R series explosion-proof helical gear units | SEW-EURODRIVE

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Your benefits

Comprehensive offer
as the gear units offer finely stepped torques and gear ratios for use in potentially explosive atmospheres.

Easy combination
because you can easily combine an explosion-proof helical gear unit with an explosion-proof motor from our modular system.

Explosion-proof parallel-shaft helical gear units

The classic: Versatility and performance, even in potentially explosive atmospheres

Our explosion-proof helical gear units have equipment group II approval for categorie 2. They drive systems and machines in potentially explosive atmospheres.

A total of six single-stage and 15 two and three-stage sizes cover a performance range of 50 Nm to 18,000 Nm. This gear unit series is also far ahead in terms of gear unit ratios: from i = 1.30 to i = 289.74, in double gear units even i = 27,001. Torque ratings and gear unit ratios this finely stepped are hard to find on the market.

The R gear units also meet demands for high output speeds and light weight, of course. With a consistently high level of efficiency, our explosion-proof helical gear units offer an optimum ratio between torque output and installation space.

Only half the solution without a motor? Then use our sophisticated modular concept and combine the explosion-proof gear units of the R series with the explosion-proof motor of your choice.

Worldwide locations

Worldwide directives and standards

Surface and corrosion protection

AMS.. and AQS.. adapters

Extended Warranty

With our premium gear oil and grease we offer optimum protection.

DUO diagnostic unit

RX / R / RM series explosion-proof helical gear units

Gear units comply with directive 94/9/EC (ATEX), or as of April 20, 2016 of the EU Directive 2014/34/EU (ATEX), equipment group II, categorie 2, variant II2GD
- For use on the European market
- Accepted in China
- Accepted in Russia in combination with EAC certificates (formerly GOST-R)

Certified protection types:
- Protection type “c”: Protected by safe construction (design safety), EN13463-1 and -5
- Protection type “k”: Protected by liquid immersion, EN13463-1 and -8
All screws are secured against automatic loosening
Gear unit has a separate nameplate
High-quality oil seals
Lubricant can withstand high temperatures
Single or multi-stage
Foot- or flange-mounted
Foot- and flange-mounted
Flange-mounted with extended bearing hub

Highly efficient helical gear units in 6 frame sizes
High output speed, torque up to 830 Nm
Gear unit ratios up to i = 8.65
Available in foot or flange-mounted design

Sizes 57 / 67 / 77 / 87 / 97 / 107

Gear unit ratio	i	1.30 – 8.65
Max. output torque	Nm	69 – 830
Motor power range (Mounting via AM motor adapter)	kW	0.12 – 45

Applications in potentially explosive atmospheres with air/gas or air/dust mixtures according to directive 94/9/EC (ATEX), or as of April 20, 2016 of the EU Directive 2014/34/EU (ATEX)
Applications with equipment categories II2GD
Use with air mixtures
- With gases (G): in zones 1 and 2
- With dusts (D): in zones 21 and 22

Examples:
- Roller conveyors
- Belt conveyors
- Chain conveyors

Explosion-proof helical gear units with extended output bearing hub
Specifically designed for agitating applications
Ten frame sizes

Sizes 57 / 67 / 77 / 87 / 97 / 107 / 127 / 137 / 147 / 167

Gear unit ratio	i	4.29 – 289.74
Gear unit ratio – double gear units	i	134 – 27,001
Max. output torque	Nm	450 – 18,000
Motor power range (Mounting via AM motor adapter)	kW	0.12 – 160

Applications in potentially explosive atmospheres with air/gas or air/dust mixtures according to Directive 94/9/EC (ATEX), or as of April 20, 2016 of the EU Directive 2014/34/EU (ATEX)
Applications with equipment categories II2GD
Use with air mixtures
- With gases (G): in zones 1 and 2
- With dusts (D): in zones 21 and 22

Examples:
- Agitators
- Blenders
- Mixers
- Kneaders

Fifteen frame sizes allow for an optimum ratio between performance and space requirements
Finely stepped gear unit ratios up to i = 289.74; or i = 27,001 for double gear units
Available in foot or flange-mounted design
Also available with reduced backlash

Sizes 07 / 17 / 27 / 37 / 47 / 57 / 67 / 77 / 87 / 97 / 107 / 127 / 137 / 147 / 167

Gear unit ratio	i	3.21 – 289.74
Gear unit ratio – double gear units	i	90 – 27 001
Max. output torque	Nm	50 – 18,000^*
Motor power range (Mounting via AM motor adapter)	kW	0.09 – 160

Applications in potentially explosive atmospheres with air/gas or air/dust mixtures according to directive 94/9/EC (ATEX), or as of April 20, 2016 of the EU Directive 2014/34/EU (ATEX)
Applications with equipment categories II2GD
Use with air mixtures:
- With gases (G): in zones 1 and 2
- With dusts (D): in zones 21 and 22

Examples:
- Rotary tables
- Pumps and fans
- Waste water and sewage treatment plants
- Fans
- Roller conveyors
- Belt conveyors
- Chain conveyors
- Corner transfer units