Double Sigma Arm Mixer with Triple Sweep Agitator - Open Frame Hybrid Design

Double Sigma Arm Mixers

Shaffer® Double Sigma Arm Mixers are ideal for wire cut cookies, granola and health bars, muffin batters, pretzels, cream fillings, icings, and confectionery creams. The mixer is available in open or enclosed frame designs and is engineered to meet your bakery’s specific needs.

Usable Bowl Volume
Rated Bowl Volume
900 lb / 408 kg
20.4 cu ft / 577 L
17.3 cu ft / 490 L
1100 lb / 499 kg
24.2 cu ft / 685 L
20.6 cu ft / 582 L
1500 lb / 680 kg
32.6 cu ft / 923 L
29.9 cu ft / 847 L
1800 lb / 816 kg
39.1 cu ft / 1107 L
35.9 cu ft / 1016 L
2100 lb / 953 kg
47.8 cu ft / 1353 L
38.9 cu ft / 1101 L
2400 lb / 1089 kg
53.3 cu ft / 1509 L
43.4 cu ft / 1228 L
2700 lb / 1225 kg
61.0 cu ft / 1727 L
51.9 cu ft / 1469 L
3300 lb / 1497 kg
72.6 cu ft / 2055 L
61.7 cu ft / 1748 L
4000 lb / 1996 kg
94.9 cu ft / 2688 L
88.6 cu ft / 2509 L
5400 lb / 2449 kg
122.0 cu ft / 3455 L
106.7 cu ft / 3020 L



Enclosed Frame Design

Features a single end belt drive system and watertight enclosures for the drive and hydraulic systems

Open Frame Design

Features our energy efficient direct drive system and either a frame-mounted, remote-mounted or watertight enclosed hydraulic tilt system

Two Heavy Duty Stainless Steel Sigma Arm Agitators

Available in standard double sweep, W-style double sweep or Triple Sweep agitator (patent pending) to meet your exact product needs

Stainless Steel Product Zone

Bowl, agitator and canopy

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

(Patent Pending)


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

Hydraulic Bowl Tilt Systems

With jog and tilt using single or dual hydraulic cylinders for forward tilt up to 140° or two-way tilt up to 140° forward and 95° reverse

Bowl Mounting Bearing

Bowl tilts on a laminate composite bearing

Heavy Duty Stainless Steel Canopy

Butterfly gate, liquid inlets, and flour dust vent

Watershed® Operator Panel Enclosure

Touch screen operator interface, PLC controls, and push buttons with universal labels for frequently used functions*

Grout Kit

Anchor bolts and grout for sanitary mixer installation

NEMA 4 Painted Starter Enclosure


UL, cUL Compliant Controls


BISSC Certified


ANSI, USDA and CE Compliant

Optional Features



Over tilt and two-way tilt operation


Sanitary bowl drain


Refrigeration jacket

Flour Gate

Sliding flour gate in lieu of butterfly valve

Flour Gate Adapter

BFM® flour gate adapter and dust vent**

Ingredient Door

Ingredient door in canopy


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

Agitator Shaft Seals

Lip seal style agitator shaft seals

Custom Interface & PLC

Custom operator interface and PLC packages


NEMA 4 X stainless steel starter enclosure


Grace port 120 VAC outlet and Ethernet port in electrical enclosure door


Non-contact voltage detector and voltage indicator in electrical enclosure door


ARC Flash Box

Main circuit breaker ARC flash box