FD-2

The FD series is an extremely compact differential unit that allows you to fine-tune the phase and timing during operation. The FD component set consists of four parts: the wave generator, flexspline, circular spline and dynamic spline. This unit must be integrated into the machine design.

Key Features:

Pancake component set
Ultra compact differential unit
Backlash is very small and unit requires no assembly adjustment
Very large reduction ratios between the adjusting shaft and the output, it allows precision position adjustment and requires little torque for adjusting the shaft
Easily installed into OEM equipment
Consists of only four parts and is mounted coaxially

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FD-25-2-GR

Rotational direction and reduction ratio

The section describes how to use the unit as differential unit.
(R indicates the reduction ratio value in the ratings table.)

Model Ordering Code

FD -	20 -	80 -	2 -	G -	SP
1	2	3	4	5	6

1.	Model	: FD series
2.	Size	: 20 , 25 , 32 , 40 , 50 , 65 , 80 , 100
3.	Reduction Ratio	: 78 , 80 , 96 , 100 , 104 , 120 , 128 , 131 , 132 , 157 , 158 , 160 , 194 , 200 , 208 , 242 , 258 , 260 , 320 (Note : Ratio size depends upon unit size.)
4.	Type	: 2 = Component type
5.	Specification	: G = Standard : GR = Robotic grade
6.	SP	: Customized Specification

List of Ratings

Rotational speed rpm		3500		2850		1750		1450		1150		960		870		750		600		500		CAD Downloads
Size	Gear Ratio	N.m	In.lb	N.m	In.lb	N.m.	In.lb	N.m	In.lb	N.m	In.lb	N.m	In.lb	N.m	In.lb	N.m	In.lb	N.m	In.lb	N.lm	In.lb	Component Type	Unit Type
20	80	29	257	30	266	30	266	30	266	30	266	30	266	30	266	30	266	30	266	30	266	PDF DXF	PDF DXF
	100	30	266	31	274	36	319	36	319	36	319	36	319	36	319	36	319	36	319	36	319
	128	31	274	34	301	42	372	43	381	43	381	43	381	43	381	43	381	43	381	43	381
	160	32	283	35	310	42	372	45	398	48	425	49	434	49	434	49	434	49	434	49	434
25	80	46	407	50	443	57	504	57	504	57	504	57	504	57	504	57	504	57	504	57	504	PDF DXF	PDF DXF
	100	49	434	53	469	67	593	67	593	79	699	79	699	79	699	79	699	79	699	79	699
	120	52	460	55	487	70	620	70	620	80	708	82	726	89	788	91	805	96	850	96	850
	160	54	478	57	504	71	628	73	646	80	708	83	735	89	788	92	814	98	867	108	956
	200	55	487	59	522	71	628	74	655	80	708	84	743	89	788	92	814	98	867	108	956
32	78	98	867	108	956	108	956	108	956	108	956	108	956	108	956	108	956	108	956	108	956	PDF DXF	PDF DXF
	100	108	956	118	1044	137	1212	147	1301	157	1389	157	1389	157	1389	157	1389	157	1389	157	1389
	131	108	956	118	1044	137	1212	157	1389	167	1478	176	1558	176	1558	196	1735	206	1823	206	1823
	157	108	956	118	1044	137	1212	157	1389	167	1478	176	1558	176	1558	196	1735	206	1823	216	1912
	200	108	956	118	1044	137	1212	157	1389	167	1478	176	1558	176	1558	196	1735	206	1823	216	1912
	260	108	956	118	1044	137	1212	157	1389	167	1478	176	1558	176	1558	196	1735	206	1823	216	1912
40	80	196	1735	196	1735	196	1735	196	1735	196	1735	196	1735	196	1735	196	1735	196	1735	196	1735	PDF DXF	PDF DXF
	100	235	2080	245	2168	265	2345	265	2345	265	2345	265	2345	265	2345	265	2345	265	2345	265	2345
	128	235	2080	245	2168	294	2602	314	2779	343	3036	363	3213	372	3292	372	3292	372	3292	372	3292
	160	235	2080	245	2168	294	2602	314	2779	343	3036	363	3213	372	3292	392	3469	421	3726	451	3991
	200	235	2080	245	2168	294	2602	314	2779	343	3036	363	3213	372	3292	392	3469	421	3726	451	3991
	258	235	2080	245	2168	294	2602	314	2779	343	3036	363	3213	372	3292	392	3469	421	3726	451	3991
50	80	353	3124	353	3124	353	3124	353	3124	353	3124	353	3124	353	3124	353	3124	353	3124	353	3124	PDF DXF	PDF DXF
	100	441	3903	470	4160	549	4859	559	4947	559	4947	559	4947	559	4947	559	4947	559	4947	559	4947
	120	441	3903	470	4160	549	4859	588	5204	637	5637	666	5894	666	5894	666	5894	666	5894	666	5894
	160	441	3903	470	4160	549	4859	588	5204	637	5637	676	5983	696	6160	754	6673	794	7027	843	7461
	200	441	3903	470	4160	549	4859	588	5204	637	5637	676	5983	696	6160	754	6673	794	7027	843	7461
	242	441	3903	470	4160	549	4859	588	5204	637	5637	676	5983	696	6160	754	6673	794	7027	843	7461
65	78	-	-	-	-	764	6761	764	6761	764	6761	764	6761	764	6761	764	6761	764	6761	764	6761	PDF DXF	PDF DXF
	104	-	-	-	-	1030	9116	1100	9735	1180	10443	1190	10532	1190	10532	1190	10532	1190	10532	1190	10532
	132	-	-	-	-	1030	9116	1100	9735	1180	10443	1250	11063	1290	11417	1380	12213	1460	12921	1570	13895
	158	-	-	-	-	1030	9116	1100	9735	1180	10443	1250	11063	1290	11417	1380	12213	1460	12921	1570	13895
	208	-	-	-	-	1030	9116	1100	9735	1180	10443	1250	11063	1290	11417	1380	12213	1460	12921	1570	13895
	260	-	-	-	-	1030	9116	1100	9735	1180	10443	1250	11063	1290	11417	1380	12213	1460	12921	1570	13895
80	80	-	-	-	-	1370	12125	1370	12125	1370	12125	1370	12125	1370	12125	1370	12125	1370	12125	1370	12125	PDF DXF	PDF DXF
	96	-	-	-	-	1800	15930	1800	15930	1800	15930	1800	15930	1800	15930	1800	15930	1800	15930	1800	15930
	128	-	-	-	-	2040	18054	2180	19293	2340	20709	2490	22037	2570	22745	2710	23984	2710	23984	2710	23984
	160	-	-	-	-	2040	18054	2180	19293	2340	20709	2490	22037	2570	22745	2740	24249	2950	26108	3130	27701
	194	-	-	-	-	2040	18054	2180	19293	2340	20709	2490	22037	2570	22745	2740	24249	2950	26108	3130	27701
	258	-	-	-	-	2040	18054	2180	19293	2340	20709	2490	22037	2570	22745	2740	24249	2950	26108	3130	27701
	320	-	-	-	-	2040	18054	2180	19293	2340	20709	2490	22037	2570	22745	2740	24249	2950	26108	3130	27701
100	80	-	-	-	-	2470	21860	2470	21860	2470	21860	2470	21860	2470	21860	2740	24249	2470	21860	2470	21860	PDF DXF	PDF DXF
	100	-	-	-	-	3720	32922	3720	32922	3720	32922	3720	32922	3720	32922	3720	32922	3720	32922	3720	32922
	120	-	-	-	-	3720	32922	3980	35223	4280	37878	4560	40356	4710	41684	4740	41949	4740	41949	4740	41949
	160	-	-	-	-	3720	32922	3980	35223	4280	37878	4560	40356	4710	41684	5010	44339	5390	47702	5720	50622
	200	-	-	-	-	3720	32922	3980	35223	4280	37878	4560	40356	4710	41684	5010	44339	5390	47702	5720	50622
	242	-	-	-	-	3720	32922	3980	35223	4280	37878	4560	40356	4710	41684	5010	44339	5390	47702	5720	50622
	320	-	-	-	-	3720	32922	3980	35223	4280	37878	4560	40356	4710	41684	5010	44339	5390	47702	5720	50622

Product Drawing

Unit type (FD-0)

Unit: mm

Symbol /Size	20	25	32	40	50	65	80	100
ØA	85	95	120	145	185	235	290	360
ØB(h7)	52	65	85	100	125	140	180	210
ØC	20	30	40	50	60	70	90	110
D	73	81	95	113	132	147	178	212
Mass(kg)	2.0	2.6	5.0	8.3	17	34	59	118

Component type (FD-2)

Unit: mm

Symbol /Size	20	25	32	40	50	65	80	100
ØA(g7)	70	85	110	135	170	215	265	330
B	12	14	18	21	26	35	41	50
C	1	1	1	1	1	1	1	1
D	25	29	37	43	53	71	83	101
Mass(kg)	0.6	1.0	2.0	3.6	7.2	14	26	48

Please confirm dimensions and specifications with the confirmation drawing issued by Harmonic Drive LLC.

Differential Gear

FD-2

Key Features:

FD-25-2-GR

Rotational direction and reduction ratio

Model Ordering Code

List of Ratings

Product Drawing

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