ASTM F2645-21

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F2645 − 16 F2645 − 21 An American National Standard
Standard Specification for
Bun Slicing Machines
This standard is issued under the fixed designation F2645; 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.
1. Scope
1.1 This specification covers commercial, electrically operated, bun slicing machines.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 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.
2. Referenced Documents
2.1 ASTM Standards:
A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and
for General Applications
D3951 Practice for Commercial Packaging
F760 Specification for Food Service Equipment Manuals
F1166 Practice for Human Engineering Design for Marine Systems, Equipment, and Facilities
2.2 ANSI Standards:
Z1.4 Sampling Procedures and Tables for Inspection by Attributes
2.3 BISSC Standards:
ANSI/BISSC/Z50.2-2003 Sanitation Standard for the Design of Bakery Equipment
2.4 NEMA Standards:
MG 1 Motors and Generators
2.5 NSF/ANSI Standards:
NSF/ANSI No. 8 Commercial Powered Food Preparation Equipment
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.
Current edition approved Dec. 1, 2016Dec. 1, 2021. Published January 2017December 2021. Originally approved in 2007. Last previous edition approved in 20112016
as F2645 – 07 (2011).F2645 – 16. DOI: 10.1520/F2645-16.10.1520/F2645-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Available from Baking Industry Sanitation Standards Committee (BISSC), P.O. Box 3999, Manhattan, KS 66505-3999.
National Electrical Manufacturers Association (NEMA), 1300 North 17th St., Suite 1752, Rosslyn, VA 22209.
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2645 − 21
2.6 ANSI/UL Standards:
ANSI/UL 763 Motor-Operated Commercial Food Preparing Machines
ANSI/UL 969 Marking and Labeling Systems
2.7 Federal and Military Documents:
MIL-STD-1399/300 Interface Standard for Shipboard Systems Section 300A Electric Power, Alternating Current
MIL-STD-167/1 Mechanical Vibrations of Shipboard Equipment (Type I—Environmental and Type II—Internally Excited)
MIL-STD-461 Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment
3. Terminology
3.1 Definitions:
3.1.1 bun slicing machine, n—machine with a motor-driven knife for slicing buns and having a chute to position and feed the
whole bun by gravity for slicing; it may have a discharge table for holding the buns awaiting manual removal from the machine.
3.1.2 recovered materials, n—materials that have been collected or recovered from solid waste and reprocessed to become a source
of raw materials, as opposed to virgin raw materials.
4. Classification
4.1 General—Bun slicing machines covered by this specification are classified by type, class, size and style.
4.2 Type:
4.2.1 Type I—Bun slicing machine, electrically operated, single knife.
4.2.2 Type II—Bun slicing machine, electrically operated, dual knife.
4.2.3 Type III—Cluster-bun slicing machine, electrically operated, dual knife.
4.3 Class:
4.3.1 Class I—Fixed chute.
4.3.2 Class II—Adjustable chute.
4.3.3 Class III—Automatic/conveyor feed.
4.4 Size:
4.4.1 Size 1—Small; bun size up to 3-in. (76-mm) high by 4-in. (102-mm) wide.
4.4.2 Size II—Medium; bun size up to 3-in. (76-mm) high by 6-in. (152-mm) wide.
4.4.3 Size III—Large; bun size up to 3-in. (76-mm) high by 9 ⁄4-in. (229-mm) wide.
4.4.4 This specification does not purport to address all of the sizes that may be available, but it does provide an overview of the
most common sizes used in the industry today.
4.5 Style:
4.5.1 Style I—Counter top or bench–mounted.
4.5.2 Style II—Floor–mounted.
Available from COMM 2000, 1414 Brook Drive, Downers Grove, IL 60515.
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
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4.5.3 Style III—Portable.
5. Ordering Information
5.1 Ordering Data—Purchasers shall select the bun slicing machine and any preferred options and include the following
information in the purchasing document:
5.1.1 Title, number, and date of this specification.
5.1.2 Type, class, size and style of machine required.
5.1.3 Quantity to be furnished.
5.1.4 Electrical Power Supply Characteristics—Voltage, phase, frequency (see 7.2.1).
5.1.5 Accessory equipment, options, spare parts, and maintenance parts required,
5.1.6 When Federal/Military procurement is required, review and implement the applicable supplementary requirements (see
Supplementary Requirements S1–S8).
5.1.7 When specified, the purchaser shall be furnished certification that samples representing each lot have been either tested or
inspected as directed in this specification and the requirements have been met. When specified, a copy of the test results shall be
furnished.
5.1.8 Level of preservation and packing required if other than as stated in Practice D3951 (see Section 18).
5.1.9 Labeling requirements (if different than Section 16).
5.1.10 Whether the equipment meets the requirements of NSF/ANSI, ANSI/UL, or BISSC standards, or a combination thereof.
6. Material
6.1 General—Materials used in the construction of bun slicing machines shall comply with the applicable requirements of
NSF/ANSI No. 8 or ANSI/BISSC/Z50.2-2003, Parts 1 and 4.13, or both. Materials used shall be free from defects that would affect
the performance or maintainability of individual components or of the overall assembly. Materials not specified herein shall be of
the same quality used for the intended purpose in commercial practice. None of the above shall be interpreted to mean that the
use of used or rebuilt products are allowed under this specification unless otherwise specified.
7. Design and Construction
7.1 General—Bun slicing machines shall be delivered assembled, ready for mounting, connection to electricity, and use as
applicable. The bun slicing machine shall be simple to disassemble and reassemble without special tools or equipment. It shall meet
the then current requirements of NSF/ANSI No. 8, ANSI/BISSC/Z50.2-2003, Parts 4.13 and 4.28, or ANSI/UL 763, or a
combination thereof.
7.1.1 The bun slicing machine shall consist of a feeding chute tilted at a 20 to 35° vertical angle with the machine base and a
circular cutting knife or knives rotated by an electric motor or motors. The feed chute may have adjustments for bun width and
height, and thickness and depth of cut. If so, the chute interior width shall be infinitely adjustable from a lower limit of no more
1 1
than 1 ⁄4 in. (31.8 mm) to an upper limit of no less than 4 ⁄2 in. (114 mm). The cutting knife height shall be infinitely adjustable
1 15
from a lower limit of no more than ⁄2 in. (12.7 mm) above the base of the chute to an upper limit of no less than ⁄16 in. (24 mm)
above the base of the chute. Class I and III bun slicing machines shall be provided with 4 non-skid feet, and shall have envelope
dimensions no greater than 24 in. (610 mm) wide, 34 in. (864 mm) deep, and 31 in. (787 mm) high. No tools or excessive force
shall be required to make adjustments on the bun slicing, and during adjustment, there shall be no binding or jamming of moving
parts. The bun slicing machine shall be capable of slicing both soft and hard buns and rolls without jamming or stalling, and
without tearing or crushing the buns or rolls. When the machine is operating, the cutting knife shall rotate such that, within the
chute, the cutting edge travels away from the bun inlet. The cutting teeth or serrations, as applicable, shall have cutting edges facing
the same direction as the blade travel.
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7.1.2 Compliance with NSF/ANSI No. 8—Acceptable evidence of meeting the requirements of NSF/ANSI No. 8 shall be the NSF
certification mark on the bun slicing machine and listing in the current edition of the NSF Official Listing of Food Service
Equipment, a certified test report from a recognized independent testing laboratory acceptable to the user, or a certificate issued
by NSF under its special one time contract evaluation/certification service.
7.1.3 Compliance with ANSI/BISSC/Z50.2-2003, Parts 4.13 and 4.28—Acceptable evidence of meeting the requirements of
ANSI/BISSC/Z50.2-2003, Parts 4.13 and 4.28 shall be a photocopy of the current BISSC certificate of authorization for the bun
slicing machine or a certified test report from a recognized, independent testing laboratory acceptable to the user.
7.1.4 Compliance with ANSI/UL 763—Acceptable evidence of meeting the requirements of ANSI/UL 763 shall be a UL Listing
mark on the bun slicing machine, or a certified test report from a recognized, independent testing laboratory acceptable to the user.
7.2 Electrical Requirements:
7.2.1 Power Supply—The bun slicing machine shall be furnished with a 6-ft (1.83-m) minimum length cord and plug with ground
or shall be double-insulated. The cord and plug shall be sized for and be the appropriate configuration for the specified electrical
characteristics.
7.2.2 Motor—Electric motors used on the bun slicing machines be of the continuous duty type and shall conform to NEMA MG
1 and ANSI/BISSC/Z50.2-2003, Part 4.29. The motor shall be of sufficient horsepower and speed to meet the production capacity.
7.3 Motor Controller—The motor shall be controlled by an ON-OFF switch accessible to the operator. The switch shall either be
provided with a guard or located to help prevent accidental actuation.
7.4 Cutting Knife—The cutting knife shall either be hardened, carbon steel or stainless steel. Stainless steel knives shall conform
to Specification A240/A240M and heat treated so that the hardness of the cutting blade, measured within ⁄4 in. (6.4 mm) of the
cutting edge, shall be not less than 50 nor more than 60 on the Rockwell C scale.
8. Performance Requirements
8.1 When tested in accordance with Section 11, the bun slicing machine shall operate without failure of the major functional
components.
9. Workmanship, Finish, and Appearance
9.1 All components and assemblies of the dough divider and rounder shall be free from dirt and other extraneous materials, burrs,
slivers, tool and grind marks, dents, and cracks. Castings, molded parts and stampings shall be free of voids, sand pits, blow holes,
and sprues. External surfaces shall be free from kinks, dents, and other deformities. Forming and welding shall not cause damage
to the metal and shall be done neatly and accurately.
10. Sampling
10.1 A representative production model shall be selected for performance testing.
10.2 When specified in the contract or purchase order, sampling for inspection shall be performed in accordance with ANSI Z1.4.
11. Test Methods
11.1 Operational Test—The bun slicing machine shall be operated, without a load, and meet
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