{{requestButtons}}
Catalog excerpts
Z.M.C. Italia . Via Portoni, 290/D - 21044 CAVARIA (Va) Tel. +39.0331.217476 - Telefax +39.0331.218204 Internet: www.zmc - E-mail: zmc@zmc.it
Z.M.C. Italia ••••—declines all responsability for any errors in the issue of this catalogue and reserves the right to make any alterations to drawings and technical details without notification. This catalogue cancels and replaces all previous issues. The copying of technical drawings, text or images is expressly forbidden under copyright.
A COMPANY CONTINUALLY EVOLVING.
A "continuing evolution" best describes the development of ZMC. From the original ideas of the founders, Angelo Zibetti, Mario Mattiolo and Angelo Croci, in 1954, the company has evolved new ideas and manufacturing processes that continue to drive the company forward. This continuing evolution of modern manufacturing techniques and ideas, has seen ZMC acknowledged both in Italy and across the International industrial market as one of the most advanced conveyor chain manufacturers in the world. The Factory, in Cavaria, Italy, is one of the largest and most up to date chain production...
ZMC is a solid, modern organised company that is continually evolving. The planning procedures and production processes assure quality and consistency across the whole product range. The vast stock of semi-finished and finished chains, the technical back up of a large commercial organisation along with experienced, technically qualified agents throughout Europe and the World, ensures a quality and service that is second to none. The combination of these factors makes ZMC a company that is dedicated to 'customer satisfaction’.
ENGINEERING DATA CONVERSION FACTORS NON STANDARD METRIC PITCH CHAINS page 2.1.1 BRITISH STANDARD CHAINS, BS 4116 PART 4 (Z SERIES) page 3.1.1 METRIC CHAINS, ISO 1977 – DIN 8167 (M SERIES) page 4.1.1 METRIC CHAINS, DIN 8165 (C SERIES) page 5.1.1 ANSI STANDARD CHAINS page 6.1.1 CHAINS FOR SPECIAL APPLICATIONS page 7.1.1 FOOD INDUSTRY AUTOMOTIVE INDUSTRY SHOE INDUSTRY PAPER INDUSTRY PROVER INDUSTRY CANNING INDUSTRY FOOD OVEN INDUSTRY BOTTLE WASHING INDUSTRY BRICK INDUSTRY AGRICULTURAL MACHINES page 7.1.2 page 7.2.2 page 7.8.1 page 7.8.2 page 7.10.1 page 7.10.2 page 7.12.1 page 7.13.2 page...
ENGINEERING DATA
CHAIN SELECTION - GENERAL CONSIDERATION In order to ensure a correct approach to the selection of conveyor chains, the following points should be considered: 1) TYPE OF CONVEYOR 2) TOTAL LOAD TO BE CARRIED 3) CHAIN SPEED 4) CHAIN PITCH 5) TYPE OF ATTACHMENT 6) OPERATING CONDITIONS 7) LUBRICATION 8) CHAIN BREAKING LOAD 1) TYPE OF CONVEYOR Conveyor chains are classified in two categories: a) sliding b) rolling These two categories are further subdivided into conveyors that are: a) horizontal, b) inclined, c) vertical, d) combination. 2) TOTAL LOAD TO BE CARRIED This is the weight of the...
The maximum recommended speed for conveyor chains is 60 metres per minute with an ideal speed range between 0 and 30 m/min. Chain speed contributes greatly towards the condition known as Hunting or Surging. Hunting (or Surging) is defined by irregular chain speed, a series of fast and slow chain surges. This condition can seriously compromise the functionality of a chain conveyor, the main factors that can contribute to this effect are outlined as follows: • The polygonal effect, due to the gearing of the chain with sprockets, (shown in in Fig. 2) can cause a small amount of chain surge....
This is the distance expressed in millimetres or inches between two consecutive pin centres of the chain and is determined by the following conveyor characteristics: b) diameter of drive and driven wheels c) conveyor load distribution d) spacing of attachments / carriers (i.e. slats, swing trays, crossbars, fasteners, etc). 5) CHAIN ATTACHMENTS Slats / carriers are attached to the chain by means of angle iron sections welded to the chain plates or they may be extensions of the chain plates. Chain attachments are defined by the dimensions, shape, number per linear metre, and the type of...
Chain pull is that force required to move the chain, the connected mechanical parts and the load to be conveyed. The chain pull required for a particular application is dependent on the following factors: 1) WEIGHT OF MATERIAL CARRIED 2) WEIGHT OF CHAINS AND SUPPORT ELEMENTS (SLATS, SWING TRAYS, CROSSBARS, FASTENERS, ETC.) 5) GEARING FACTOR The calculation for chain pull is carried out in two phases: - the preliminary phase, a calculation which determines the type of chain required by the chain weight and the coefficient of friction. - the second phase, a control calculation, confirms the...
To obtain the total FS coefficient, (FS) value for each operational condition must be multiplied together. 5) GEARING FACTOR = FA This is an adjustment coefficient made to the chain pull, which increases due to the additional friction caused by the rotation of the chain on the drive and driven wheels. FA = 1,05 for wheels mounted on brass bushes = 1,03 for wheels mounted on bearings The sum of all products obtained by multiplying FA for the chain pull in each gearing point determines the new total chain pull. For the following examples the "FA" values will not be considered.
CHAIN PULL CALCULATIONS (T) a) Horizontal conveyor with sliding chains b) Horizontal conveyor with roller chains c) Inclined conveyor with sliding chains
d) Inclined conveyor with roller chains T = 9,81 [cosα (P+P1) • fv + sinα • P1] • FS [N] No. of chains Fig. 7 T = 9,81 (P/2+P) • FS [N] No. of chains N.B.: For further technical assistance on vertical conveyors not covered in this catalogue, please contact our technical office
SCRAPER CONVEYORS To calculate the chain pull of scraper conveyors, additional parameters need to be considered: coefficient of friction between material to be moved and the side guides (table 5), portion of loaded conveyor [m], mass of product to be transported [Tonnes/h], height of side guide [m], width between guides [m], product depth normally not exceed 50-60 % of H, 3 specific weight of material conveyed. [Tonnes/m ] (table 5), chain speed. [m/sec]. ** indicative values a) Horizontal conveyor with sliding chains and material Where P1 can be calculated as follows: a) P1 = H .B • L • p...
