Brake Products, Inc.   16751 Hilltop Park Place
  Chagrin Falls, Ohio 44023
  Phone: (440) 543-7962
  Fax:     (440) 543-7963
  Web:   www.brakeproducts.com
  Email: sales@brakeproducts.com
Supplier of Industrial Brake Parts Since 1985
• Why Renold Ajax?
• Features
• Full-Flex Metal Seal Couplings
• Flex-Rigid Metal Seal Couplings
• Mill Motor Metal Seal Couplings
• Flange and Bore Specifications for Metal
  and O-Ring Seal Couplings
• Typical Custom Designed Couplings
• Full-Flex O-Ring Seal Couplings
• Flex-Rigid O-Ring Seal Couplings
• Mill Motor O-Ring Seal Couplings
• Heavy Duty Couplings
• Full-Flex Heavy Duty O-Ring Seal Couplings
• Flex-Rigid Heavy Duty O-Ring Seal Couplings
 		  • Standard Extended Shaft Gaps
• Installation Information Standard and Heavy Duty Sizes
• Installation, Maintenance, Lubrication
• D Series Couplings High Misalignment, Full-Flex
• D Series Couplings High Misalignment, Flex-Rigid
• DS Series Spindle Couplings
• D Series and DS Gear Tooth Design Ratings and
  Engineering Layout Details
• Ajax Pin and Bush Couplings
• Cast Iron Couplings Forged Steel Couplings
• Service Parts for Ajax Pin and Bush Couplings
• Special Pin and Bush Couplings
• Download brochure in Adobe Acrobat® format (1.28MB)
Installation, Maintenance, Lubrication
 
Lubrication is essential
If you are getting short life from your couplings, the first thing to check is your lubricant. Proper lubrication is essential to minimize heat generation and assist in heat dissipation when operating in a misalignment condition. Application experience shows that couplings almost always fail from overheating. Most commercial lubricants are developed for high-volume applications such as bearings and do not posses sufficient performance characteristics for coupling applications. Gear type couplings require base oils that have naturally high viscosity index, excellent extreme pressure qualities, water resistance and adhesiveness. To select an appropriate lubricant, check the technical data specifications for the following:
  • The grease should be compounded with a minimum soap base made of select high-quality thickeners, such as aluminum complex for best performance.
  • The grease should, at a minimum, include additives for extreme pressure, rust prevention, adhesiveness, high load carrying capability, boundary lubrication and water resistance.
  • Base oils should possess natural viscosity indexes above 90. The viscosity of the base oils should be no less than 80 SUS at 100°C. The minimum flash point of the base oil should be 475°F. Products containing synthetic base oils should be of the Polyalphaolefin (PAO) synthetic base oil family.
  • The grease should have good low temperature pumping characteristics and should require no more than 1,500 psi applied pressure @ 0°F on the Lincoln venometer test. The grease should not require heating.
  • Molybdenum disulfide, graphite, PTFE and antinomy are excellent additives for extreme pressure and boundary lubrication but will separate out at high rpm. For shaft speeds over 1,500 rpm, a lubricant void of solids should be used, with the exception of Molybdenum Didutyldithiocarbamate. This is a synthetic form of Molybdenum that is solubilized and will not separate or centrifuge out of lubricants.
  If the lubricant you are using does not appear on the spindle manufacturer's recommended list, refer to the previous information for minimum grease performance specifications or provide Renold with the specifications of the grease you prefer for evaluation of its suitability to your application. Renold Ajax recommends the following lubricants:
 
High Speed - above 1,500 rpm
Schaeffer Mfg. Co. - #248R Moly Syngard 2000 E.P. #2
Viscosity Oil Co. - Viscor 1429 EP-1
Nuodex Inc. - Anderol 786
 
Medium Speed - between 800 and 1,500 rpm
Schaeffer Mfg. Co. - #279R Spindle Compound
Mobil - Mobilux EP111
Texaco - Multifak EP-2
Amoco - CPLG Grease
 
Low Speed - below 800 rpm
Schaeffer Mfg. Co. - #279R Spindle Compound
Schaeffer Mfg. Co. - #00SR Silver Streak Special
Mobil - Mobilux EP111
Texaco - Multifak EP-2
Amoco - CPLG Grease
 
Frequency
Gear couplings should be lubricated a minimum of every six months or sooner if the application requires. When installing a couplings, be sure to also hand-pack the teeth with grease prior to greasing by normal methods to ensure the teeth will not run dry for the first few minutes of operation until the lubricant works its way to the gear mesh. If operating temperatures of coupling sleeves exceed 130°F/55°C, check the lube level, misalignment and operating torque.
 
When possible, add lubricant until fresh lubricant appears at the discharge. This purge method keeps lubricant properties at their best and contaminants to a minimum.
Metal Seal O-Ring Seal High Misalignment
 
  1. Inspect and clean all the parts.
  2. Apply a light coat of selected lubricant to gear teeth (if O-Ring style, coat o-Ring and seal hub diameter).
  3. Place sleeve ring gear over shaft.
  4. Coat shaft with anti-galling compound. Insert key in keyway and check to assure a snug side-to-side fit.
  5. Heat hubs in oil or oven to approximately 300°F (148°C); do not exceed 350°F (176°C). Slip hubs onto shaft to correct position and allow to cool. (Clearance fits are only used for light duty applications and have set screws. Tighten firmly.)
  6. Align equipment, using straight-edge and feeler gauge or dial indicator. Alignments and shaft gap must be within design limits of coupling and should be best economically possible.
  7. Coat coupling gear teeth with selected lubricant.
  8. Pull sleeve ring gear over hub, engaging gear teeth.
  9. Inspect flange gasket for damage. Clean flanges and insert gasket between flanges. (If gasket is damaged, use Permatex or equal.)
  10. Draw flanges together, align bolt holes. Insert bolts and tighten with lockwasher and nut.
  11. Position couplings so two (2) lube holes, 180° apart, are horizontal. Remove these lube plugs. Pump lubricant into one hole until discharged from hole at 180°. Replace and tighten plugs.
    Note: In case of floating shaft, spacer or similar type design, each end must be lubricated.
  12. Recheck all mechanical connections to make certain they are tight.
INSTALL COUPLING GUARD.
 
WARNING
Rotating equipment must be provided with a suitable guard before operating or injury may result. Check applicable code.
Heavy Duty