The double pitch roller chains for conveyor fall into two roller types: S-type (KCM Chain No. is suffixed with "0" ) and R-type (KCM Chain No. is suffixed with "2" ). Using a variety of standard attachments, the double pitch roller chain can be used as a compact, high-precision conveyor. Nickel plated models as well as stainless steel models are also available.
NOTES: - Connecting links for C2080 or larger models use split pins. - Sprockets: For S-roller type chains with teeth No. 29T (with 14 1/2 working teeth) or smaller, use the exclusively designed sprocket for double-pitch roller chains. For R-roller type chains, use the exclusively designed sprocket for R-roller type double pitch chains.

DL Type Double Pitch Roller Chain
DL type double pitch roller chain is another version of R type roller in which resin rollers are employed to reduce weight and travel noise. Nickel plated versions and stainless steel versions are also available. The DL type can be used with various attachments. Resin Roller (DL)
- Sprockets: For S-roller type cheins with teeth No. 29T (with 14 1/2 working teeth) or smaller, use the exclusively designed sprocket for double-pitch roller cheins. For R-roller type chains, use the exclusively designed sprocket for R-roller type double pitch chains.
The KCM F-type roller chains are standard roller chains using straight contour link plates, which are suitable for general power transmission, and conveying of materials placed directly on them.
· Sprockets: KCM standard sprocket can be used.
 Boss diameter must be reduced to avoid interference with link plate.
The roller chains fitted with high-precision attachments are best suited for compact conveyors with small pitches and high precision transferring capability.
These attachments are a widened version of the standard attachments, which are suitable for large slat and metal pieces. Wide Attachments WSA-1, WSA-2 Attachments WSK-1, WSK-2 Attachments

EP Attachments
These EP roller chain attachments are attachments with extra extended pins. Two roller chains with EP attachments are arranged in parallel so that their extended pins faced to each other to carry pipes, metal pieces, etc.
NOTES:  - KCM attachment chains are available in stainless steel in the same dimensions. Asterisk (*) implies bush diameter.


G Attachments
The G attachment is a link plate having a hole at midpoint. Two roller chains with G-type attachments are arranged wide in parallel, using pins or bars engaged in the midpoint holes. (NOTE: When used with the R-type roller chains, pay attention to the sprockets. )
The standard roller chain is fitted with side rollers for free flow to quickly carry or accumulate materials on them. Return line layout is also simple and compact. Side rollers made of steel, plastics, and rubber are available. Select them according to the kinds of transferred goods. 2P Both Side Type
Sprocket:   When KCM Standard "B Type' sprockes are used, side rolles may contact with or climb up on boss sprockets. Attertion to the bosses for KCM 40 with up to 23T, KCM with up to 13T, KCM 80 with 9T, 13T, and 15T, and KCM 100 with up to 13T.
R-type roller chains, made of standard steel, plastics, and rubber, are available, similar to side rollers. Select them according to the transferred goods and environmental conditions. 1P Alternate Side Type 2P Both Side Type
The roller chains are provided with raised carrying rollers at midpoint of chain pitch for quick carrying and accumulating of materials. Top rollers, made of steel, plastic, and rubber, are available. Top Roller Arrangement in Double Pitch
- Connecting links for the KCM80 or larger models use split pins.
- Connecting links for the C2080 or larger models use split pins.
This is a double-pitch chain fitted with attachment burred and tapped. The installation such as slats is easy.
Plastic top plates can be snapped on the roller chains to easily form slat conveyor. The SUC type can be bent to allow curved travel. NOTE: It is required to design the return portion, bearing in mind that the amount of back bend is limited.
The KCM lubrication-free chain uses special oil-impregnated bushing for self-lubrication, achieving maintenance-free. Use this chain when no lubrication is required or difficult lubrication in process is expected. - Nickel-plated chain and chains associated with various attachments are available. - Recommended chain speed: 150m/min or slower - Ordinary operating temperature range of -10°C to +150°C NL Double-Pitch Roller Chain
NOTES: - Connecting links of 2080NL are of split pin type.

NL Roller Chain
NL Oval Roller Chain
NOTE:  Connecting links of CBOFNL are of split pin type.
1. Lube-free. This eliminates contamination of oil from additional lubrication and contributes to a cleaner workplace.(*1) (*2) 2. Using lubricant NSF-H1 registration (which is possible to use in the place may touch foods accidentally),no problem for using for the food machines.Also produce SOS chain with bushes impregnated industrial lubricant. 3. Compatible with standard roller chains, and the installation of the standard attachment is possible. 4. Single and also multiple strand chain can use standard sprockets. 5. Available from low to high temperature(-20°C to +400°C ) environment. (*3) OPERATION TIME Note: ＊ 1. Please lubricate your chain before use, except when chains are to be used submerged in or in contact with water. : *2. Do not use under complete oil free condition. : *3. It is better to use between -10℃ to +150℃ for oil impregnated bushes performance. ※Dust in the bush accelerates wear.Wet or high temperature environments can cause the oil in the oil-impregnated bush to leak,decreasing wear resistance. COMPARISON OF WEAR ELONGATION BY OPERATION TIME LUBRICATION FREE STAINLESS STEEL CHAINS
LUBRICATION FREE STAINLESS STEEL DOUBLE PITCH CHAINS
These chains are fitted with parts all made of SUS304(18Cr-8Ni) austenite stainless steel for use in operating environment requiring high thermal resistance ( -20 to 400°C ), corrosion resistance, and cleanliness. NOTE: The KCM stainless steel roller chains have slight magnetic property as a result of cold manufacturing. Double-Pitch Chains

STRENGTHENED STAINLESS STEEL CHAINS (AS)
Pins and rollers of the AS chains are made of precipitation hardening stainless steel for increased allowable load, instead of those of the SS chains. Maximum allowable load is 1.5 times that of standard SS chain. If allowable load of SS chain is insufficient, please specify the AS chain. Corrosion resistance of the AS chain is slightly lower than that of the SS chain. Operating range is -20°C to +400°C . NOTE: The AS chain has magnetism of precipitation hardening stainless steel.
same as those of the $$ chain. - For offset link, only 2-pitch type is available. - A$ chains with attachments are available.
The side bow chain may be laterally curved for easily curved movement, using standard sprockets. Also, this chain can be used with attachments to form a curved conveyor, etc. Roller Chain Type
Double Pitch Chain Type S Roller Type
R Roller Type
This chain uses hollow pins to which various attachments can easily be fixed. Stainless steel version and surface treated version are available. Standard and double pitch sprockets are available.

Double Pitch Chain Type
$ Roller Type (bushed)
The carrier roller chain is fitted with large carrier rollers at pins to carry the loads, allowing more smooth and stable loading transferring than those of the roller chain with top rollers. Select a proper one of the rollers, made of steel and plastic, according to loading conditions.
Sprocket: Use the exclusively designed sprocket. Using the special roller structure, the roller chain speed is merely about 1/2.5 of the pallet speed, reducing operating noise which is suitable for the line requiring quiet operation. Also, this chain features excellent starting responsibility after accumulation, not given by general free flow chains, which is suitable for assembly line requiring repetitive starts and stops. Select roller materials according to loading conditions, similar to the carrier chain.
- For allowable load of the main roller, refer to page 54.
Sprocket: Use the exclusively designed sprocket.

Selection
Selection of small sized conveyor chains can be made in the following steps, except for some particular cases. (1) Preliminarily determining the type of conveyor chain (2) Confirming allowable load to rollers (3) Determining maximum tensile force acting on chain (4) Confirming conveying conditions (5) Determining the size of conveyor chain
Confirming Conveying conditions
(1) Type of conveyor chain (slat, top roller, carrier, etc.) (2) Conveying direction (horizontal, vertical, slope, etc.) (3) Weight and dimensions of material conveyed (4) Total amount of material conveyed, and frequency of conveying (5) Speed of conveyor (6) Length of conveyor (7) Lubrication (8) Operating conditions of conveyor, such as temperature and humidity
Preliminarily Determining the Type of Conveyor Chain
T (kgf) =Wt×f×K
T   : Maximum static tensile force acting to chain W τ : Weight of materials conveyed, except for chain (kgf) f    : Coefficient of friction (see Table 4) K   : Coefficient of speed (see Table 1) When two conveyor chains are arranged in parallel, temporarily determine the type and size of the conveyor chain of which maximum allowable tensile force is less than that determined by T × 0.6.

Confirming Allowable Load to Roller
Allowable load-carrying rollers of the conveyor chain shall not exceed those listed in Table 2 and Table 3.
Triple Speed Chain Roller Side Roller

Determining the Size of Conveyor Chain
Finally determine the size of the conveyor chain of which maximum allowable tensile force of conveyor chain satisfies the following formula, by calculating the product of the maximum tensile force (T) acting on the conveyor chain and the speed factor K (Table 1). T × K≤ Max. allowable tensile force of conveyor chain When two conveyor chains are arranged in parallel, the maximum tensile force acting on the chain is determined by T × 0.6.
■Symbols and Definitions (kgf) T  =Max. static tensile force acting on chain (m/min) V  = Conveying speed (chain speed) (m) C  =Center-to-center distance between sprockets W ＝Max. total weight of conveyed materials on conveyor (kgf) In case of separated materials: W= C/Conveying interval x Weight of conveyed material (kgf/piece) L,   =Length of conveying portion (m) (kgf/m) zv 1 =Weight of conveyed material on conveying portion L 2  =Length of accumulating portion (m) tv 2 ＝Weight of conveyed material on accumulating portion (kgf/m) m  =Weight of conveying portion, including chain (kgf/m) =Mechanical transmission efficiency for drive unit, kW: Required power η = Coefficient of friction between chain and rail when conveying (see Table 5) f, = Coefficient of friction between chain and conveyed material when accumulating (see Table 6) f2 =Coefficient of friction between chain and rail when accumulating (see Table 7) fa