Select Series Single Sigma Arm Mixer

Select Series Single Sigma Arm Mixers

Shaffer® Select Series Single Sigma Arm Mixers are precisely engineered to offer maximum value and durability and are ideal for rotary moulded cookies, crackers, biscuits, corn tortillas, muffins, sweet doughs, granola bars, stiff fillings and pet foods.


All stainless steel plate and tube construction with heavy-duty components for maximum durability


Open frame construction with round tube cross members and watertight enclosures for easy sanitation


Designed with well-known, commonly stocked-components for easy maintenance and operation


Engineered to provide optimal performance at maximum value


Select Series Single Sigma Arm Mixers Resources

Usable Bowl Volume
Rated Bowl Volume
900 lb / 408 kg
25.2 cu ft / 705 L
20.6 cu ft / 583 L
1200 lb / 544 kg
30.0 cu ft / 849 L
24.5 cu ft / 698 L
1600 lb / 726 kg
37.0 lb / 1047 L
30.3 cu ft / 858 L



Open Frame Design

All stainless steel plate and tube construction with watertight enclosures for the drive and hydraulic systems

Stainless Steel Product Zone

Bowl, agitator and canopy

Belt Drive

Single end belt drive in watertight enclosure

Variable Speed Agitator Drive

20 HP, 30 HP, 40 HP or 50 HP standard

Bowl Discharge

Standard discharge heights of 36″ (914 mm), 39″ (991 mm), 42″ (1067 mm) and 45″ (1143 mm)

Positive Pressure Side Bowl Seals

Constructed of food-grade material that forms against canopy to provide exceptional bowl sealing

Metal Detectable UHMW

Positive pressure front and rear bowl seals

Rotary Face Agitator Shaft Seals (U.S. Patent No. 10,174,842)


Hydraulic Bowl Tilt Systems

With jog and tilt using single hydraulic cylinder for forward tilt up to 110°

Bowl Mounting Bearing

Bowl tilts on a laminate composite bearing

Heavy Duty Stainless Steel Canopy

Ingredient inlets available

Watershed® Operator Panel Enclosure

Allen Bradley or Siemens operator panel and controls, and push buttons with universal labels for frequently used functions. Operator panel located on right-hand side of the mixer*

Bolt on Legs

6″ (152 mm), 9″ (229 mm), 12″ (305 mm) and 15″ (381 mm) standard leg heights

Grout Kit

Anchor bolts and grout for sanitary mixer installation

NEMA 4 White Powder Coated Starter Enclosure


380 to 480 volt standard, 24 VDC control voltage

UL, cUL Compliant Controls


BISSC Certified


ANSI and USDA Compliant


*Watershed® is a registered trademark of Hoffman Enclosures, Inc.

Optional Features

Select Series Single End Drive System

VerTech® Refrigeration Jacket

Provides superior overall strength, unparalleled ability to absorb dough force and excellent dough cooling capabilities

Bowl Tilt

Dual hydraulic cylinders for two-way tilt up to 110° forward and 45° reverse for manually adding ingredients

Butterfly Flour Gate Inlet

12″ (305 mm) diameter with BFM® connector**

Dust Vent with Filter

Liquid Inlets

2″ (50 mm) diameter bevel seat

Trough or Hopper Locks


NEMA 4X Stainless Steel Starter Enclosure


**BFM® fitting is a registered trademark of BFM Global, Ltd.

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