the A-20 the rubber center measures 95 mm across, and once the two hubs are fitted the assembly comes to 80 mm end to end. Torque capacity is rated at 38 Nm, and each hub can be bored out to 20 mm at most. Hubs leave the factory with a 10 mm pilot hole so a machine shop can open them to whatever shaft size the job calls for. Assembled weight is roughly 1.05 kg.
Typical installations include centrifugal pumps, fans, screw compressors, conveyor belts and machine tools. The coupling suits drives where vibration transfer between shafts needs to be limited and where slight misalignment has to be compensated. Low and medium power equipment with straightforward maintenance requirements is another common home for this model.
Sizing starts with the torque the drive actually transmits and the diameter of the two shafts being joined. The 20 mm bore ceiling sets the upper limit for hub machining, so anything larger needs a different size. Alignment at installation matters, since poor alignment puts extra load on the rubber element. In the CN setup the flexible center sits between the two hubs and is held in place with the matching screws.
If you are chasing an equivalent, send the code A-20 or the model you have on hand through WhatsApp. The team can point you to other Type A configurations and check variants with different bore sizes or rubber hardness. Bearings, mounted units, chains, sprockets, sheaves, belts, couplings, seals and maintenance tools are also part of what MR supplies to customers in the US and Latin America.
Dimensions
- Model
- A-20
- Configuration
- Two standard hubs (CN)
- Nominal torque
- 38Nm
- Max bore
- 20mm
- Pilot bore
- 10mm
- Elastic center Ø
- 95mm
- Overall length
- 80mm
- Weight
- 1,05kg
Frequently asked questions
- What does CN mean on the GUMMI A-20?
- CN identifies the two standard hub arrangement used in the Type A series. The rubber center is positioned between the hubs and fastened with screws, which is how torque passes through the coupling and misalignment gets absorbed.
- What torque and bore does the A-20 handle?
- Nominal torque is 38 Nm and the maximum bore is 20 mm. Hubs come with a 10 mm pilot hole that can be machined to the final shaft size. Those figures set the working limit for this coupling.
- How do I ask about another size or an equivalent?
- Send the code A-20 or the model you need on WhatsApp or by email. The team can review other Type A variants and suggest alternatives with different bores or configurations.