ASTM F952-12(2023)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F952 − 12 (Reapproved 2023) An American National Standard
Standard Specification for
Mixing Machines, Food, Electric
This standard is issued under the fixed designation F952; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope F760 Specification for Food Service Equipment Manuals
F1166 Practice for Human Engineering Design for Marine
1.1 This specification covers vertical electric food mixing
Systems, Equipment, and Facilities
machines in the size range (as expressed by bowl capacity)
from 5 to 140 qt. These machines shall be adaptable for 2.2 NSF/ANSI Standards:
NSF/ANSI No. 2 Food Equipment
mixing, whipping, and beating food products. This specifica-
tion does not include special purpose machines that are NSF/ANSI No. 8 Commercial Powered Food Preparation
Equipment
intended solely for mixing dough.
2.3 Underwriters Laboratories Standards:
1.2 This specification also covers optional construction
ANSI/UL 763 Motor-Operated Commercial Food Preparing
features and attachments that enhance the mixing, beating, or
Machines
whipping capabilities of the machine. This specification does
ANSI/UL 969 Marking and Labeling Systems
not cover ancillary equipment that can be driven by the
attachment hub.
2.4 ANSI Standards:
ANSI Z1.4 Sampling Procedures and Tables for Inspection
1.3 The values stated in inch-pound units are to be regarded
by Attributes
as standard. The values given in parentheses are mathematical
ANSI S1.13 Methods for Measurement of Sound Pressure
conversions to SI units that are provided for information only
Levels
and are not considered standard.
2.5 Military Standards:
1.4 The following precautionary caveat pertains only to the
MIL-STD-1399/300 Interface Standard for Shipboard
test methods portion, Section 9, of this specification. This
Systems, Section 300A, Electric Power, Alternating Cur-
standard does not purport to address all of the safety concerns,
rent
if any, associated with its use. It is the responsibility of the user
MIL-STD-167/1 Mechanical Vibration of Shipboard Equip-
of this standard to establish appropriate safety, health, and
ment (Type I—Environmental and Type II—Internally
environmental practices and determine the applicability of
Excited)
regulatory limitations prior to use.
MIL-STD-461 Requirements for the Control of Electromag-
1.5 This international standard was developed in accor-
netic Interference Characteristics of Subsystems and
dance with internationally recognized principles on standard-
Equipment
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3. Terminology
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.1 Definitions of Terms Specific to This Standard:
3.1.1 agitators, n—these devices attach to the vertical shaft
2. Referenced Documents
that protrudes downward from the mixer and converts the
2.1 ASTM Standards:
planetary rotation into the desired action on the foodstuffs
D3951 Practice for Commercial Packaging
within the bowl.
This specification is under the jurisdiction of ASTM Committee F26 on Food
Service Equipment and is the direct responsibility of Subcommittee F26.04 on
Mechanical Preparation Equipment. Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann
Current edition approved Jan. 1, 2023. Published February 2023. Originally Arbor, MI 48113-0140, http://www.nsf.org.
approved in 1985. Last previous edition approved in 2017 as F952 – 12 (2017). Available from comm2000, 1414 Brook Dr., Downers Grove, IL 60515.
DOI: 10.1520/F0952-12R23. Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4th Floor, New York, NY 10036, http://www.ansi.org.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F952 − 12 (2023)
3.1.2 attachment hub, n—the device that locks ancillary 6. Physical Requirements
devices, such as a vegetable slicer or a chopping end, into an
6.1 Design and Manufacture—The mixer shall meet the
industry standard #12 tapered hub (#10 tapered hub for Size 5
then current applicable requirements of NSF/ANSI No. 8 and
machines) and provides a rotating square drive. This is
ANSI/UL 763. Accessories, such as agitators, bowl trucks,
mounted above the bowl on the front of the mixer.
bowls, tables, extensions, adapters, splash covers, and storage
3.1.3 bowl guard, n—the barrier, assembled over the bowl
stands shall meet the applicable requirements of NSF/ANSI
area, intended to reduce the user’s access to the hazards that
No. 2 or NSF/ANSI No. 8 at the time of purchase. Optional
exist in the bowl during machine operation.
accessories, component parts, assemblies, and spare parts shall
be identical to the extent necessary to insure interchangeability
4. Classification
between mixers.
6.1.1 Compliance with NSF/ANSI No. 8—Acceptable evi-
4.1 Food mixers covered in this specification are the fol-
dence of the mixer meeting the requirements of NSF/ANSI No.
lowing types:
8 shall be the NSF listing mark on the finished product and
4.1.1 Type I, bench-mounted mixer:
listing in the manufacturer’s product listings on the NSF
Bowl Agitator r/min
Motor Horse-
website, nsf.org, or a certified test report from a recognized
Capacity, Lowest Highest
Size power Rating,
qt, Speed, Speed, independent testing laboratory acceptable to the user, or a
min
min/max less than greater than
certificate issued by NSF under its special one time contract
1 evaluation/certification service.
5 5/7 150 500 ⁄6
12 12/15 120 300 ⁄3 6.1.2 Compliance with ANSI/UL 763—Acceptable evidence
20 20/25 120 300 ⁄2
of meeting the requirements of ANSI/UL 763 shall be a UL
4.1.2 Type II, floor-mounted mixer:
Listing mark on the mixer, or a certified test report from a
recognized independent testing laboratory acceptable to the
Bowl Agitator r/min
Motor Horse-
Capacity, Highest
user.
Size power Rating,
qt, Lowest Speed, Speed,
min
min/max less than greater than
6.2 Drive Mechanism—The mixer shall be driven by an
electric motor, through a reduction system, to the planetary/
20 20/25 120 300 ⁄2
3 beater shaft system. The entire drive system shall be enclosed
30 30/36 100 300 ⁄4
40 40/45 100 300 1 ⁄4
within the mixer itself. All constituent active parts within the
60 60/70 80 280 1 ⁄2
drive system shall be replaceable. All mixers shall be equipped
80 80/90 80 280 3
with an internal clutch, shock absorber, or belt drive to
140 140/160 55 260 5
minimize the shock of starting or shifting gears of the mixer.
4.1.3 Classes:
Size 60 and larger gear drive speed selection mixers shall either
4.1.3.1 Class 1—Painted finish.
be equipped with a shift interlock switch that will automati-
4.1.3.2 Class 2—Nonpainted finish. All nonwearing sur-
cally disconnect power to the main drive motor if the operator
faces to be either polished aluminum, plated carbon steel, or
attempts to shift speeds without first shutting off the motor or
stainless steel.
be designed to permit speed changes during operation.
6.3 Speed Selector—A speed selector shall be provided to
5. Ordering Information
change agitator speed. Either continuously variable or discrete
5.1 Purchasers should select the mixer and any preferred
speed selection is acceptable. A means to provide the user with
options and include the following information in the purchas-
reference marks for speed repeatability is required. In no case
ing document:
shall less than three distinct speeds be available on gear box
5.1.1 Title, number, and date of this specification,
equipped mixers or three distinct markings be available on
5.1.2 Type, size, and class of mixer required (see 4.1),
continuously variable transmissions.
5.1.3 Electrical power supply characteristics; voltage,
6.4 Beater Shaft—The beater shaft shall be vertically
phase, frequency (see 6.5 and 6.7),
mounted and shall be held securely in place. Agitators shall fit
5.1.4 Bowls, agitators, accessory equipment, options, mixer
securely and shall be capable of being removed or replaced
guard, spare parts, and maintenance parts required,
without tools. The beater shaft shall be connected to planetary
5.1.5 Labeling requirements (if different than Section 13),
gearing to provide two separate rotating motions of the agitator
5.1.6 Quantity of mixers to be furnished, and
simultaneously.
5.1.7 Any special requirements or deviations from this
specification. 6.5 Motor(s)—Minimum horsepower rating for the main
5.1.8 When Federal/Military procurement is required, re-
drive motor of the mixer shall meet the requirements of 4.1.1
view and implement the applicable supplementary require- or 4.1.2, as appropriate. If an auxiliary motor is used to perform
ments (see S1 through S9).
another function (such as, bowl lifts), it shall be internally
5.1.9 When specified, the purchaser shall be furnished interconnected within the mixer to provide a single electrical
certification that samples representing each lot have been either point connection. Size 5 through 30 mixers shall be available
tested or inspected as directed in this specification and the for operation on a 120/60/1 line. Size 60 and larger mixers shall
requirements have been met. When specified, a copy of the test be available for operation on a 208/60/3 line. Other voltage
results shall be furnished. availabilities are at the discretion of the manufacturer. Mixers
F952 − 12 (2023)
with three phase motors shall be provided with a plate, label, or 6.14 Attachment Hub—Size 60 and smaller mixers shall be
decal showing the direction of rotation. In all cases, the main provided with an attachment hub for operating vegetable and
drive motor shall be rated for continuous duty. cheese slicing, meat chopping, dicing, or equivalent attach-
ments. This attachment hub shall be capable of at least 350
6.6 Power Supply—The mixer may either be provided with
rpm. This requirement can be met by the manufacturer with an
a power supply cord or designed for permanent electrical
ancillary speed increaser attachment of aluminum construction.
connection. Power supply cords shall be a minimum 5-ft
(1.52-m) length and provided with a grounding type attach-
6.15 Bowl Truck—Type II mixers shall have optionally
ment plug. Mixer housings designed for permanent electrical available a bowl truck whose use is compatible with the base
connection shall be provided with an appropriate hole sized for
design of the mixer. The bowl truck shall be durably con-
conduit connection. structed and designed to hold the bowl above the point of
attachment to the bowl support when the support is at its lowest
6.7 Electrical Specifications—Nominal electrical specifica-
position.
tions are as follows: 120/60/1, 208/60/1, 240/60/1, 208/60/3,
240/60/3, and 480/60/3.
6.16 Other Optional Equipment:
6.16.1 Mixing Bowl Extension—Shall be optionally avail-
6.8 Mixing Bowls—Bowls shall meet the requirements of
able for size 60 and 80 mixers and made of the same material
NSF/ANSI No. 8. Bowl requirements should be stated in the
as the bowl.
purchasing document. The bowl shall be equipped with two
6.16.2 Bowl Adapters—Size 20 and larger mixers shall be
handles. If the bowl is metallic, the minimum wall thickness
optionally available with bowl adapters to use the next smaller
for bowls of 60-qt (56.8-L) capacity or less is 0.0625 in. (1.6
size bowl and agitators.
mm). For bowls of larger than 60-qt (56.8-L) capacity, the
6.16.3 Splash Covers—Shall be optionally available for size
minimum metallic thickness is 0.0781 in. (2 mm). The mini-
60 and larger mixers.
mum thickness at any point of the bowl after forming shall be
no less than 0.050 in. (1.27 mm) for bowls of 60 qt (56.8 L) or 6.16.4 Table—Shall be optionally available for Type I, Size
less capacity and not less than 0.062 in. (1.58 mm) for bowls 20. When specified, the table shall be 24 in. (610 mm) high
over 60-qt (56.8-L) capacity. All bowls shall be equipped with with a horizontal surface of 30 by 24 in. (762 by 610 mm). A
a durable metallic means of attachment to the bowl yoke. full-size shelf under the top surface shall be provided for
Bowls of 60-qt (56.8-L) capacity or greater shall be reinforced ancillary equipment storage. It shall be of stainless steel
at the points of attachment to the bowl yoke. Bowls of construction, able to support a load of 250 lb (113.4 kg).
nonmetallic construction shall have equivalent durability to
6.17 Lubrication—All wearing parts of the mixer shall be
metallic bowls. Metal bowls shall be made from stainless steel.
provided with a means for lubrication or be permanently
6.9 Agitators—Mixers meeting this specification must be
lubricated and sealed. Oil seals shall contain the lubricant. Gear
available with batter beater, sweet dough beater, dough hook, housings shall have provisions for lubrication and shall allow
pastry knife, wing whip, and wire whip suitable for use with
lubricant to circulate around gears if applicable.
the bowl size(s) specified. Stainless steel must be used on the
6.18 Finishing—All exterior surfaces of the mixer and
wires of whips.
attachments described within this specification shall be finished
6.10 Bowl Lift—The mixer shall be provided with a mecha-
to the requirements of NSF/ANSI No. 8.
nism for raising and lowering the bowl. Mixers of 60-qt
6.19 Workmanship—All components and assemblies of the
(56.8-L) capacity or more shall be equipped with a powered
mixer shall be free of dirt and other extraneous materials, burrs,
bowl lift. Size 40 and smaller mixers shall have a manually
slivers, tool and grind marks, dents, and cracks. Castings,
operated lift mechanism with a positive stop at the extremities
molded parts, and stampings shall be free of voids, sand pits,
of the travel. In all cases, a stop shall be provided to prevent the
blow holes, and sprues. External surfaces shall be free of sharp
agitator from contacting the bowl when proper bowls and
edges and corners. All sheet metals used in the fabrication of
agitators are used together.
the mixing machine shall be free from kinks and unspecified
6.11 Bowl Support—The bowl support shall have three lug
dents. Forming and welding shall not cause damage to the
positions matching lugs on the bowl. All mixers shall have a
metal and shall be done neatly and accurately. Corners shall be
positive bowl locking mechanism to prevent bowl motion
square and true and all bends of a major nature shall be of
under heavy loads.
uniform size and shape.
6.12 Base—The base shall be constructed of materials that
6.20 Hazard Protection:
are consistent with the need for rigidity and durability. For Size
6.20.1 The mixer shall meet the requirements of ANSI/UL
12 and larger machines, means shall be provided for bolting the
763.
mixer to a stand (Type I) or to the
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