MURTFELDT Spann-Box G 2 20B-2

Product Details

Description

The Murtfeldt Spann-Box G 2 is a high-quality automatic chain tensioner, engineered to provide constant and reliable tension for drive and conveyor chains. This model is equipped with a curved guide profile specifically designed for duplex roller chains of the 20B-2 type. Its robust steel housing and the self-lubricating, wear-resistant green plastic guide ensure a long service life and minimal maintenance, effectively reducing operational noise and component wear.

Specifications

• Manufacturer: Murtfeldt
• Product Line: Spann-Box
• Model: Size G 2
• Guide Profile for Chain Type: 20B-2 (Duplex Roller Chain)
• Housing Material: Steel, black coated
• Guide Material: Original Werkstoff ‘S’ (UHMW-PE), green
• Tensioning System: Internal spring mechanism

Label Info

• Brand: SPANN-BOX
• Embossed Markings: Murtfeldt Kunststoffe, G 2, 20B-2

Application

Ideal for use in conveyor systems, packaging machinery, food processing equipment, and general industrial applications where reliable chain tensioning is crucial for operational efficiency and longevity of the drive system.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned item, you are helping to avoid the emission of approximately 10.0 kg of CO2, which would be generated in the production of a new unit. This promotes a sustainable, circular economy.

Availability

This item is in stock and ready for immediate dispatch. It is a new old stock item in excellent condition. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the correct way to install the Spann-Box G 2?

First, mount the Spann-Box without fully tightening it, allowing some play against the chain. Then, release the tensioning springs one by one. Once the guide profile is pressing against the chain, slide the unit into its final position and securely fasten it using the locking screws.

What kind of environment is the ‘Original Werkstoff S’ material suitable for?

The green guide is made from ultra-high-molecular-weight polyethylene (UHMW-PE), which offers excellent resistance to abrasion, impact, and many chemicals. It is suitable for a wide range of industrial environments, including those with moisture, but should not be used in applications with continuous temperatures above 80 deg Celsius.

How do I know when the tensioner needs replacement?

Regularly inspect the green guide profile for signs of excessive wear, such as deep grooves or significant material loss. The tensioner itself is very durable, but the guide is a wear part. Replace the guide profile when wear impacts chain performance or if the tensioning force diminishes noticeably.

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Last Update: Friday, March 13, 2026