Wednesday 11th January 2017

Are you connecting motors to pumps?

Consider the Sure-Flex® flexible shaft coupling range available from Abssac, which was designed specifically with that industry in mind. With large stocks kept, we offer an excellent solution to your pump coupling requirements.  The easy to fit Sure-Flex® elastomeric shaft couplings rely on a proven element produced from a elastic polymer, to absorb the shaft misalignments but also transmit torque whilst simultaneously dealing with shock and vibration.  Sure-Flex®  shaft couplings can be installed quickly and easily because there are no bolts, gaskets, covers or seals. Alignment can be checked with a straight edge placed across the outside of the precision machined flanges. No special tools are needed for installation, alignment or removal.

No lubrication, trouble free operation….

Mr. Phil Jones, from Abssac says“ The teeth of the sleeve lock into the teeth of the flanges without clamps or screws, tightening under torque to provide smooth transmission of power. Since there is no rubbing action of metal against rubber to cause wear, the couplings are not affected by abrasives, dirt or moisture. This eliminates the need for lubrication or maintenance, whilst providing clean dependable, quiet performance.”

The four way flexing action….

The 4-way flexing action absorbs virtually all types of shock, misalignment and end float. With Sure-Flex couplings, the need for lubrication and maintenance is also eliminated. As a result, the couplings provide clean, dependable and quiet performance for a variety of applications.

Flexing action #1 -TORSIONAL Flexibility !

Sure-Flex coupling sleeves have an exceptional ability to absorb torsional shock and dampen torsional vibrations. The EPDM and Neoprene sleeves wind-up approximately 15° torsionally at their rated torque. Hytrel sleeves will wind-up about 7°.

Flexing action #2 - ANGULAR  Flexibility !

The unique design of the Sure-Flex coupling's teeth allows for the absorption of angular misalignment without wear. These limits allow for the alignment of the coupling using only a scale and calipers.

Flexing action #3 - PARALLEL Flexibility !

Parallel misalignment is absorbed without wear or appreciable energy losses. The lateral flexibility of the coupling sleeve minimizes radial bearing loads normally associated with parallel misalignment. This feature also allows for easier installation by the use of components bored for slip fits without fretting corrosion occurring at the shaft. Only a straight-edge and feeler gage are required to obtain these limits.

Flexing action #4 - AXIAL Flexibility !

Sure-Flex couplings may be used in applications where there are limited axial shaft movements. The axial compressibility of the EPDM and Neoprene sleeves allows for shaft end-float without the absolute transfer of thrust loads.

30 years of product knowledge combined with a large stock of Sure-Flex Couplings and Sleeves provides a great basic shaft coupling solution.

With knowledgeable staff always available, we stock and supply the Sure-Flex® elastomeric shaft coupling. The basic coupling uses two cast hubs available prebored or pilot bored and  a proven centre element produced from a elastic polymer, to  compensate for ardous shaft misalignments.  The proven product delivers reliable torque transmission whilst simultaneously dealing with shock and vibration. EPDM and Neoprene sleeves have excellent dampening properties where as the Hytrel sleeves are for higher torques and petrochemical resistance.

Sure-Flex®  shaft couplings can be installed quickly and easily because there are no bolts, gaskets, covers or seals. Alignment can be checked with a straight edge placed across the outside of the precision machined flanges. No special tools are needed for installation, alignment or removal. Their 4-way flexing action absorbs virtually all types of shock, misalignment, and end float. With Sure-Flex couplings, the need for lubrication and maintenance is also eliminated. As a result, these couplings provide clean, dependable, and quiet performance for a variety of applications.

The Lubrication-free design provides quiet, reliable performance.
The uniquely designed teeth allow lateral flexibility whilst accepting both parallel and angular misalignment without wear.

If you require further technical information, please do not hesitate to contact our sales engineers who will be more than happy to help you with your selection.

Sure-Flex sleeves are available in four materials or compounds and various shape configurations.

Sleeve Material EPDM NEOPRENE HYTREL URETHANE
Available Sleeve Styles  Style designator
  1 pc, unsplit JE JN H U
  1 pc, split JES JNS - -
  2 piece E N HS -
Typical Use General Purpose Oil Resist Non-flame General Purpose Stiffness

       
Torsional wind up 15° 15°
Angular Misalignment 1/4° 1/4°
Temperature (C°)  
Maximum +135° +94° +122° +94°
Minimum -34° -17° -54° -63°

 

Available SURE-FLEX sleeve sizes

Product No. Product Description   Product No. Product Description   Product No. Product Description
3J 3JE EPDM 4 4E EPDM 6H 6H Hytrel
4J 4JE EPDM 5 5E EPDM 7H 7H Hytrel
5J 5JE EPDM 6 6E EPDM 8H 8H Hytrel
6J 6JE EPDM 7 7E EPDM 9H 9H Hytrel
7J 7JE EPDM 8 8E EPDM 10H 10H Hytrel
8J 8JE EPDM 9 9E EPDM 11H 11H Hytrel
9J 9JE EPDM 10 10E EPDM 12H 12H Hytrel
10J 10JE EPDM 11 11E EPDM
12 12E EPDM 6HS 6HS Split Hytrel
3JS 3JES EPDM Split 13 13E EPDM 7HS 7HS Split Hytrel
4JS 4JES EPDM Split 14 14E EPDM 8HS 8HS Split Hytrel
5JS 5JES EPDM Split 16 16E EPDM 9HS 9HS Split Hytrel
6JS 6JES EPDM Split 10HS 10HS Split Hytrel
7JS 7JES EPDM Split 4N 4N Neoprene 11HS 11HS Split Hytrel
8JS 8JES EPDM Split 5N 5N Neoprene 12HS 12HS Split Hytrel
9JS 9JES EPDM Split 6N 6N Neoprene 13HS 13HS Split Hytrel
10JS 10JES EPDM Split 7N 7N Neoprene 14HS 14HS Split Hytrel
8N 8N Neoprene
3JN 3JN Neoprene 9N 9N Neoprene 10U 10U Urethane
4JN 4JN Neoprene 10N 10N Neoprene 11U 11U Urethane
5JN 5JN Neoprene 11N 11N Neoprene 12U 12U Urethane
6JN 6JN Neoprene 12N 12N Neoprene  
7JN 7JN Neoprene 13N 13N Neoprene
8JN 8JN Neoprene 14N 14N Neoprene
 
3JNS 3JNS Neoprene Split
4JNS 4JNS Neoprene Split
5JNS 5JNS Neoprene Split
6JNS 6JNS Neoprene Split
7JNS 7JNS Neoprene Split
8JNS 8JNS Neoprene Split

 

Coupling Ratings (Metric)

Size EPDM
Sleeves
Neoprene
Sleeves
KW @ RPM Torque
(Nm)
Stiffness
(Nm/rad)
Max RPM
100 970 1450 3000
3 JE,JES JN,JNS 0.07 0.69 1.03 2.13 6.8 26 9200
4 E,JE,JES N,JN,JNS 0.14 1.38 2.06 4.26 13.6 52 7600
5 E,JE,JES N,JN,JNS 0.28 2.75 4.12 8.52 27.1 104 7600
6 E,JE,JES N,JN,JNS 0.53 5.16 7.72 15.97 50.8 194 6000
7 E,JE,JES N,JN,JNS 0.86 8.32 12.44 25.73 82.0 313 5250
8 E,JE,JES N,JN,JNS 1.34 13.03 19.47 40.29 128.2 490 4500
9 E,JE,JES N 2.13 20.66 30.88 63.89 203.4 777 3750
10 E,JE,JES N 3.40 33.00 49.32 102.05 324.8 1241 3600
11 E N 5.36 51.99 77.72 160.79 511.8 1955 3600
12 E N 8.52 82.63 123.52 255.57 813.5 3107 2800
13 E N 13.43 130.26 194.72 402.87 1282.4 4898 2400
14 E N 21.30 206.58 308.81 638.92 2033.7 7768 2200
16 E   55.91 542.28 810.63 1677.16 5338.5 20392 1500

 

Size Hytrel
Sleeves
Urethane
Sleeves
KW @ RPM Torque
(Nm)
Stiffness
(Nm/rad)
Max RPM
100 970 1450 3000
6 H,HS   2.13 20.66 30.88 63.89 203.4 1130 6000
7 H,HS   3.40 33.00 49.32 102.05 324.8 2260 5250
8 H,HS   5.36 51.99 77.72 160.79 511.8 3390 4500
9 H,HS   8.52 82.63 123.52 255.57 813.5 5367 3750
10 H,HS U 13.43 130.26 194.72 402.87 1282.4 11299* 3600
11 H,HS U 21.30 206.58 308.81 638.92 2033.7 14123* 3600
12 H,HS U 37.27 361.52 540.42 1118.11 3559.0 25422* 2800
13 HS   55.93 542.49 810.94 1677.80 5340.6 41680 2400
14 HS   85.76 831.84 1243.48 2572.71 8189.1 67028 2200

 

Flexible sleeves for Sure-Flex couplings are available in four materials (EPDM, Neoprene, Hytrel and Urethane) and in three basic constructions. The various types are shown and described here.

 

JE-JES-JN-JNS

J sleeves are molded EPDM rubber (E) or Neoprene (N). They are available in one-piece solid construction (JE, JN) or one-piece split construction (JES, JNS). These sleeves may be used in any Sure-Flex flange within a given size.

E-N

These sleeves are of two-piece design with a retaining ring. They are available in either EPDM (E) or Neoprene (N). They may be used with any flange within a given size. Sleeves are shown here assembled and disassembled.

H-HS-U

H (Hytrel) and U (Urethane) sleeves designed for high-torque applications, transmit four times as much power as an equivalent EPDM or Neoprene sleeve. Available in one-piece solid construction (H or U) or two-piece split construction (HS), these can be used only with S, C, and SC flanges. They cannot be used with J or B flanges or as direct replacements for EPDM or Neoprene sleeves.

 

 

Set us the challenge. Ask one of our knowleadable engineers for a SUREFLEX pump coupling quotation : 01386 421005