U.S.Tsubaki Double Plus Chain
For Free Flow Conveying and Accumulating Applications
Cutaway view of DOUBLE PLUS® roller
DOUBLE PLUS Chain uses free flow technology to revolutionize your operation. The secret is in the construction.
DOUBLE PLUS consists of a series of rollers: a large center roller and two small outer rollers. Rollers can be made of engineered plastic for low-maintenance, low-noise operations or steel for heavy-duty applications.
Faster pallet speed can mean savings. You can use slower chain speeds and smaller motors, yet get the same — or faster — output. Chains last longer and you can reduce operating costs. DOUBLE PLUS lets you maintain or even increase production while lowering costs.
Friction between the large roller and the small rollers allows them to turn in unison. The difference in roller diameters results in the End view of DOUBLE PLUS® system conveyed object moving about 2.5 times FASTER than the speed of the chain. That means you get increased output without increasing the speed of your chain.
The large roller supports the pallet. The small rollers rotate on the guide rail and provide rolling friction. They keep the chain moving even when pallets are accumulating. Smooth accumulation protects product on line.
DOUBLE PLUS® is a system of parts that come together to maximize efficiency at your operation. The system includes:
• Revolutionary DOUBLE PLUS Chain (see pages 4 and 6)
• Special 10-tooth sprockets — a unique geometry available for sizes 3/4” to 2” (see page 5). This unique geometry is also available for Engineering Class DOUBLE PLUS Chain in 6-or 8-tooth sprockets (see page 7)
• Plastic return guides — help maintain low noise levels and ensure a smooth transition (see page 8)
• Brackets — allow convenient installation of plastic return guides (see page 9)
• Anodized aluminum guide rail with optional steel rail inserts (see page 10)
• Pallet guide rails — protect your products by keeping them securely on the system (see page 11)
The chain can be constructed from three different types of materials. Choose carbon steel for general purpose applications, stainless steel when corrosion resistance is required, or hard chrome plated when you want the strength of carbon steel with light corrosion resistance. For larger applications (over 840 lbs. of tension and 270 lbs.
DOUBLE PLUS® with plastic rollers is available in 3/4" pitch to 2" pitch. DOUBLE PLUS with steel rollers is available in 3/4" pitch to 7-7/8" pitch.
Select the type of rollers that will work best for your operation.
B series is made of high-friction plastic for quick startup, discharges electrostatic buildup, and standard applications.
D series and discharge of electrostatic buildup. Urethane rollers are available on a specialty basis to prevent scratching of sensitive products when conveying without pallets. Consult your U.S. T Engineer for more details.
A B C D SERIES: Color: Feature: Color: Feature: Color: Feature: Color: Feature: SIZE OF ROLLER: SMALL LARGE Gray Brown Standard Standard Off-White Brown High friction plastic Standard Gray Black Standard Electroconductive Plastic Off-White Black High friction plastic Electroconductive Plastic Maximum Allowable Tension Quick Start-up Volume Resistivity of 106 . x cm Quick Start-up AND Volume Resistivity of 106 . x cm SERIES BENEFITS:
DOUBLE PLUS with snap covers is also available. Snap covers prevent small parts from falling into the line and jamming the conveyor.
Contact U.S. Tsubaki for additional information on selecting the right system for your operation.
STANDARD DOUBLE PLUS® WITH SNAP COVERS
•
These base chains are specialized for SNAP COVERS.
•
The SNAP COVERS cannot be attached to the standard type of DOUBLE PLUS chain.
•
Offset links are not available for DOUBLE PLUS with SNAP COVERS.
DOUBLE PLUS® CHAIN
STANDARD
A unique geometry available for sizes 3/4" to 2" pitch.
Sprockets for DOUBLE PLUS® CHAIN
(For Double Pitch “VR,” “VRP,” “VR-SC,” & “VRP-SC”)
C2030VRP-10T-SC B 10 2.427 2.480 0.118 0.500 1.457 0.984 0.602 0.44
(61.65) (63) (3.0) (12.7) (37) (25) (15.3) (0.2)
C2040VRP-10T-SC B 10 3.236 3.346 0.157 0.630 2.047 1.575 0.803 1.76
(82.20) (85) (4.0) (16) (52) (40) (20.4) (0.8)
C2050VRP-10T-SC B 10 4.045 4.213 0.197 0.630 2.598 1.772 1.004 3.31
(102.75) (107) (5.0) (16) (66) (45) (25.5) (1.5)
C2060VRP-10T-SC B 10 4.854 5.039 0.236 0.748 3.189 1.969 1.201 5.52
(123.30) (128) (6.0) (19) (81) (50) (30.5) (2.5)
C2080VRP-10T-SC B 10 6.472 6.772 0.472 0.906 4.331 2.638 1.870 15.4
(164.39) (172) (12.0) (23) (110) (67) (47.5) (7.0)
ENGINEERING CLASS
Engineering Class DOUBLE PLUS® CHAIN
RF03075VR 2.953 3.16
(75) 1.252 1.654 0.472 0.335 1.181 0.126 0.866 0.315 2.028 0.965 1.063 1.453 0.571 (4.7)
RF03100VR 3.937 (31.8) (42.0) (12) (8.5) (30) (3.2) (22.0) (8.00) (51.5) (24.5) (27.0) (36.9) (14.5) 2.69
(100) (4.0)
RF05100VR 3.937 5.38
(100) 1.575 2.087 0.630 0.433 1.535 0.177 1.260 0.446 2.776 1.319 1.457 1.831 0.728 (8.0)
RF05150VR 5.906 (40.0) (53.0) (16) (11.0) (39) (4.5) (32.0) (11.32) (70.5) (33.5) (37.0) (46.5) (18.5) 4.03
(150) (6.0)
RF10150VR 5.906 2.000 2.638 0.787 0.551 2.126 0.248 1.500 0.571 3.661 1.772 1.890 2.319 0.984 8.06
(150) (50.8) (67.0) (20) (14.0) (54) (6.3) (38.1) (14.50) (93.0) (45.0) (48.0) (58.9) (25.0) (12)
RF6025VR 6.000 12.1
(152.4) 2.252 2.972 0.866 0.630 2.441 0.311 1.752 0.626 4.272 2.087 2.185 2.610 1.102 (18)
RF12200VR 7.874 (57.2) (75.5) (22) (16.0) (62) (7.9) (44.5) (15.90) (108.5) (53.0) (55.5) (66.3) (28.0) 10.1
(200) (15)
RF17200VR 7.874 2.559 3.386 0.984 0.709 2.717 0.374 2.000 0.752 5.000 2.382 2.618 2.972 1.220 13.4
(200) (65.0) (86.0) (25) (18.0) (69) (9.5) (50.8) (19.10) (127.0) (60.5) (66.5) (75.5) (31.0) (20)
•Engineering Class Chain has steel roller, and is suitable for use from -4°F to +392°F (-20°C to +200°C).
•Engineering Class Chain does not have guide rail.
•Conveying speed of Engineering Class DOUBLE PLUS Chain is approximately 2.3 x chain speed.
ENGINEERING CLASS
RF03075VR-6T 6 5.906 6.22 1.57 2.56 2.17 6.6
RF03075VR-8T RF03100VR-6T 8 6 (150.0) 7.717 (196.0) 7.874 (158) 8.23 (209) 8.11 0.20 (5) 0.24 (6) 1.024 (26.0) 0.79 (20) (40) 1.77 (45) 1.77 (65) 2.76 (70) 2.76 (55) 2.36 (60) 2.36 (3.0) 9.9 (4.5) 9.9
RF03100VR-8T 8 (200.0) 10.287 (261.3) (206) 10.71 (272) 0.20 (5) 0.24 (6) 1.024 (26.0) 0.79 (20) (45) 1.97 (50) (70) 3.15 (80) (60) 2.76 (70) (4.5) 16.5 (7.5)
RF05100VR-6T 6 7.874 8.07 2.36 3.74 3.15 16.5
RF05100VR-8T RF05150VR-6T 8 6 (200.0) 10.287 (261.3) 11.811 (205) 10.75 (273) 11.97 0.31 (8) 0.35 (9) 1.398 (35.5) 0.98 (25) 0.98 (60) 2.76 (70) 2.76 (95) 4.13 (105) 4.13 (80) 3.54 (90) 3.54 (7.5) 28.7 (13) 33.1
RF05150VR-8T 8 (300.0) 15.433 (392.0) (304) 15.83 (402) 0.31 (8) 0.35 (9) 1.398 (35.5) (25) 1.18 (30) (70) 2.95 (75) (105) 4.53 (115) (90) 3.94 (100) (15) 52.9 (24)
RF10150VR-6T 6 11.811 12.17 1.18 3.15 4.92 4.13 44.1
RF10150VR-8T RF6025VR-6T 8 6 (300.0) 15.433 (392.0) 12.000 (309) 16.06 (408) 12.99 0.43 (11) 0.47 (12) 1.890 (48.0) (30) 1.38 (35) (80) 3.35 (85) 3.74 (125) 5.31 (135) (105) 4.53 (115) (20) 70.6 (32) 64.0
RF6025VR-8T 8 (304.8) 15.677 (398.2) (330) 17.01 (432) 0.55 (14) 0.63 (16) 2.205 (56.0) 1.38 (35) (95) 3.94 (100) 5.71 (145) 4.92 (125) (29) 92.7 (42)
RF12200VR-6T 6 15.748 17.09 1.38 3.94 5.71 4.92 94.9
RF12200VR-8T RF17200VR-6T 8 6 (400.0) 20.575 (522.6) 15.748 (434) 21.93 (557) 17.28 0.55 (14) 0.63 (16) 2.205 (56.0) (35) 1.57 (40) 1.57 (100) 4.33 (110) 4.33 (145) 6.10 (155) 6.10 (125) 5.31 (135) 5.31 (43) 147.8 (67) 103.7
RF17200VR-8T 8 (400.0) 20.575 (522.6) (439) 22.13 (562) 0.59 (15) 0.63 (16) 2.441 (62.0) (40) 1.77 (45) (110) 4.72 (120) (155) 6.89 (175) (135) 5.91 (150) (47) 167.7 (76)
PLASTIC RETURN GUIDES AND BRACKETS
Help maintain low noise levels and ensure a smooth transition.
PLASTIC RETURN GUIDES FOR DOUBLE PLUS® WITH SNAP COVERS
Note: Specify SC type for use with Snap Cover DOUBLE PLUS.
For chain sizes C2030VRP-SC and C2040VRP-SC, use standard plastic return guide.
BRACKET
Bracket Dimensional Data
C2040VRP-R4L C2050VRP-R4L C2030VRP-R3L C2060VRP-R4L C2050VRP-R3H C2060VRP-R4K
Standard and Steel Rail Inserts
Note: The steel rail is fixed to the frame with bolts.
C2030VRP-PGR C2040VRP-PGR C2050VRP-PGR
C2080VRP-PGR
Pallet Guide Rail Dimensional Data
C2030VRP-PGR 0.60 2.89 0.49 2.51 1.02 0.94 1.50 0.28 0.70 0.33 0.22 0.47 0.22 0.33 0.08 0.20 0.37 0.18 0.24 — 0.20 9.84 0.6
(15.3) (73.5) (12.5) (63.8) (26) (24) (38) (7) (17.9) (8.5) (5.5) (12) (5.5) (8.5) (2) (5) (9.5) (4.5) (6) — (5) (3) (0.9)
C2040VRP-PGR 0.68 3.27 0.57 2.88 0.71 0.87 2.12 0.28 0.71 0.41 0.26 0.47 0.26 0.41 0.08 0.22 0.39 0.26 0.22 0.08 0.22 13.12 1.0
(17.3) (83) (14.5) (73.1) (18) (22) (53.75) (7) (18.15) (10.5) (6.5) (12) (6.5) (10.5) (2) (5.5) (10) (6.5) (5.5) (2) (5.5) (4) (1.5)
C2050VRP-PGR 0.88 3.94 0.77 3.50 0.91 0.98 2.55 0.35 0.81 0.53 0.33 0.59 0.33 0.53 0.12 0.30 0.53 0.45 0.20 0.10 0.30 13.12 1.5
(22.3) (100) (19.5) (88.8) (23) (25) (64.8) (9) (20.7) (13.5) (8.5) (15) (8.5) (13.5) (3) (7.5) (13.5) (11.5) (5) (2.5) (7.5) (4) (2.2)
C2060VRP-PGR 0.88 4.57 0.77 4.13 1.26 1.12 2.94 0.35 0.81 0.53 0.33 0.59 0.33 0.53 0.14 0.30 0.55 0.45 0.20 0.39 0.28 13.12 1.7
(22.3) (116) (19.5) (104.9) (32) (28.5) (74.75) (9) (20.6) (13.5) (8.5) (15) (8.5) (13.5) (3.5) (7.5) (14) (11.5) (5) (10) (7) (4) (2.5)
C2080VRP-PGR 0.88 6.10 0.77 5.67 2.46 2.46 3.15 0.35 0.81 0.53 0.33 0.59 0.33 0.53 0.16 0.30 0.57 0.45 0.16 0.12 0.30 9.84 2.4
(22.3) (155) (19.5) (144) (62.5) (62.5) (80) (9) (20.5) (13.5) (8.5) (15) (8.5) (13.5) (4) (7.5) (14.5) (11.5) (4) (3) (7.5) (3) (3.5)
I. Confirm operating conditions for
DOUBLE PLUS® conveyor.
The following information is needed to select the appropriate chain:
a.
Material, weight, dimension, and quantity of the conveyed object (including pallet)
b.
Conveyor speed
c.
Conveyor length (the length for accumulating and transferring section respectively)
d.
Lubrication requirements and environment
II. Select initial chain size.
The proper selection of DOUBLE PLUS Chain considers the vertical force exerted on the rollers, as well as the tension on the chain due to friction that results. Make initial chain selection based on maximum allowable chain tension. (See Table 1a or 1b.)
TT = WTx f x K
TT:Total chain(s) tension (kgf or lbs.)
WT:Total weight of conveyed object except chain (kg or lbs.)
f: Coefficient of friction f=f2+f3 (See Table 2.)
K: Chain speed coefficient (See Table 3.)
Note: If two strands of chain are used, multiply TT by 0.6 to find tension per strand.
Table 1a. Maximum Allowable Chain Tension Table 1b. Maximum Allowable Chain Tension Standard and DOUBLE PLUS® Chain Engineering Class DOUBLE PLUS® Chain with Snap Covers
RF03075VR 930
Regular Plastic 120 200 310 460 1,190 RF03100VR (420)
(56) (90) (140) (210) (540)
RF05100VR 2,200 High-Friction Plastic 60 100 155 230 595 RF05150VR (1,000)
(28) (45) (70) (105) (270)
RF10150VR 3,530 Stainless Steel 60 100 155 230 595 (1,600)
(28) (45) (70) (105) (270)
RF6025VR 5,950 Steel 220 350 550 840 — RF12200VR (2,700)
(100) (160) (250) (380) — RF17200VR 7,720
Note: These factors are for your reference only.
(3,500)
Note: These factors are for your reference only.
Table 2. Coefficient of Friction for DOUBLE PLUS® Chains Table 3. Chain Speed Coefficient
0~50 (0~15) 1.0
50~100 (15~30) 1.2
Note: These factors are for your reference only. For speeds greater than those indicated, consult U.S. Tsubaki.
Note: These factors are for your reference only. We suggest oiling steel roller type.
The roller load due to conveyed objects (see Fig. 1) should not exceed the values shown in Table 4a or 4b (Table depends on product used.)
Figure 1–Conveyed object weight per roller
Table 4a. Maximum Allowable Roller Load* Standard and DOUBLE PLUS® Chain with Snap Covers
Note: These factors are for your reference only. *This is the load for two strands of DOUBLE PLUS® Chain
Table 4b. Maximum Allowable Roller Load Engineering Class DOUBLE PLUS® Chain
In general, a DOUBLE PLUS® system uses two strands of chain. When calculating the total chain tension (TT), be sure to include the weight of each strand. The chain tension (TT) is calculated using the following formula:
Figure 2–Distribution of product line
TT = (W1+ M) L1 x f1 + W2 x L2x f2 + (W2+ M) L2 x f3 +
1.1 M (L1+L2) f1
0.6 x TT x K = Maximum allowable chain tension (Table 1a or 1b)
TT: Total chain tension (lbs. or kgf)
Ts: Chain Tension/Strand (lbs. or kgf)
W1: Weight of conveyed objects in conveying portion
(lbs./ft. or kg/m) W2: Weight of conveyed objects in accumulating portion (lbs./ft. or kg/m)
M: Weight of chain and slat, etc. (lbs./ft. or kg/m)
L1: Length of conveying portion (ft. or m)
L2: Length of accumulating portion (ft. or m)
f1: Coefficient of friction between chain and rail
when conveying
f2: Coefficient of friction between chain and conveyed object when accumulating
f3: Coefficient of friction between chain and rail
when accumulating HP: Required horsepower kW: Required kilowatts
V: Chain speed (ft./min. or m/min.)
.: Transmission efficiency of drive unit
Note: When there are two strands in parallel, the maximum chain tension should be Ts = 0.6 x TT.
HP = TTV x 1.1 or kW = TTV x 1.1 33,000. 6,120.
Note: These factors are for your reference only.
Selection Procedure Example.
i) Confirm operating conditions for DOUBLE PLUS® conveyor.
Conveyor length: 30 ft. (9.14 m) Dimensions of conveyed object: 1.5 ft. (0.46 m) square Weight of conveyed object: 53 lbs. (24 kg)/piece
53 lbs./piece ÷ 1.5 ft. = 35.3 lbs./ft. (52.6 kg/m) Conveyed product speed: 30 ft./min (9.14 m/min). Chain speed: 12 ft./min. (3.66 m/min.) Full conveyor accumulating Quantity of conveyed object: 20 pieces Dry, in-plant use, normal operating temps (up to 77°F)
ii) Select initial chain size.
Using the calculation method in Section II. on page 12:
TT = WT x (f2 + f3) x K
TT = (35.3 lbs./ft. x 30 ft.) x (0.1 + 0.2) x 1.0 = 318 lbs. (144 kgf)
Ts = 318 lbs. x 0.6 = 190.8 lbs (86.5 kgf)
Note: Presume two strands of chain, each loaded by 0.6 of the total.
Based on these calculations, C2040VRP-A chain is the preliminary choice, but this selection must be confirmed.
Note: C2040VRP-A weight/ft. = 0.67 lbs./ft. (1.0 kg/m) per strand [1.34 lbs./ft. (2.0 kg/m) for two strands].
iii) Confirm the maximum allowable roller load.
By consulting Table 4a or 4b, you find that for C2040VRP-A, the maximum allowable roller load is 40 lbs./ft. (60 kg/m) for aluminum rail.
In this example, the weight of the conveyed object is 35.3 lbs./ft.
(52.6 kg/m). Therefore, C2040VRP-A can cover roller load.
iv) Confirm total chain tension.
Using the calculation method of total chain tension (TT):
TT = (0 + 1.34) x 0 x 0.08 + 35.3 x 30 x 0.10 + (35.3 + 1.34) x 30 x 0.20 + 1.1 x 1.34 x (0 + 30) x 0.08
TT = 329 lbs. (149 kgf)
TS = TT x 0.6 = 197 lbs. (89 kgf) per strand
Now determine chain size.
Multiply the chain tension (TS) by the chain speed coefficient (K)
listed in Table 3, confirm with the following formula:
TSx K = Maximum allowable chain tension (Table 1a or 1b).
197 x 1.0 = 200 (C2040VRP regular plastic)
In this example, we would choose C2040VRP-A Chain.
v) Calculate required power.
*Presume gearmotor efficiency (. ) = 0.8 329 lbs. x 12 ft./min. x 1.1 = 0.17 = 1/4 HP motor
HP = 33,000 x 0.8
149 kgf x 3.66 m/min. x 1.1 = .13 kW = 0.2 kW motorkW = 6,120 x 0.8
• This calculation sample is for your reference only.
I. Dimensions for both ends of the conveyor. A typical arrangement of DOUBLE PLUS® components is illustrated in Fig. 3. The bracket is used to mount the plastic return guide to the aluminum guide rail, allowing the chain to flow smoothly between the sprocket and guide rail. See Table 5a for dimensions.
Figure 3–Typical arrangement of DOUBLE PLUS® components
Table 5a. Conveyor End Dimensions
Units-in. (mm)
Chain No. Z L1 L2 L2 H
(Driver side) (Driven side)
C2030VRP-R3L 0.839 1.57 8.27 3.15 0.98
C2030VRP-R3LS (21.3) (40) (210) (80) (25)
C2040VRP-R4L 0.579 1.97 11.81 3.94 0.98
C2040VRP-R4LS (14.7) (50) (300) (100) (25)
C2050VRP-R4L 0.634
C2050VRP-R4LS (16.1) 2.36 13.39 4.72 1.18
C2050VRP-R3H 3.000 (60) (340) (120) (30)
C2050VRP-R3HS (76.2)
C2060VRP-R4K 0.587 2.76 16.93 5.12 1.57
C2060VRP-R4LS (14.9) (70) (430) (130) (40)
C2080VRP-R3LS 0.945 3.94 21.65 7.87 2.36
(24) (100) (550) (200) (60)
II. Screws, bolts, height of conveyor.
The values for L shown in Table 5b and Fig. 4 vary because of the plastic bumper wall thickness tolerance.
Connecting the aluminum guide rail
Connect the aluminum guide rails by aligning the V groove shown by arrow A in Fig. 4.
Installing the pallet guide rail
Drill holes using the V groove as a guide, shown by arrow B in Fig. 4, and install the pallet guide rail using socket head cap screws from Table 5b.
Figure 4–Location of screws, bolts
Table 5b. Screws, Bolts, Height of Conveyor
C2030VRP-R3L M6 x 10 l M6 M5 M6 M5 2.42 0.57
C2030VRP-R3LS (61.5) (14.5)
C2040VRP-R4L M6 x 12 l M6 M6 M8 M6 2.68 1.12
C2040VRP-R4LS (68) (28.5)
C2050VRP-R4L M8 x 20 l M8 M8 M10 M8 3.25 1.42
C2050VRP-R4LS (82.5) (36)
C2050VRP-R3H M8 x 20 l M8 M8 M10 M8 5.61 1.46
C2050VRP-R3HS (142.5) (37)
C2060VRP-R4K
C2060VRP-R4L M8 x 20 l M8 M8 M10 M8 3.74 1.75
C2060VRP-R4LS (95) (44.5)
C2080VRP-R3LS M8 x 25 l M8 M8 M10 M8 5.12 1.85
(130) (47)
Proper operation of DOUBLE PLUS® Chain is maintained by controlling the amount of deflection of the aluminum guide rail. This deflection is determined from the weight of the conveyed goods and the second moment of area, shown in Table 5c. To control deflec
tion, supports should be spaced as shown in Fig. 5, in accordance with the following equation:
Determining support spacing
[384 x E x I x 0 x 12] 1/4 l (in.) = 5 x 0.6 x W
[384 x E x I x 0 x 107] 1/4 l (mm) =5 x 0.6 x W
l = spacing support (inches or mm)
E = Young’s Modulus = 9.956 x 106 lbs./in. (7.0 x 103 kg/mm2)
I = Second moment of area = in.4 (cm4) (See Table 5c.)
0 = Deflection = 0.079 in. (2mm)
W = Total conveyed weight = lbs./ft. (kg/m)
Note: The total conveyed weight (W) is not always distributed evenly between the two conveyor strands. This is taken into account with the factor 0.6.
Figure 5–Nominal spacing of conveyor supports (l)
Put a chamfer on the ends of the upper rail that the chain’s small rollers travel on (Fig. 6).
Figure 6–Location of Chamfer
(1) Two basic constructions are used when building guide rail with aluminum frame and steel rail:
For C2030VRP-R3LS, a steel rail (no. 3) is arranged in the vertical position and lock screws (no. 4) are secured into the frame (no. 1) from both sides (see Fig. 7a). See Table 5d for dimensions and hardware.
Figure 7a–Cross section of C2030VRP-R3LS
Lock screws (no. 4) are secured through the inner rail (no. 2), which anchors the steel rail (no. 3) to the frame (no. 1) (see Fig. 7b). See Table 5d for dimensions and hardware.
Figure 7b–Cross section of C2040VRP-C2080VRP frame with steel rail
Table 5d. Aluminum Frame with Steel Rail
Units-in. (mm) Rail No. Steel rail (Part No. 3) Dimensions (Plate thickness x width) in. (mm) “A” dimension in. (mm) Installation screws for steel rail (Part No. 4). philips pan head machine screws Installation screws for steel rail (Part No. 5). philips flat head machine screws
C2030VRP-R3LS C2040VRP-R4LS C2050VRP-R4LS C2050VRP-R3HS C2060VRP-R4LS C2080VRP-R3LS .12 x .51 (3 x 13) .12 x .51 (3 x 13) .12 x .51 (3 x 13) .12 x .51 (3 x 13) .12 x .51 (3 x 13) .24 x .63 (6 x 16) .187 (4.75) .315 (8.0) .315 (8.0) .315 (8.0) .315 (8.0) .413 (10.5) M3 x 7 l M4 x 5 l M4 x 6 l M4 x 6 l M4 x 6 l M5 x 8 l — M4 x 6 l M4 x 6 l M4 x 6 l M4 x 6 l M6 x 10 l
(2) Assembly drawing
When joining rail sections to form a longer conveyor, please refer to Fig. 8.
Table 5e. Steel Rail Assembly Dimensions
Units-in. (mm) Rail No. A B C D E F
C2040VRP-R4LS
C2050VRP-R4LS 157.5 1.18 19.09
C2060VRP-R4LS (4000) (30) (485) 19.09 2.36 1.18
C2050VRP-R3LS 118.1 0.59 18.90 (485) (60) (30)
C2080VRP-R3LS (3000) (15) (480)
(3) Important points when handling steel guide rail
• When cutting the guide rail with steel rail
1) Cut anywhere other than the central portion or screwed portions of the rail. 2) Remove burrs, etc., that occur on the cut surface.
3) Insert lock screws into the steel rail and inner rail along with the inner rail and main rail at 0.6 - 1.2 in. (15 - 30 mm) from the cut end.
4) Machine all parts individually.
5) Completely remove all burrs before reassembly.
Note: Use screws according to Table 5d when reassembling the conveyor.
• When connecting the rail
After connecting the rail, put small chamfers on the mating faces of the steel rail where steps occur (in both vertical and lateral directions). These prevent the chain rollers from getting caught at these areas.
To convey pallets in a stable condition at the transfer portion of the conveyor, install a roller between the two conveyors or the shafts of the sprockets (see Fig. 9). Be sure that the distance l from the ends of the rail to the roller that supports the pallets is less than 1/2.5 times the pallet length in the conveying direction.
Figure 9–Install a roller as shown for a straight line transfer
The amount of take-up l = (L x 0.02) + marginal length
(0.02 = Allowable chain wear elongation 2%)
Allow for some sagging (up to 10% of the span) in the chain on the bottom of the driver sprocket. Adjust the take-up so that the slack does not exceed the values in Table 5f. (see Fig. 10.) In addition, the total arc of contact between the chain and sprocket should be more than 130°. If take-up cannot be set up as shown in Fig. 11 due to space limitations, refer to Fig. 12.
Table 5f. Chain Slack for DOUBLE PLUS®
C2030 .10 (25) 2.95 (75)
C2040 1.38 (35) 4.13 (105)
C2050 1.57 (40) 4.72 (120)
C2060 1.97 (50) 5.90 (150)
C2080 2.56 (65) 7.48 (190)
Figure 10–Slack tolerance
Figure 12–Take-up arrangement for limited space
DOUBLE PLUS® Chain operates well on conveyors with lengths not exceeding 50 ft. (15 m). When conveyor distances are greater than 50 ft. (15 m), make several shorter conveyors in line. If you require one continuous system longer than 50 ft. (15 m), consult U.S. Tsubaki.
When using the arrangement as shown in Fig. 13, be aware that the sprocket cannot engage the chain from the top surface of the snap covers. When bending the chain toward the snap cover side, do not bend beyond the R dimension of the plastic return guide (see page 8). Snap covers and installation are shown in Figs. 14 and 15.
Figure 13–Take-up arrangement for limited space for DOUBLE PLUS® with Snap Covers
Figure 14–Snap covers for outer and inner links
Figure 15–Proper installation of snap covers
DOUBLE PLUS with plastic rollers is designed to operate in a dry • Steel roller DOUBLE PLUS requires lubrication. Use SAE 10 ~ 20.
environment without contamination from water or oil. Otherwise, (For Engineering Class DOUBLE PLUS chain use SAE 30 ~ 40).
the start-up function of the chain will be minimized or eliminated,
making conveying difficult. Figure 16–Lubricating DOUBLE PLUS® chain
Transfer product onto DOUBLE PLUS chain smoothly, and avoid dropping heavy product onto the chain.
DOUBLE PLUS with plastic rollers is designed to operate without lubrication.
• If the chain begins to make noise in the sprocket area because of a lack of oil, lubrication may be applied carefully, at the space between the link plates (see Fig. 16). If oil gets on plastic rollers, clean them immediately.
DOUBLE PLUS® Chain and Sprockets
Conveying and Accumulating
PLUS: Increased Output PLUS:Reduced Operating Costs
