SJA1000 Screw jack

Keywords:

SJA1000 Screw jack

Category:

SJA Acme Screw Jack

Asia, America,

Africa , Australia

Europe, America,
Africa, Oceania

Phone

Wechat

L13311099286

0086-13691276470

export@lim-tec.com

vera.zha@lim-tec.com

Screw Jack and Linear Actuator 2026.pdf
SJASJB_lxsjj.zip

3D Model Download

Consultation

Description

SJA Acme Screw Screw Jack

High-precision motion, smooth operation, low noise, high speed

Advanced Structural Design for Enhanced Performance
Lim-Tec screw jacks feature a unique square-groove housing design, which significantly improves heat dissipation capacity, reduces operating temperature, and extends grease service life. The use of high-strength ductile iron housing enhances mechanical strength, durability, and reliability, making the screw jack suitable for demanding applications in both high-temperature and low-temperature environments.

Precision Control and Superior Reliability
The innovative square tail cover design effectively prevents lead screw rotation during operation, ensuring stable and accurate linear movement. Advanced CNC machining equipment, strict quality control, and optimized assembly processes guarantee consistent performance and long service life.

Modular Design for Unlimited Configuration Options
Lim-Tec screw jacks offer flexible configuration possibilities to meet diverse application requirements. It can be directly integrated with motors, gear motors and other drive systems, providing customers with thousands of customized combinations. For detailed technical specifications, please contact Lim-Tec.

Customized Solutions Available
Lim-Tec provides tailor-made solutions including:
Stainless steel housing and components; Stainless steel screw jack solutions for corrosive environments; Extended stroke / long screw designs; High and low temperature resistant solutions;
Customized mounting and drive configurations

Complete Accessories and Optional Features
To meet different industrial requirements, Lim-Tec screw jacks can be equipped with a comprehensive range of accessories and options, including:
Protective bellows / dust covers; Special thread designs; Safety nuts;Ball screws; Limit switches; Safety clutches;Overload protection clutches; Potentiometers; Encoders; Brakes; Hand wheels; Mounting accessories,etc.

Performance Table

Size		SJA200	SJA300	SJA450	SJA700	SJA1000
Max lifting load kN		200	300	450	700	1000
Screw dia x pitch mm		Tr80×12	Tr100×16	Tr120×16	Tr140×20	Tr160×20
Worm ratio	V1	1:8.75	1:10.25	1:10.75	1:13.33	1:13.33
Worm ratio	L1	1:35	1:41	1:43	1:40	1:40
Stroke for one input turn mm	V1	1.37	1.56	1.49	1.50	1.50
Stroke for one input turn mm	L1	0.34	0.39	0.37	0.5	0.5
Max input power kW	V1	4	7	11.5	18.5	22
Max input power kW	L1	3.5	5.5	7	7.5	9.5
Max starting torque at full load Nm	V1	265	460	675	1050	1620
Max starting torque at full load Nm	L1	106	180	275	510	820
Sarting efficiency	V1	0.17	0.18	0.16	0.16	0.15
Sarting efficiency	L1	0.11	0.12	0.1	0.11	0.1
Running efficiency at 1500rpm	V1	0.33	0.33	0.3	0.31	0.29
Running efficiency at 1500rpm	L1	0.22	0.23	0.2	0.21	0.19
Torque without load Nm	V1	2.8	3.8	5.5	8.5	11
Torque without load Nm	L1	2.1	3.1	4.5	5.5	7.5
Housing material		Spheroidal graphite iron			Cast steel
Weight kg		75	110	200	400	800
Weight per 100mm screw &protective tube kg		4.5	6.8	9	12.5	16.5

Note: The ambient operating temperature for all product series is –10°C to 40°C. (For operation at –40°C to +70°C, please consult your local engineer.)
Lead screws are available with two‑start and three‑start threads; the lifting speed increases proportionally. For detailed specifications, please consult your local sales engineer. For the precise actual reduction ratio, please contact a Lim-Tec engineer.

| Selection Table Guide

n1=input speed Nm=input torque required kW=input power required

SJA1000			Lifting Load
SJA1000			1000kN				800kN				600kN				400kN
n1	Lifting speed mm/s		Ratio				Ratio				Ratio				Ratio
n1	Lifting speed mm/s		V1		L1		V1		L1		V1		L1		V1		L1
RPM	V1	L1	Nm	kW	Nm	kW	Nm	kW	Nm	kW	Nm	kW	Nm	kW	Nm	kW	Nm	kW
1400	35	11.7	823	121	419	61.4	659	96.6	335	49.1	494	72.4	251	36.8	329	48.3	168	24.6
900	22.5	7.5	884	83.3	442	41.7	708	66.7	354	33.3	531	50	265	25	354	33.3	177	16.7
700	17.5	5.83	955	70	468	34.3	764	56	374	27.4	573	42	281	20.6	382	28	187	13.7
500	12.5	4.17	1038	54.4	497	26	831	43.5	398	20.8	623	32.6	298	15.6	415	21.7	199	10.4
300	7.5	2.5	1137	35.7	568	17.9	910	28.6	455	14.3	682	21.4	341	10.7	455	14.3	227	7.14
100	2.5	0.83	1327	13.89	663	6.94	1061	11.1	531	5.56	796	8.34	398	4.17	531	5.56	265	2.78
50	1.25	0.42	1592	8.33	796	4.17	1274	6.67	637	3.33	955	5	477	2.5	637	3.33	318	1.67

Note: In the table, green‑shaded areas indicate that the selected model has exceeded its maximum allowable input power. If this model is chosen, please reduce the duty cycle accordingly. For specific selection guidance, please consult your local sales office.

SJA1000 Screw Jack

Note: 1. The screw jack dimension will be changed if the safety nut SN or anti-backlash AB is equipped, please consult Lim-Tec’s engineers for specifics.
2. For screw jack model SJA450, SJA700, SJA1000, the normal working condition is under compressive load(push),please consult with Lim-Tec engineers to check the load capacity and installation method if tensile load(pull) is required.