Federal Flexible Couplings

Reduces Noise - Absorbs Vibration - Prevents Electrolysis fedcoup1.gif (81349 bytes)

Important facts about FEDERAL FLEXIBLE COUPLINGS
Protects transmission thrust bearings and seals from stress and
wear due to shaft misalignment.
Handles parallel and angular misalignment.
No metal to metal contact; prevents shaft rumble from reaching
engine.
No lubrication or maintenance required.
Easily installed; no shaft shortening or change of shaft location.
Neoprene Rubber trunnions transmit thrust and torsional loads.
Trunnions easily and economically replaced in case of damage.
Dampens oscillating shaft vibration in diesel installations.
Allows engines on rubber mounts to float free.
Engines on rubber mounts move ahead and jackknife under thrust
of propeller shaft; FEDERAL flexible couplings absorb this and
reduce vibration at high speeds.
Engine can be aligned without special tools.

A Federal Flexible Coupling should be used between the propeller shaft and the engine of your boat to absorb the misalignment caused by structural distortion of the hull in a seaway.
It is particularly important that flexible couplings be used with any motor that has rubber engine mountings to allow the engine to float freely and to prevent distortion of the shaft.
There is no metal to metal contact. This helps to reduce electrolysis by isolating the iron parts of the engine from the bronze shafting and propeller. Grounding straps are available for boats with bonded electrolytic systems.

The Federal coupling may be easily installed at any time; no alterations are necessary to either the engine or the propeller shaft. Simply line up the engine, using the existing rigid couplings, then remove the rigid coupling from the propeller shaft and put the Federal flexible coupling on in its place. There need be no change in the position of the propeller.

The Federal Flexible Coupling will absorb both thrust and torsional loads. The pins and rubber bushings are replaceable in case of damage. Couplings with standard bore and keyways are available for most gasoline engines with ratings not exceeding 500 Horsepower, diesel engines to 900 foot pounds torque. All necessary bolts, nuts, and set screws are furnished.

Partial list of Federal Couplings for current models of diesel and gasoline engines

Albin	NO.	Flagship (cont.)	NO.	Capitol Gears	NO.
AD-2	438	Models w/ 4" dia. flanges	43A	Model EF & EFH straight drive	41
Barr, Osco, Perkins Diesels 67-		Models w/ 5" dia. flanges	43B	Model EF & EFH red. drive	63B
4 cyl. w/ Paragon transmissions	41A	Farymann Diesel		Model 2HED, EC-8900 All drives	63B
4 cyl. w/ Warner transmissions	43A	Models w/ 4" flanges	440	Model 2HE-10, 200 Medium drives	63
6 cyl. w/ Paragon transmissions	41B	Models w/ 4 1/2" flanges	441	Model 2HE-10, 200 Heavy drives	65
6 cyl. w/ Warner transmissions	43B	Gray Marine		Model 4HE-10, 200	65
Challenger, Commander, Conquerer, Crusader, Mercruiser, OMC, Pleasure Craft, Waukesha		All models w/ Warner transmissions		Model 2HE-10, 700	72E
All models w/ Warner gears		Models w/ 4" dia. flanges	43A	Model HYC-690	72E
Models w/ 4" dia. flanges	43A	Models w/ 5" dia. flanges	43B	Paragon Gears
Models w/ 5" dia. flanges	43B	Lehman Power		OXK Straight drive	31
Crusader V-drives	43A	w/ Paragon P. gears	41B	Model 1XE, 2XE, 3XE, 35XE Straight drive	41
Chris Craft		w/ Paragon PL gears	42B	Model HA, HB, HF Straight drive	41
283, 327 cu. in. V-8 Straight drives thru '67	41	w/ Warner gears	43B	Model G, P w/ 4" flange	41A
283, 327 cu. in. V-8 1 1/2 -- 1 Red. drives thru '67	44	w/ Newage gears	65B	Model P w/ 5" flange	41B
283, 327 cu. in. V-8 2 -- 1 Red. drives thru '67	46	Palmer and International Harvester		Model P-40, 2 1/2 -- 1, 3 -- 1 red.	41H
283, 327 cu. in. V-8 2 1/2 -- 1 Red. drives thru '67	46	Models w/ Paragon (see Paragon)		Model PL, PM, PC	42B
283, 327 cu. in. V-8 Manuals thru '68, same as '67		All models w/ Warner transmissions		Model PL, PM, PC 2 1/2--1, 3--1 red.	42BH
227, 350 cu. in. V-8 '68 w/ 4" flanges	41A	Models w/ 4" dia. flanges	43A	Model RO, SA Red. drives	41
227, 350 cu. in. V-8 '68 w/ 5" flanges	41B	Models w/ 5" dia. flanges	43B	Model RA Red. drives	44
430, 431 cu. in. V-8 Straight drives	46A	Pathfinder		Model RB Red. drives	46
430, 431 cu. in. V-8 1 1/2--1 Red. drives	46	All models	43A	Model RC Red. drives	66
430, 431 cu. in. V-8 2 -- 1 Red. drives	66	SAAB		Warner Gears & V-Drives
430, 431 cu. in. V-8 2 1/2--1 Red. drives	66	20 H.P. Straight drive	436	Models w/ 4" dia. flanges	43A
430, 431 cu. in. V-8 3 -- 1 Red. drives	66	10 H.P. Reduction drive	435	Models w/ 5" dia. flanges	43B
427 cu. in. V-8 thru '67 same as 430 cu. in.		Universal		Models w/ 5" dia. flanges 2 1/2--1, 3--1 red.	43H
427 cu. in. V-8 '68 -- all drives	41B	Model UJ, Atomic 2, 4	32	Models w/ 5 3/4" dia. flanges	65
Chrysler		Model UJR	41	Hurth Gears
All models w/ Chrysler transmissions		Models w/ Hurth or Warner trans.	43A	Models HBW -- 100, 200 (all 4 bolt)	43A
Str. drive and red.	61A	Volvo-Penta		Models -- HBW 360, 400	43B
All models w/ Paragon transmissions		Models w/ 95mm flanges	434	General Motors Diesel
Straight drives	41	2F-50-A & TMD-404	43B	Model 6-71 w/ Allison transmission	72E
1 1/2 -- 1 red. drives	41	Westerbeke		All models w/ Warner transmissions
2 -- 1 red. drives	46	4-60, 91, 107 Manual straight drive	31	Models w/ 4" dia. flanges	43A
2 1/2 -- 1 red. drives	46	4-60, 91, 107 Manual red. drive	41	Models w/ 5" dia. flanges	43B
3 -- 1 red. drives	46	Models w/ Paragon P trans. 4"	41A	Diesels w/ Capitol Gears
All models w/ Warner transmissions		Models w/ Paragon P trans. 5"	41B	Model 2HE-10, 200 Medium duty	63
Models w/ 4" dia. flanges	43A	Models w/ Paragon PL, PM trans.	42B	Model 2HE-10, 200 Heavy duty	65
Models w/ 5" dia. flanges	43B	Models w/ Warner trans. 4"	43A	Model 2HE-10, 700 or HYC-6900	72E
Flagship		Models w/ Paragon Navy trans.	63	Model 2HE-12, 400	75E
All models w/ Paragon transmissions '67-	41A	Models w/ Sailor trans.	41	Diesels w/ Twin Disc Gears
All models w/ Capitol transmissions		Yanmar Diesel		Model MG-502	63
Straight drives	41	Models w/ 95mm flanges	47	Model 61, MG-506, 507 w/ 5 3/4" couplings	651
Reduction drives	63B	Models w/ 125mm flanges	48	Model MG-506, 507, 508, 509 w/ 7-1/4" couplings	721E
All models w/ Warner transmissions		Model 4LH	43K

NOTE: 123 651 same as 123 65 but with 5/8" bolts. 123 721E same as 123 72E but with 3/4" bolts. Blanks available for foreign transmissions and metric bores. Metric bores without keyways available in models with metric dimensions. INFORMATION REQUIRED FOR YOUR ORDER* Choose the proper model from the chart and specify shaft size. If in doubt, specify make and model of engine and reverse gear; reduction ration, if any, and shaft size. Blank models can be supplied for local machining to size. If engine, or transmission are not listed, please advise: No. of bolt holes, and diameter; bolt circle diameter (dimension D); male or female locating ring, and dimension (A or B); shaft and keyway size. The Dual-Flex Engine Mount is a true flexible engine mounting. There is no metal-to-metal contact between the supporting and mounting members. The mount has a 1" vertical adjustment. The rubber element of the mount will withstand temperature extremes and exposure to salt atmosphere, oil and grease. The special design and construction of the dual-Flex Engine Mount gives a soft cushioning effect under normal loads. As loads increase from normal the resistance of the mount increases very rapidly with a small amount of deflection. There is no metal-to-metal contact at any point over the weight range potential thereby eliminating any danger of excessive impact.
123 DF 238 Series Heavy duty mounting for engines in the 1,500 lb. to 2,200 lb. range. 3/4 -- 16 threaded stud is equipped with two hex jam nuts. 123 DF 200 Series Aluminum base cast with two 1/2" slotted mounting holes, for either 1/2" bolts or lags screws, on 5 inch centers. Slotted holes assist in installation assembly of engine. All steel parts zinc plated.


	Engine Weight	Model No.
	860-1100 lbs.	#200
	1500-2200 lbs.	#238


Model 123-200			Model 123-238

Model	A	B	C	D	E	F	G	H	Bolt Holes	Shaft Size	Wt.
123 31	1-1/2”	1-3/4”	3/32”	2-1/2”	2-11/16”	4-3/4”	1-3/4”	1-7/8”	3 @ 25/64”	3/4” to 1-1/8”	10#
123 32	1-7/8”			2-3/4”	2-15/16”	4-3/4”	1-3/4”	2-1/8”	3 @ 25/64”	3/4” to 1-1/8”	12#
123 41	1-3/4”	2”	3/32”	3-1/4”	2-11/16”	5-1/4”	2-3/8”	1-7/8”	4 @ 25/64”	7/8” to 1-3/8”	12#
123 41A	2-1/4”	2-5/8”	3/32”	3-1/4”	2-11/16”	5-1/4”	2-3/8”	1-7/8”	4 @ 25/64”	7/8” to 1-3/8”	12#
123 41B	2-1/2”	2-3/4”	3/32”	4-1/8”	2-11/16”	5-3/4”	2-7/8”	1-7/8”	4 @ 25/64”	1” to 1-3/4”	15#
123 41H	2-1/2”	2-3/4”	3/32”	4-1/8”	3-13/16”	6”	3-1/8”	1-7/8”	4 @ 25/64”	1-1/2” to 2”	17#
123 42B	2-5/8”	2-7/8”	3/32”	4-1/8”	2-11/16”	5-3/4”	2-7/8”	1-7/8”	4 @ 15/32”	1” to 1-3/4”	15#
123 42BH	2-5/8”	2-7/8”	3/32”	4-1/8”	3-13/16”	6”	3-1/8”	1-7/8”	4 @ 15/32”	1-1/2” to 2”	17#
123 43A	2-1/4”	2-1/2”	3/32”	3-1/4”	2-11/16”	5-1/4”	2-3/8”	1-7/8”	4 @ 25/64”	7/8” to 1-3/8”	12#
123 434	60 mm.			80 mm.	3-7/16”	5-1/4”	2-3/8”	2-3/8”	4 @ M10	7/8” to 1-3/8”	14#
123 435	54 mm.	60 mm.	3 mm.	90 mm.	3-7/16”	5-1/4”	2-3/8”	2-1/4”	4 @ M10	7/8” to 1-3/8”	12#
123 436	34 mm.	40 mm.	3 mm.	75 mm.	2-11/16”	4-3/4”	1-3/4”	2-1/4”	4 @ 11/32”	3/4” to 1-1/8”	12#
123 438	40 mm.	50 mm.	3/32”	3”	3-7/16”	4-3/4”	1-3/4”	2-5/8”	2 @ 25/64”	3/4” to 1-1/8”	12#
123 439	30 mm.	36 mm.	3 mm.	65 mm.	2-11/16”	4-3/4”	1-3/4”	1-7/8”	4 @ 13/32”	3/4” to 1-1/8”	10#
123 440	36 mm.	45 mm.	3 mm.	75 mm.	2-11/16”	4-3/4”	1-3/4”	1-7/8”	4 @ M10	3/4” to 1-1/8”	10#
123 441	39 mm.	45 mm.	3 mm.	85 mm.	2-11/16”	5-1/4”	2-3/8”	1-7/8”	4 @ 15/32”	3/4” to 1-1/8”	12#
123 43B	2-1/4”	2-1/2”	3/32”	4-1/4”	2-11/16”	5-3/4”	2-7/8”	1-7/8”	4 @ 15/32”	1” to 1-3/4”	15#
123 43H	2-1/4”	2-1/2”	3/32”	4-1/4”	3-13/16”	6”	3-1/8”	1-7/8”	4 @ 15/32”	1-1/2” to 2”	19#
123 43K	2-1/4”	2-1/2”	3/32”	4-1/4”	2-13/16”	5-3/4”	2-7/8”	2”	4 @ 15/32”	1” to 1-3/4”	16#
123 44	2-3/8”	2-5/8”	3/32”	3-3/4”	2-11/16”	5-3/4”	2-7/8”	1-7/8”	4 @ 25/64”	1” to 1-3/4”	15#
123 46	2-7/8”	3-1/8”	3/32”	4-5/8”	2-11/16”	5-3/4”	2-7/8”	1-7/8”	4 @ 25/64”	1” to 1-3/4”	15#
123 47	44 mm.	50 mm.	3 mm.	78 mm.	2-3/4”	4-3/4”	1-3/4”	2”	4 @ 13/32”	3/4” to 1-1/8”	12#
123 48	56 mm.	65 mm.	3 mm.	100 mm.	2-3/4”	5-1/4”	2-3/8”	2”	4 @ 13/32”	7/8” to 1-3/8”	12#
123 61A	2”			4”	3-15/16”	5-3/4”	2-7/8”	2-5/8”	6 @ 15/32”	1” to 1-3/4”	18#
123 63	2-1/2”			3-7/8”	2-13/16”	5-3/4”	2-7/8”	2”	6 @ 15/32”	1” to 1-3/4”	15#
123 65*	3”			4-3/4”	3-15/16”	6-1/4”	3-1/8”	2”	6 @ 17/32”	1-3/8” to 2”	19#
123 65B	2-3/4”	3”	3/32”	4-3/4”	3-13/16”	6-1/4”	3-1/8”	1-7/8”	6 @ 15/32”	1-3/8” to 2”	19#
123 66	3”	3-1/4”	3/32”	5-3/8”	3-13/16”	6-1/4”	3-1/8”	1-7/8”	6 @ 15/32”	1-3/8” to 2”	19#
123 72E*	3-3/4”			6”	4-15/16”	7-1/4”	3-3/4”	2”	6 @ 21/32”	1-1/2” to 2-1/2”	29#
123 75E	3”			4-3/4”	4-15/16”	7-1/4”	3-3/4”	2”	6 @ 17/32”	1-1/2” to 2-1/2”	29#

Part No.	Description
123 6424	Trunions
123 6426	Trunions (E-Series)
123 3458	Spider pins (7/8” across flats)
123 3478	Spider pins (E-Series)
123 GS	Grounding Straps