SDP/SI SHOP ONLINE (800) 819-8900
Menu

    Products   Fairloc® - The Integral Fastener

Download Fairloc® White Paper

Fairloc® is the better way to fasten rotating components. It solves phasing, timing, positioning and frequent removal problems.

  • Easy Adjustment Fairloc® replaces set screws and clamps; components can be repositioned with a single hex key adjustment.
  • Will not Mar Shaft
  • Outstanding Reliability
  • Compact, Self-Contained Design When available space or access is
  • limited Fairloc's® small hub envelope is a distinct advantage.
  • Full Use of the Bore Gives maximum support to the component,
reduces wobble or misalignment.
  • Superior to Other Fasteners in High-Torque Applications

Here’s how it Works
Two slots are machined into the hub; one oriented radially, the other angularly, to create a transverse wedge which remains attached to the solid portion of the hub on one side. The resultant cantilevered clamping section has a tapped hole to accept a cap screw which passes through a clearance hole in the solid portion of the hub, and into a threaded hole in the transverse wedge section. As the screw is tightened, the cantilevered section clamps the shaft securely. The screw can be tightened and released repeatedly without marring the shaft or affecting its torque transmitting abilities.

Proven Effectiveness
For precision application – Lab tests proved Fairloc® to be superior to all other comparable fasteners. For high-torque application – Torques up to 400 lbf/in are obtained with a 5/8" bore Fairloc® hub




FAIRLOC® HUBS ARE USED IN CUSTOM DESIGNS:




Fastening Method Shaft Remains Smooth Self-Contained Component is Fully Supported Easy Adjustment Can be Pinned if Desired
Clamps YES NO NO YES NO
Fairloc ® YES YES YES YES YES
Keys NO NO NO NO NO
Pins NO NO NO NO YES
Set Screws NO NO NO NO YES
Our application engineers are available to assist you with any simple or complex design problems. We can offer solutions by matching the right component to your need, supplying value added services or a total design. We provide design, engineering and manufacturing services. We take pride in providing high-quality components, customer satisfaction, on-time delivery and being cost effective.

Typical Applications
Aerospace Components, Aircraft Instrumentation, Aircraft Fuel System Controls, Machine Tools, N/C Machines, Military Fire Control Systems, Medical Equipment, Business Machines, Optical Equipment, Robotic Systems, Power Drives.






FAIRLOC® TORQUE DATA:




Precision Bellows Couplings
Fairloc® is a component fastening system that is built into the hub of the part.

The relationship between the clamp screw fastening torque and the torque at which the component starts to slip on the shaft is shown in the graphs. These are typical values for Stainless Steel Gears mounted on Stainless Steel Shafts.

For best results, the space between the component bore and shaft O.D. should be controlled closely. In addition, lubricating the clamping screw with molybdenum disulfide grease will improve the clamping action.

CAUTION: Do Not Tighten Screws Without Shaft in the Bore. This will create a permanent set of wedge section which will prevent the shaft from going in.

Precision Bellows Couplings

**Hover images to enlarge**

Figure 1 – shows the torque at which the sample Fairloc® gears started to slip on the shaft.

All gears and shafts were made of 303 Stainless Steel. Gear bores were within +.0003 inch of nominal values. Shafts had surface finishes of 16 micro-inch maximum and were within. -.0002 inch of the nominal diameters.

Figure 2 – compares the slip torques for different values of the clamping screw fastening torques.

Figure 3 – shows the torque at which the sample Fairloc® gears started to slip on the shaft.

All gears and shafts were made of 303 Stainless Steel. Gear bores were within +0.0075 mm of nominal values. Shafts had surface finishes of 0.4µm maximum and were within. -0.005 mm of the nominal diameters.

Figure 4 – compares the slip torques for different values of the clamping screw fastening torques.



PRECISION FAIRLOC® ANTI-BACKLASH GEARS:




Fairloc Anti-backlash Gears

AVAILABLE IN:

Material: Stainless Steel, Aluminum
Pitch: 48 - 120
Pressure Angle: 20°










PRECISION FAIRLOC® MINI-LASH GEARS:



Fairloc Anti-backlash Gears

AVAILABLE IN:

Material: Stainless Steel, Aluminum
Pitch: 64 - 120
Pressure Angle: 20°









PRECISION FAIRLOC® MITER & BEVEL GEARS:


Miniature Bevel Gear with Fairloc Hub

AVAILABLE IN:

Material: Stainless Steel, Aluminum
Pitch: 48 - 72
Pressure Angle: 20°


These Precision Bevel Gear sets are supplied with a 1/4 bore and are AGMA 10 rated. Fairloc hubs require controlled shaft tolerances. Suggested clearance fit between the bore and the shaft is .0001/.0008. They are sold as a set. Socket head cap screw is supplied.







PRECISION FAIRLOC® PLASTIC SPUR GEARS:


Precision Fairloc Plastic Spur Gears

AVAILABLE IN:

Material: Acetal with Stainless Steel Hub
Pitch: 24 - 72
Module: 0.5 - 1
Pressure Angle: 20°







PRECISION FAIRLOC® STAINLESS STEEL SPUR GEARS:


Precision Fairloc Stainless Steel Spur Gears

AVAILABLE IN:

Pitch: 24 - 48
Module: 0.5 - 1
Pressure Angle: 20°







PRECISION FAIRLOC® MINIATURE BELLOWS COUPLINGS:


Precision Fairloc Miniature Bellows Couplings

AVAILABLE IN:

Materials: Brass, Bronze, Steel
Bore Size: 0.0625 in. (1mm) - 0.1250 in. (3mm)
Length: 0.853 in. (21.5mm) - 0.969 in. (24.5mm)







PRECISION FAIRLOC® BELLOWS COUPLINGS:


Precision Fairloc Bellows Couplings

AVAILABLE IN:

Materials: Brass, Bronze, Stainless Steel
Bore Size: 0.120 in.(3mm) - 0.375 in.(12mm)
Length: 0.92 in.(23.4mm) - 1.31 in.(33.3mm)









PRECISION FAIRLOC® NEO-FLEX COUPLINGS:


Precision Neo-Flex Couplings

AVAILABLE IN:

Materials: Stainless Steel, Neoprene
Bore Size: 0.12 in. (3mm) - 0.25 in. (6mm)
Length: 1.264 in. (33.1mm) - 2.650 in. (67.3mm)







PRECISION FAIRLOC® RIGID COUPLINGS:


Precision Rigid Couplings

AVAILABLE IN:

Materials: Stainless Steel
Bore Size: 0.0900 in. (2.5mm) - 0.2498 in. (12mm)
Length: 5/8 in. (19mm - 38mm)









COMMERCIAL FAIRLOC® ALUMINUM TIMING PULLEY:


Commercial Fairloc Aluminum Timing Pulleys

AVAILABLE IN:

Profile: MXL, GT®, HTD®
Pitch: 0.08 - 3.00









COMMERCIAL FAIRLOC® PLASTIC TIMING PULLEYS :


Commercial Fairloc Plastic Timing Pulleys

AVAILABLE IN:

Profile: XL, HTD®
Pitch: 1/5", 5mm, 5.08mm









PRECISION FAIRLOC® SHAFT REDUCERS | EXTENDERS:


Precision Shaft Reducers / Extenders

AVAILABLE IN:

Bore Size: 0.1200 in. (3mm) - 0.4998 in. (12mm)
Shaft Length: 1 in. (25mm - 30mm)









PRECISION FAIRLOC® SHAFT COLLARS:


Precision Fairloc Shaft Collars

AVAILABLE IN:

Bore Size: 0.12 in. (3mm) - 0.75 in. (20mm)
Outer Diameter: 0.433 in. (11mm) - 1.496 in. (38mm)









PRECISION FAIRLOC® GEAR & DIAL HUBS:


Precision Fairloc Gear and Dial Hubs

AVAILABLE IN:

Bore Size: 0.0900 in. (2.5mm) - 0.2498 in. (8mm)
Hub Diameter: 0.437 in. (11mm) - 0.530 in. (17mm)






BACK TO TOP