Home/
Lifting Equipment/
Screwjacks, Linear Actuators, Rotary Unions and ACME Ball Screws and Nuts/
Duff Norton Screwjacks/
Stainless Steel Machine Screwjack Actuator, 2t to 100t

Stainless Steel Machine Screwjack Actuator, 2t to 100t

Stainless Screwjack Actuator.

Model:

SSMS-4050

These Stainless Steel Screwjack Actuators are specifically designed for harsh environments, in standard and special configurations for loads up to 100 tons.

They incorporate all of the same features as a standard machine screw actuator, but can be used in severe environments where other materials are inadequate.

All of the exposed surfaces are made of 316 stainless steel including the lifting screw, housing, shell cap, worm and dust guard.

Corrosion resistant.
Stainless Steel hardware.
Sealed gear cavity to keep contaminants out.
Anti-backlash and Metric machine screw actuators are also available.

Stainless Steel Machine Screw Actuator Dimensions

17 - 4 PH Worm Cap.(Tons)	316 SS Worm Capacity (tons)		A	B	C	D	E+/-.005	F	G	H	J+.000/-.002	K	L	M	N
17 - 4 PH Worm Cap.(Tons)	Sustaining	Operating	A	B	C	D	E+/-.005	F	G	H	J+.000/-.002	K	L	M	N
2 (1800 series)	2	.67	5.50	4.56	Travel	.50	1.750	1.66	4.25	.50	.500	3.00	6.00	1.00	2.00
2 (9000 series)	2	.67	5.50	4.56	Travel	.50	1.750	1.66	4.25	.50	.500	1.56	3.13	1.93	5.25
5	5	1.66	7.50	5.88	Travel	.50	2.250	2.38	4.50	.60	.749	2.25	4.50	2.25	6.50
10	10	3.33	7.75	5.62	Travel +3/8	.50	2.250	2.88	5.75	.94	1.000	2.88	5.75	2.00	7.00
15	15	5.00	8.00	6.31	Travel + 9/16	.63	2.750	2.88	5.75	.94	1.000	3.00	6.00	2.50	7.50
20	20	6.66	10.25	7.13	Travel + 1/2	.75	3.250	3.50	5.75	.94	1.000	3.00	6.00	3.00	8.75
25	25	8.33	11.75	9.75	Travel + 1/4	1.00	4.000	4.50	8.50	.94	1.375	3.75	7.50	3.75	11.00
35	35	11.66	12.50	9.56	Travel + 1/4	1.25	4.000	4.50	10.50	1.31	1.375	3.75	7.50	4.50	12.50
50 (1800 series)	50	16.66	13.50	11.38	Travel + 5/8	1.25	4.750	5.63	11.25	1.25	1.500	8.00	16.00	3.00	6.00
100	100	33.33	24.00	18.50	Travel + 1/2	1.50	6.000	7.00	14.00	2.94	1.750	10.00	20.00	5.75	16.26

P	Q	R	S	T	U	V	W	X	Y	Z	a	b	Keyseat	Lifting Screw (dia./Pitch)
3.50	7.00	1.75	3.50	3.50	7.00	1.12	1.702 +.003/-.000	.41	3.00	.41	.75	.5	.125 x .060 x 1.00 LG.	1.00 x .250
2.06	4.13	2.42	6.25	3.50	7.00	1.12	1.702 +.003/-.000	.41	3.00	.41	.88	.38	.125 x .060 x 1.00 LG.	1.00 x .250
3.00	6.00	3.00	8.00	4.50	9.00	1.50	2.188 +.002/-.000	.69	3.00	.69	1.19	.75	.188 x .094 x 1.25 LG.	1.50 x .375
3.75	7.50	2.88	8.75	5.50	11.00	1.80	2.598 +.003/-.000	.81	4.13	.81	1.31	.88	.250 x .125 x 1.50 LG.	2.00 x .500
3.88	7.75	3.38	9.25	5.50	11.00	1.80	2.598 +.003/-.000	.81	4.13	.81	1.38	.88	.250 x .125 x 1.50 LG.	2.25 x .500
4.13	8.25	4.13	11.00	5.50	11.00	1.50	2.598 +.003/-.000	.81	4.13	1.12	1.75	1.13	.250 x .125 x 1.50 LG.	2.50 x .500
5.13	10.25	5.13	13.75	7.00	14.00	2.30	3.750 +.006/-.000	1.06	6.00	1.38	2.13	1.38	.313 x .156 x 2.00 LG.	3.00 x .666
5.13	10.25	6.00	15.50	7.00	14.00	2.10	3.750 +.006/-.000	1.62	7.75	1.62	2.63	1.38	.313 x .156 x 2.00 LG.	3.75 x .666
9.88	19.75	4.88	9.75	11.00	22.00	4.40	5.313 +.003/-.000	1.38	8.75	1.88	3.25	1.88	.375 x .188 x 2.25 LG.	4.50 x .666
12.25	24.50	8.00	20.75	11.50	23.00	3.40	7.500 +.003/-.000	1.88	11.00	1.88	3.50	2.25	.500 x .250 x 3.00 LG.	6.00 x .750

Capacity	A**	B**	C	D	E	F**	G**	H	J
2 Ton SMS	5 1/4	1 3/4	3/4	13/32	3/4	6	2 1/2	1 1/8	3/4"-10UNC-2A
5 Ton SMS	7	2 1/2	1	21/32	1	8	2 1/2	1 1/8	1"-8UNC-2A
10 Ton SMS	7 1/2	3	1 1/4	25/32	1 1/4	9 1/4	4 1/4	1 5/8	1 1/2"-6UNC-2A
15 Ton SMS	8 1/2	3	1 1/4	29/32	1 1/2	10 1/4	4 1/4	2	1 3/4"-5UNC-2A
20 Ton SMS	10	3 1/2	1 1/2	1 1/32	1 3/4	12 1/2	5	2 1/4	2"-4 1/2UNC-2A
25 Ton SMS	12	4	1 3/4	1 9/32	2 1/4	14 1/2	5 3/4	3 1/4	2 1/2"4-UNC-2A
35 Ton SMS	13	5	2	1 17/32	2 1/2	15 1/2	7	3 3/4	3 1/4"-4UNC-2A
50 Ton SMS	15	5 1/2	2 1/2	1 21/32	3 1/4	18	8	4 1/4	4"4UNC-2A
100 Ton SMS	24	9	3	2 17/32	4 1/4	25	12	5	1 1/2"-12UNC-2A

Capacity	M	N**	P**	R	S	T	U	V
2 Ton SMS	1	5 1/4	1 3/4	4 1/4	7/16	4	13/32	3
5 Ton SMS	1 1/2	7 1/2	2 1/2	4 1/2	5/8	4	11/16	3
10 Ton SMS	2	7 3/4	2 3/4	5 3/4	15/16	4	13/16	4 1/8
15 Ton SMS	2 1/4	8 1/2	2 3/4	5 3/4	15/16	4	13/16	4 1/8
20 Ton SMS	2 1/2	10 1/4	3	5 3/4	15/16	4	13/16	4 1/8
25 Ton SMS	3	11 3/4	3	8 1/2	15/16	4	1 1/16	6
35 Ton SMS	3 3/4	12 1/2	4	10 1/2	1 5/16	4	1 5/8	7 3/4
50 Ton SMS	4 1/2	13 1/2	3 1/2	11 1/4	1 1/4	4	1 3/8	8 3/4
100 Ton SMS	6	24	12	14	2 15/16	6	1 7/8	11

Stainless Steel Actuator Performance Specifications

Capacity (tons) - 17-4PH Worm		2	5	10	15	20	25	35	50	100
Capacity (tons) - 316 SS Worm		0.67	1.66	3.33	5.00	6.66	8.33	11.66	16.66	33.33
Lifting Screw	Diameter (in)	1	1 1/2	2	2 1/4	2 1/2	3	3 3/4	4 1/2	6
	Pitch (in)	0.250	0.375	0.500	0.500	0.500	0.666	0.666	0.666	0.750
	Type	ACME	ACME	ACME	ACME	ACME	ACME	ACME	Mod.Sq.	Mod.Sq.
Worm Gear Ratios	Standard	6:1	6:1	8:1	8:1	8:1	10 2/3:1	10 2/3:1	10 2/3:1	12:1
	Optional Number 1	24:1	24:1	24:1	24:1	24:1	32:1	32:1	32:1	36:1
	Optional Number 2	12:1	12:1	-	-	-	-	-	-	-
Turns of Worm for 1" Raise	Standard	24	16	16	16	16	16	16	16	16
	Optional Number 1	96	64	48	48	48	48	48	48	48
	Optional Number 2	48	32	-	-	-	-	-	-	-
Worm Torque at No Load (in-lb)	Standard	5	10	20	20	30	40	50	100	200
	Optional Number 1	5	10	20	20	30	40	50	100	200
	Optional Number 2	5	10	-	-	-	-	-	-	-
Maximum Horsepower per Actuator	Standard	2	4	5	5	5	8	8	15	25
	Optional Number 1	1/2	3/4	1 1/2	1 1/2	1 1/2	2 1/2	2 1/2	6	11
	Optional Number 2	3/4	2	-	-	-	-	-	-	-
Worm Torque at Full Load (in-lb) 17-4PH Worm	Standard	120	450	750	1430	2050	2700	4000	7500	16000
	Optional Number 1	50	185	400	820	1170	1700	2400	4200	8600
	Optional Number 2	75	275	-	-	-	-	-	-	-
Worm Torque at Full Load (in-lb) 316SS Worm	Standard	43	156	263	490	703	926	1366	2566	5466
	Optional Number 1	20	68	147	287	410	593	833	1466	3000
	Optional Number 2	28	98	-	-	-	-	-	-	-
Efficiency Rating (%)	Standard	20.4	21.2	25.2	20.3	18.9	17.9	17.0	12.9	12.1
	Optional Number 1	11.1	12.1	15.1	11.6	10.8	9.3	9.3	7.5	7.4
	Optional Number 2	15.6	16.8	-	-	-	-	-	-	-
Weight with 6" Raise (lb)		17	35	52	66	93	160	240	410	1200
Weight per Additional 1" Raise (lb)		0.3	0.9	1.4	1.5	2.6	2.5	3.7	5.5	9.0
Key Torque (in-lb)		153	581	1565	2527	3538	4665	8828	15697	39396
Max Worm Speed at Full Load (rpm)	Standard	1750	1615	1198	643	449	544	369	368	288
	Optional Number 1	1576	694	645	330	231	266	189	258	231
	Optional Number 2	1669	1286	-	-	-	-	-	-	-
Max Load at Full Horsepower and 1750 rpm (lb)	Standard	1333	3047	4386	3406	2972	4664	4220	5949	8865
	Optional Number 1	1156	972	1791	1276	843	1507	1192	2831	4671
	Optional Number 2	1258	2339	-	-	-	-	-	-	-

Stainless Steel Machine Screwjack

(approx. 1.6Mb)

Part N°	Capacity (tons) - 17-4PH Worm	Capacity (tons) - 316 SS Worm	Weight with 6" Raise (lb)	Weight per Additional 1" Raise (lb)	Key Torque (in-lb)	Unit Price
4050-T22115	2	0.67	17	0.3	153	Quote Required
4050-T22116	5	1.66	35	0.9	581	Quote Required
4050-T22117	10	3.33	52	1.4	1565	Quote Required
4050-T22118	15	5.00	66	1.5	2527	Quote Required
4050-T22119	20	6.66	93	2.6	3538	Quote Required
4050-T22120	25	8.33	160	2.5	4665	Quote Required
4050-T22121	35	11.66	240	3.7	8828	Quote Required
4050-T22122	50	16.66	410	5.5	15697	Quote Required
4050-T22123	100	33.33	1200	9.0	39396	Quote Required
More information about shopping on LiftingSafety Quotation Help Please choose the correct configuration of your desired product, then once complete - press on the 'Request Quote' button, this item will then be added to your basket (). To view your basket, simply click on the basket icon at the top of the page

These Stainless Steel Screwjack Actuators are specifically designed for harsh environments, in standard and special configurations for loads up to 100 tons.

They incorporate all of the same features as a standard machine screw actuator, but can be used in severe environments where other materials are inadequate.

All of the exposed surfaces are made of 316 stainless steel including the lifting screw, housing, shell cap, worm and dust guard.

Corrosion resistant.
Stainless Steel hardware.
Sealed gear cavity to keep contaminants out.
Anti-backlash and Metric machine screw actuators are also available.

Stainless Steel Machine Screw Actuator Dimensions

17 - 4 PH Worm Cap.(Tons)	316 SS Worm Capacity (tons)		A	B	C	D	E+/-.005	F	G	H	J+.000/-.002	K	L	M	N
17 - 4 PH Worm Cap.(Tons)	Sustaining	Operating	A	B	C	D	E+/-.005	F	G	H	J+.000/-.002	K	L	M	N
2 (1800 series)	2	.67	5.50	4.56	Travel	.50	1.750	1.66	4.25	.50	.500	3.00	6.00	1.00	2.00
2 (9000 series)	2	.67	5.50	4.56	Travel	.50	1.750	1.66	4.25	.50	.500	1.56	3.13	1.93	5.25
5	5	1.66	7.50	5.88	Travel	.50	2.250	2.38	4.50	.60	.749	2.25	4.50	2.25	6.50
10	10	3.33	7.75	5.62	Travel +3/8	.50	2.250	2.88	5.75	.94	1.000	2.88	5.75	2.00	7.00
15	15	5.00	8.00	6.31	Travel + 9/16	.63	2.750	2.88	5.75	.94	1.000	3.00	6.00	2.50	7.50
20	20	6.66	10.25	7.13	Travel + 1/2	.75	3.250	3.50	5.75	.94	1.000	3.00	6.00	3.00	8.75
25	25	8.33	11.75	9.75	Travel + 1/4	1.00	4.000	4.50	8.50	.94	1.375	3.75	7.50	3.75	11.00
35	35	11.66	12.50	9.56	Travel + 1/4	1.25	4.000	4.50	10.50	1.31	1.375	3.75	7.50	4.50	12.50
50 (1800 series)	50	16.66	13.50	11.38	Travel + 5/8	1.25	4.750	5.63	11.25	1.25	1.500	8.00	16.00	3.00	6.00
100	100	33.33	24.00	18.50	Travel + 1/2	1.50	6.000	7.00	14.00	2.94	1.750	10.00	20.00	5.75	16.26

P	Q	R	S	T	U	V	W	X	Y	Z	a	b	Keyseat	Lifting Screw (dia./Pitch)
3.50	7.00	1.75	3.50	3.50	7.00	1.12	1.702 +.003/-.000	.41	3.00	.41	.75	.5	.125 x .060 x 1.00 LG.	1.00 x .250
2.06	4.13	2.42	6.25	3.50	7.00	1.12	1.702 +.003/-.000	.41	3.00	.41	.88	.38	.125 x .060 x 1.00 LG.	1.00 x .250
3.00	6.00	3.00	8.00	4.50	9.00	1.50	2.188 +.002/-.000	.69	3.00	.69	1.19	.75	.188 x .094 x 1.25 LG.	1.50 x .375
3.75	7.50	2.88	8.75	5.50	11.00	1.80	2.598 +.003/-.000	.81	4.13	.81	1.31	.88	.250 x .125 x 1.50 LG.	2.00 x .500
3.88	7.75	3.38	9.25	5.50	11.00	1.80	2.598 +.003/-.000	.81	4.13	.81	1.38	.88	.250 x .125 x 1.50 LG.	2.25 x .500
4.13	8.25	4.13	11.00	5.50	11.00	1.50	2.598 +.003/-.000	.81	4.13	1.12	1.75	1.13	.250 x .125 x 1.50 LG.	2.50 x .500
5.13	10.25	5.13	13.75	7.00	14.00	2.30	3.750 +.006/-.000	1.06	6.00	1.38	2.13	1.38	.313 x .156 x 2.00 LG.	3.00 x .666
5.13	10.25	6.00	15.50	7.00	14.00	2.10	3.750 +.006/-.000	1.62	7.75	1.62	2.63	1.38	.313 x .156 x 2.00 LG.	3.75 x .666
9.88	19.75	4.88	9.75	11.00	22.00	4.40	5.313 +.003/-.000	1.38	8.75	1.88	3.25	1.88	.375 x .188 x 2.25 LG.	4.50 x .666
12.25	24.50	8.00	20.75	11.50	23.00	3.40	7.500 +.003/-.000	1.88	11.00	1.88	3.50	2.25	.500 x .250 x 3.00 LG.	6.00 x .750

Capacity	A**	B**	C	D	E	F**	G**	H	J
2 Ton SMS	5 1/4	1 3/4	3/4	13/32	3/4	6	2 1/2	1 1/8	3/4"-10UNC-2A
5 Ton SMS	7	2 1/2	1	21/32	1	8	2 1/2	1 1/8	1"-8UNC-2A
10 Ton SMS	7 1/2	3	1 1/4	25/32	1 1/4	9 1/4	4 1/4	1 5/8	1 1/2"-6UNC-2A
15 Ton SMS	8 1/2	3	1 1/4	29/32	1 1/2	10 1/4	4 1/4	2	1 3/4"-5UNC-2A
20 Ton SMS	10	3 1/2	1 1/2	1 1/32	1 3/4	12 1/2	5	2 1/4	2"-4 1/2UNC-2A
25 Ton SMS	12	4	1 3/4	1 9/32	2 1/4	14 1/2	5 3/4	3 1/4	2 1/2"4-UNC-2A
35 Ton SMS	13	5	2	1 17/32	2 1/2	15 1/2	7	3 3/4	3 1/4"-4UNC-2A
50 Ton SMS	15	5 1/2	2 1/2	1 21/32	3 1/4	18	8	4 1/4	4"4UNC-2A
100 Ton SMS	24	9	3	2 17/32	4 1/4	25	12	5	1 1/2"-12UNC-2A

Capacity	M	N**	P**	R	S	T	U	V
2 Ton SMS	1	5 1/4	1 3/4	4 1/4	7/16	4	13/32	3
5 Ton SMS	1 1/2	7 1/2	2 1/2	4 1/2	5/8	4	11/16	3
10 Ton SMS	2	7 3/4	2 3/4	5 3/4	15/16	4	13/16	4 1/8
15 Ton SMS	2 1/4	8 1/2	2 3/4	5 3/4	15/16	4	13/16	4 1/8
20 Ton SMS	2 1/2	10 1/4	3	5 3/4	15/16	4	13/16	4 1/8
25 Ton SMS	3	11 3/4	3	8 1/2	15/16	4	1 1/16	6
35 Ton SMS	3 3/4	12 1/2	4	10 1/2	1 5/16	4	1 5/8	7 3/4
50 Ton SMS	4 1/2	13 1/2	3 1/2	11 1/4	1 1/4	4	1 3/8	8 3/4
100 Ton SMS	6	24	12	14	2 15/16	6	1 7/8	11

Stainless Steel Actuator Performance Specifications

Capacity (tons) - 17-4PH Worm		2	5	10	15	20	25	35	50	100
Capacity (tons) - 316 SS Worm		0.67	1.66	3.33	5.00	6.66	8.33	11.66	16.66	33.33
Lifting Screw	Diameter (in)	1	1 1/2	2	2 1/4	2 1/2	3	3 3/4	4 1/2	6
	Pitch (in)	0.250	0.375	0.500	0.500	0.500	0.666	0.666	0.666	0.750
	Type	ACME	ACME	ACME	ACME	ACME	ACME	ACME	Mod.Sq.	Mod.Sq.
Worm Gear Ratios	Standard	6:1	6:1	8:1	8:1	8:1	10 2/3:1	10 2/3:1	10 2/3:1	12:1
	Optional Number 1	24:1	24:1	24:1	24:1	24:1	32:1	32:1	32:1	36:1
	Optional Number 2	12:1	12:1	-	-	-	-	-	-	-
Turns of Worm for 1" Raise	Standard	24	16	16	16	16	16	16	16	16
	Optional Number 1	96	64	48	48	48	48	48	48	48
	Optional Number 2	48	32	-	-	-	-	-	-	-
Worm Torque at No Load (in-lb)	Standard	5	10	20	20	30	40	50	100	200
	Optional Number 1	5	10	20	20	30	40	50	100	200
	Optional Number 2	5	10	-	-	-	-	-	-	-
Maximum Horsepower per Actuator	Standard	2	4	5	5	5	8	8	15	25
	Optional Number 1	1/2	3/4	1 1/2	1 1/2	1 1/2	2 1/2	2 1/2	6	11
	Optional Number 2	3/4	2	-	-	-	-	-	-	-
Worm Torque at Full Load (in-lb) 17-4PH Worm	Standard	120	450	750	1430	2050	2700	4000	7500	16000
	Optional Number 1	50	185	400	820	1170	1700	2400	4200	8600
	Optional Number 2	75	275	-	-	-	-	-	-	-
Worm Torque at Full Load (in-lb) 316SS Worm	Standard	43	156	263	490	703	926	1366	2566	5466
	Optional Number 1	20	68	147	287	410	593	833	1466	3000
	Optional Number 2	28	98	-	-	-	-	-	-	-
Efficiency Rating (%)	Standard	20.4	21.2	25.2	20.3	18.9	17.9	17.0	12.9	12.1
	Optional Number 1	11.1	12.1	15.1	11.6	10.8	9.3	9.3	7.5	7.4
	Optional Number 2	15.6	16.8	-	-	-	-	-	-	-
Weight with 6" Raise (lb)		17	35	52	66	93	160	240	410	1200
Weight per Additional 1" Raise (lb)		0.3	0.9	1.4	1.5	2.6	2.5	3.7	5.5	9.0
Key Torque (in-lb)		153	581	1565	2527	3538	4665	8828	15697	39396
Max Worm Speed at Full Load (rpm)	Standard	1750	1615	1198	643	449	544	369	368	288
	Optional Number 1	1576	694	645	330	231	266	189	258	231
	Optional Number 2	1669	1286	-	-	-	-	-	-	-
Max Load at Full Horsepower and 1750 rpm (lb)	Standard	1333	3047	4386	3406	2972	4664	4220	5949	8865
	Optional Number 1	1156	972	1791	1276	843	1507	1192	2831	4671
	Optional Number 2	1258	2339	-	-	-	-	-	-	-

Stainless Steel Machine Screwjack

(approx. 1.6Mb)

Contact Us About This Product

If you wish to receive a quote for this product, please use the tab above, this form is for general enquiries regarding this product only.

Regarding: Stainless Steel Machine Screwjack Actuator, 2t to 100t

Full Name:

Email Address:

Daytime Telephone:

Country:

Subject:

Message:

Attachment: - Optional
(jpg,gif,png,webp,pdf,doc,xls)

I agree to the Terms & Conditions and the Terms & Conditions of Export (if applicable). I agree to having my data stored in accordance with the Privacy Policy. I want to get exclusive email offers.

Did you know?

You can also Request a Quote using the Quote tab above!

You can easily add more than one item to the Quote Request. This is highly recommended as we will be able to suit your needs much more efficiently.

Share this page!

Save this QR code
for use on Smart Phones

Lifting Equipment

Height Safety Equipment

Stainless Steel Machine Screwjack Actuator, 2t to 100t

Stainless Screwjack Actuator.

Stainless Steel Machine Screw Actuator Dimensions

Stainless Steel Actuator Performance Specifications

More information about shopping on LiftingSafety

Quotation Help

Stainless Steel Machine Screw Actuator Dimensions

Stainless Steel Actuator Performance Specifications

Products of Possible Interest

Contact Us About This Product

Share this page!