U.S. Tsubaki Roller Chain Couplings
• Connect quickly and easily
• Handle high torque
• Keep your profits turning
Roller Chain Couplings
The Quality Connection
Roller Chain Couplings from U.S. Tsubaki are your connection to better profits and productivity. We’ve combined the best in the business — high-quality Roller Chain with a pair of specially cut, hardened-tooth Sprockets — to create a powerful, flexible coupling that keeps your operation running at peak performance.
For clean areas and light loads, choose our Nylon Chain Couplings. Assembled couplings are also available upon request.
Make the Connection
Farming... mining... metal manufacturing...and more. When you need to connect two shafts, Roller Chain Couplings from U.S. Tsubaki are the right choice.
You can’t make a better match!
• Simple to Install Save valuable production time by getting your lines up and running fast. Simple construction makes our units easy to install, remove, and replace. Our unique, single-pin connection of the chain keeps downtime — and hassles — to a minimum. One clip is all it takes!
• Compact and Powerful Remarkably efficient construction transmits torque easily by apportioning it over the entire strand of roller chain and all the sprocket teeth. You get the power you need to drive your business at an economical unit price.
• Flexible for Easy Alignment Clearances within the chain itself and between the chain and the sprocket teeth make our Roller Chain Couplings flexible and responsive. They align quickly and accurately and protect against overheating and abrasion caused by expansion or contraction of the shaft. You save time and money on adjustments and repairs.
• Built to Last
Get the only flexible coupling on the market built to the quality standards of U.S. Tsubaki. Special double-strand roller chain with single-pin connector. Precision hardened sprockets with our standard dual set screw locking arrangment. The durability you need to handle high speed and torque, keeping maintenance and replacement costs low.
Coupling Covers Add Safety and Efficiency
Coupling Covers improve the safety, cleanliness, and overall performance of your system. Safe and smart, they protect the unit from outside elements and provide better workplace operation.
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Split-type construction provides easy installation and inspection.
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Continuous lubrication keeps lines running smoothly with minimum maintenance, extending service life.
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Smooth-surface design covers entire unit with no projecting bolts, providing a neat appearance and safe operation.
Reduce Your Hassles with
a Single, Reliable Source
Partner with U.S. Tsubaki for savings and convenience. You benefit from the power of one:
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One call to get the highest quality power transmission products available
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One order to track
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One delivery to handle
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One invoice to process
Time is money. Reduce your processing time and increase your profits with a single call to U.S. Tsubaki.
Selection Guidelines
Required Information
1.
Number of hours of daily operation
2.
Classification of load and prime mover
3.
Horsepower or required torque to be transmitted and shaft speed in revolutions/minute
4.
Diameter of both shafts
Method for Selection
1.
Based on the operating conditions, determine the Service Factor, using Table 1.
2.
Obtain the design horsepower by multiplying the horsepower to be transmitted by the Service Factor.
3.
With the required rpm, choose the coupling that satisfies the horsepower from the Horsepower Rating, shown in Table 2.
4.
When the required shaft diameter exceeds the maximum bore diameter of the coupling you have chosen, use a coupling that is one size larger.
5.
In the low-speed range, the shearing pressure might be too great when using a standard key. In this case, calculate the key shearing pressure to determine if it is necessary to use a special key or spline bore.
6.
Note the lubrication system required and select the coupling cover as necessary. In all applications, use of a coupling cover will provide quieter running, longer life, and safer operation.
Cplg No. Max Allowable Transmissible Torque at Below 50 rpm (in lbs.) Speed of rotation (rpm)
1 5 10 25 50 100 200 300 400 500 600 800 1000 1200 1500 1800 2000 2500 3000 3600 4000 4800
4012 1921 0.03 .015 0.30 0.78 1.54 2.32 3.53 4.64 5.57 6.65 7.60 9.40 11.44 12.98 15.56 18.37 19.85 24.00 27.76 32.32 35.32 41.30
4016 3416 0.05 0.28 0.55 1.38 2.76 4.14 6.29 8.27 9.94 11.87 13.54 6.76 20.52 23.20 28.16 32.72 35.27 42.78 49.62 57.66 62.89 73.62
5016 6505 0.11 0.52 1.05 2.61 5.24 7.86 11.96 15.69 18.91 22.52 25.75 31.92 38.76 44.12 53.51 62.22 67.05 81.27 94.41 109
5018 8240 0.13 0.67 1.33 3.33 6.64 9.96 15.15 19.98 23.87 28.56 32.72 40.36 49.08 55.79 67.72 78.85 85.02 103 120
6018 15489 0.24 1.25 2.51 6.26 12.51 18.77 28.56 37.55 45.06 53.77 61.55 76.17 92.66 105 128 149 161 194
6020 17868 0.28 1.43 2.88 7.21 14.34 21.55 23.72 43.17 51.85 61.90 70.84 87.59 106.58 121 147 171 185 223
8018 34341 0.55 2.78 5.55 13.81 27.76 41.57 63.30 83.28 99.91 119 135 169 205 233 283 330 355
8020 41027 0.66 3.30 6.61 16.49 33.05 49.55 75.17 99.22 118.54 141.3 162 201 244 278 337 393 423
10020 77710 1.25 6.25 12.51 31.25 62.49 93.87 142 188 225 268 307 380 463 526 638 743
Lubrication System 1 2 3
Table 2. HP Rating Table
Note: Additional service factor for Roller Chain Coupling by operating hours (at 50 r/min and more) 8 hours to 16 hours/day - 0.5 16 hours or more/day - 1.0
Standard RC Couplings Specification Table
Cplg No. Std Finished Bores Incl. Std KW &2 SS Bore Dia. Min. Max. A B C L Approx Cplg. OD. Single Spkt Wt.(lbs) Approx Cplg Chain Wt.(lbs) Approx Assembled Cplg Inertia (in lb sec^2)
4012 ¹/2, 5/8, ³/4 ¹/2 7/8 1¹³/32 1¹/8 ./32 2¹7/32 2¹³/32 0.5 0.4 0.20 x 10 -2
4016 5/8, ³/4, 7/8, ¹5/16 1, 1¹/8, 1³/16*, 1¹/4* ¹/2 15/16 1³¹/32 1¹/8 ./32 2¹7/32 3¹/32 1 0.6 0.60 x 10 -2
5016 ³/4, 7/8, 1, 1¹/8, 1 1¹/4, 1³/8, 17/16, 1¹/2, 15/8* 5/8 1¹¹/16 2¹/2 17/16 ³/8 3¹/4 3²5/32 2.2 1.2 1.89 x 10 -2
5018 ³/4, 7/8, 1, 1¹/8, 1 1¹/4, 1³/8, 17/16, 1¹/2, 15/8, 1³/4, 17/8*, 1¹5/16* 5/8 2 2³¹/32 1¹¹/16 ³/8 3³/4 4³/16 3.5 1.4 3.39 x 10 -2
6018 1, 1¹/8, 1³/16, 1¹/4 1.7/16, 1¹/2, 15/8, 1³/4, 17/8, 1¹5/16, 2, 2¹/8, 2³/16, 2¹/4, 2³/8*, 27/16* 1 27/16 3¹/2 17/8 7/16 4³/16 5 5 2.4 8.09 x 10 -2
6020 1¹/8, 1¹/4, 1¹/2, 1³/4 2¹/8, 2³/8*, 27/16*, 25/8* 1 2³/4 37/8 2 7/16 47/16 5¹/2 6.5 2.6 12.4 x 10 -2
8018 1¹/8, 1³/4, 1¹5/16, 2 2³/8, 27/16, 25/8, 27/8*, 2¹5/16* 1¹/8 3¹/8 4./16 2³/8 ./16 5²¹/64 65/8 11 5.5 31.9 x 10 -2
8020 1¹/2, 2³/16, 27/16, 2 2¹5/16, 3¹/8, 3³/8*, 37/16* 1¹/8 3./16 5³/8 25/8 ./16 5¹/2 7./32 16.3 6.1 53.8 x 10 -2
10020 2, 3³/8, 37/16, 3¹5/16 1¹/2 45/8 6²³/32 3¹/8 ²³/32 6³¹/32 9¹/8 31.8 10.8 158 x 10 -2
Notes: The dimensions marked with an asterisk indicates set screws at 90 deg. from keyway.
Covers
Covers allow excellent lubrication, and their use is suggested on all applications to increase both product life and safety.
Cover For Wt. Cplg. Cover Inertia
Part No. Sizes D W Lbs. (in lb. sec `2)
40 Cover 4012 - 4016 4 2 .85 0.69 x 10 -2
50 Cover 5016 - 5018 5¹/8 2³/8 1.45 2.00 x 10 -2
60 Cover 6018 - 6020 6³/8 2¹5/16 2.55 5.40 x 10 -2
80 Cover 8018 - 8020 8³/16 4 5.05 18.9 x 10 -2
10020 Cover 10020 10¹/8 5¹/4 12.55 55.8 x 10 -2
Aluminum covers are supplied with seals to cover the listed sizes.
QD® Coupling TAPER-LOCK® Coupling
• QD® Couplings
*Maximum bore indicated is the maximum bore suggested with standard keyway.
**K dimension reflects the minimum clearance to remove the coupling half by using the screws as jack screws.
***Approximate weight of coupling half with bushing.
• TAPER-LOCK® Couplings
Type “TLH” Coupling Number Type “TLF” Coupling Number Max. Torque (in lbs.unit) Bushing Used Bushing Data Max. Bore Min. Bore A B C J* K** L Coupling O.D. Wt. Lbs.***
4016TLH 4016TLF 1300 1108 11/8 1/2 131/32 7/8 9/32 5/8 3/4 21/32 31/32 .90
5018TLH 5018TLF 4300 1610 15/8 1/2 231/32 1 3/8 13/16 11/16 23/8 43/16 1.10
6020TLH 6020TLF 7150 2012 2 1/2 37/8 11/4 7/16 15/16 13/8 215/16 5 1/2 2.70
8020TLH 8020TLF 24,000 3020 3 15/16 53/8 2 37/64 13/16 21/16 437/64 719/64 6.10
10020TLH 10020TLF 44,800 3535 31/2 13/16 623/32 31/2 23/32 2 25/8 7 23/32 91/8 19.00
NOTE:
For H type TAPER-LOCK bushing installs from the hub side of the flange.
For F type TAPER-LOCK bushing installs from the face side.
*Space required to tighten bushing with shortened hex key. Space is also required to loosen screws to permit the removal of the hub by the puller.
**Space required to loosen bushing with shortened hex key using screws as jack screws. No puller is required.
***Approximate weight of coupling half with bushing.
QD® is a registered trademark of and is used under license from Emerson Electric Company.
TAPER-LOCK® is a registered trademark of Reliance Electric Company.
Lubrication
Choose one of the following lubrication systems when using Roller Chain Couplings. The choice depends upon the operating speed. (Refer to the Horsepower Ratings, Table 2, pg.3.) Use NLGI grade 1 or 2 grease.
The amount of grease to apply is shown in Table 3. If these amounts are followed, there will be a slight amount of leakage at the beginning of the operation, but this will soon stop.
For System 3, it is especially important to use high-grade grease. Because of centrifugal force, there is a tendency for the grease to stick to the inner surface of the cover, resulting in inadequate lubrication.
Installation
1.
Place the oil seals for the cover on the sprocket halves.
2.
Bring the sprocket faces close together and correct the angular and offset misalignment.
Adjust the angular Place a straight edge at the misalignment (alpha bottom of corresponding symbol) so that the width teeth of the two sprockets of the tooth surface T is and adjust so that the the same around the offset misalignment is circumference of the minimized. The allowable sprockets. The allowable offset misalignment angular misalignment is 2% of the chain pitch.
is 1°.
When the sprocket speed is 1/3 or more of the maximum speed (i.e., it lies on the right side of the dark line in the Horsepower Rating table, pg.3), the allowable angular and offset misalignments are 0.5° and 1% of the chain pitch.
3.
Measure the distance “C” between the sprocket faces and firmly fasten the set bolt (refer to Specifications table, pg.4).
4.
Lubricate the chain with grease, then wrap the chain around both sprockets and fix with the connecting pin.
5.
Fill the required quantity of grease into both sides of case and fasten them firmly. Do not forget to use gaskets.
Notes:
1. During high-speed operations or conditions of large vibration, please use locking cement when fastening the bolts.
2. Install a cover when there is a risk of chain breakage.
3.
Ambient temperature range is 14° to 140°F. If you will use the coupling outside this temperature range, please consult with U.S. Tsubaki.
