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)
Flex-Rigid O-Ring Seal Couplings
 
Used in pairs with a shaft to connect widely separated equipment.
Tandem - Flexible halves on floating shaft
Maximized bore capacity
 
Tandem - Rigid halves on floating shaft
Maximized offset capacity
 
Specifications/Dimensions
Coupling Size 1 1 1/2 2 2 1/2 3 3 1/2 4 4 1/2 5 5 1/2 6 7
Catalog No. 6908 108-1 158-1 208-1 258-1 308-1 358-1 408-1 458-1 508-1 558-1 608-1 708-1
Square Key
RIGID HUB-
MAX. BORE
Reduced Key		 Bore
Keyway		 2.25 2.75 3.50 4.38 5.0 5.75 6.50 7.38 8.25 9.25 10.00 11.25
1/2 x 1/4 5/8 x 5/16 7/8 x 7/16 1 x 1/2 1 1/2 x 5/8 1 1/2 x 3/4 1 3/4 x 7/8 1 3/4 x 7/8 2 x 1 2 x 1 2 x 1 3 x 1 1/2
Bore
Keyway		 2.44 2.88 3.75 4.50 5.19 6.00 7.00 7.88 8.75 9.50 10.25 12.25
5/8 x 7/16 3/4 x 1/4 7/8 x 5/16 1 x 3/8 1 1/4 x 7/16 1 1/2 x 1/2 1 3/4 x 3/4 2 x 3/4 2 x 3/4 2 x 3/4 2 1/2 x 7/8 3 x 1
Square Key
FLEX HUB-
MAX. BORE
Reduced Key		 Bore
Keyway		 1.63 2.13 2.75 3.25 4.00 4.50 5.38 6.00 6.63 7.50 8.13 9.63
3/8 x 3/16 1/2 x 1/4 5/8 x 5/16 7/8 x 7/16 1 x 1/2 1 x 1/2 1 1/4 x 5/8 1 1/2 x 5/8 1 3/4 x 7/8 1 3/4 x 7/8 2 x 1 2 x 1
Bore
Keyway		 1.88 2.25 3.13 3.63 4.38 5.13 5.75 6.50 7.50 8.13 9.00 11.13
1/2 x 3/16 5/8 x 7/32 3/4 x 1/4 7/8 x 5/16 1 x 3/8 1 1/4 x 7/16 1 1/2 x 1/2 1 3/4 x 3/4 1 3/4 x 3/4 2 x 3/4 2 x 3/4 2 1/2 x 7/8
Design
Rating		 HP/100 RPM 20.0 37.8 64.4 104 172 263 419 578 776 1150 1470 2200
Lb.-In. x 103 12.7 23.8 40.6 65.7 108 166 264 365 489 725 925 1390
Max. RPM 3600 3600 3600 3600 3600 3600 3290 2920 2630 2320 2120 1830
Weight-Lbs. Solid Hubs 10.5 18.5 38 64 86 140 207 280 409 539 659 1040
WR2-Lb.-In.2 18.6 65 152 366 675 1530 2880 4600 8870 13500 17500 37700
Dimensions
Inches		 A 4.56 6.00 7.00 8.38 9.44 11.00 12.50 13.63 15.31 16.75 18.00 20.75
B 3.41 3.94 4.94 6.16 7.28 8.50 9.63 10.78 12.22 13.69 14.97 17.88
CR .156 .156 .156 .188 .188 .219 .313 .348 .359 .359 .406 .500
E 1.69 1.94 2.44 3.03 3.59 4.19 4.75 5.31 6.03 6.91 7.41 8.69
ER 1.56 1.84 2.35 2.94 3.50 4.09 4.56 5.13 5.84 6.44 7.16 8.69
O 2.38 3.00 4.00 4.63 5.63 6.50 7.50 8.50 9.50 10.50 11.50 13.50
G 3.00 3.88 4.88 5.81 6.81 7.91 9.19 10.31 11.56 12.75 13.75 16.00
 
  1. Exposed bolt flanges furnished as standard.
  2. Shrouded bolt flanges furnished when specified:
    Use -2 suffix; e.g.: 6908-158-2. Unavailable for sizes 6 & 7.
  3. Design rating based on ± 1 1/2° misalignment per gear mesh.
  4. Offset capacity is dependent upon shaft length.
IMPORTANT - Check critical speed when used as a Floating Shaft.
SOLID SHAFT
                    4.7 x 106
N1 (1st Critical) = --------- x D > 1.5 max. operating speed.
                        L2
 NOTE:   Consult Renold for
certified dimensions.