Applications
Sprockets Use special 10-tooth sprockets that engage with small rollers (Figure 5.7).
Specialized Sprocket
Figure 5.7 Specialized 10-Tooth Sprocket for Use with DOUBLE PLUS ® Chain
Selection and Handling (1) There are two types of DOUBLE PLUS ® base chain: with or without bushings. The bearing area on the type with bushings is larger, creating a contact surface between the pin and bushing. The bearing area on the type without bushings is limited to the contact surface between the side plate and the pin. Chain with bushings has much better wear characteristics. (2) The guide rail and bottom surface of the pallet should be smooth and straight in a DOUBLE PLUS Chain system for proper operation. Therefore, check and compare that the chain has a flexible construction that can accommodate irregularities. (3) Large and small rollers are available in different types of materials: standard, electroconductive, and high friction (for increased pallet acceleration). These specifications may be combined to suit your needs. (4) Aluminum extrusions are usually available through the manufacturer. If the weight on the pallets is very heavy, or you want to extend the working life of the system, steel rails should be used. (5) If you lubricate between the pins and bushings to reduce the noise and wear elongation, do not allow oil to get on the contacting surface of the large rollers and small rollers or on the outer surface of small rollers. If these parts are contaminated with oil, the pallets will not accelerate fast enough or they won’t reach the operating speed because of roller slip. You should buy prelubricated chains. (6) The rigidity of the chain depends on its structure. The greater the rigidity, the less likely that stick slip will occur (see Basics Section 2.3.5). If the conveyor is less than 15 m long, the possibility of stick slip is greatly reduced.
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