SJB450 Ball Screw Jack

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Category:

SJB Ball 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

SJB Ball Screw Jack

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

Lim-Tec Screw Jack

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.

Bevel Gear Screw Jack Parameter Table

Model number		SJB10	SJB20	SJB21	SJB22	SJB50	SJB51	SJB80	SJB81	SJB100	SJB101	SJB200	SJB201	SJB300	SJB450
Max lifting load kN		10	20	20	20	50	35	60	60	80	80	90	160	240	320
Rated dynamic load kN		11	17	25	25	46	30	53	56	71	71	78	145	220	282
Screw dia x pitch mm		20×5	32×5	32×10	32×20	40×10	40×20	50×10	50×20	63×10	63×20	80×10	80×20	100×20	100×25
Worm ratio	V1	1:4	1:6	1:6	1:6	1:7	1:7	1:8	1:8	1:8	1:8	1:8.75	1:8.75	1:10.25	1:10.25
Worm ratio	L1	1:16	1:24	1:24	1:24	1:28	1:28	1:32	1:32	1:32	1:32	1:35	1:35	1:41	1:43
Stroke for one input turn mm	V1	1.25	0.83	1.67	3.34	1.43	2.86	1.25	2.5	1.25	2.5	1.14	2.28	1.95	2.33
Stroke for one input turn mm	L1	0.31	0.21	0.43	0.87	0.37	0.74	0.32	0.65	0.32	0.65	0.29	0.58	0.488	0.58
Max input power kW	V1	0.57	1.14	1.14	1.14	2.2	2.2	2.5	2.5	3	3	4	4	7	11.5
Max input power kW	L1	0.27	0.55	0.55	0.55	1.1	1.1	1.5	1.5	2.2	2.2	3.5	3.5	5.5	7.5
Max starting torque at full load Nm	V1	4.8	8.2	15.3	29.2	34.4	47.4	36.8	72.3	49	97	53.2	200	260	395
Max starting torque at full load Nm	L1	1.8	3.4	6.3	12.1	14.6	19.4	15.3	29.9	20.4	40	23.4	83	110	165
Starting efficiency	V1	0.41	0.32	0.35	0.36	0.33	0.34	0.32	0.33	0.32	0.34	0.31	0.31	0.30	0.27
Starting efficiency	L1	0.27	0.2	0.21	0.22	0.2	0.21	0.2	0.2	0.2	0.21	0.18	0.18	0.18	0.16
Running efficiency at 1500rpm	V1	0.59	0.58	0.62	0.65	0.59	0.6	0.58	0.59	0.58	0.60	0.55	0.55	0.53	0.50
Running efficiency at 1500rpm	L1	0.42	0.39	0.42	0.44	0.39	0.41	0.39	0.40	0.39	0.41	0.35	0.35	0.35	0.3
Housing material		Spheroidal graphite iron
Weight kg		6	9.5	9.5	10	23	24	38	40	62	64	78	78	125	230
Weight per 100mm screw & protective tube kg		0.5	0.8	0.8	0.8	1.6	1.6	2.5	2.5	3.2	3.2	4.6	4.6	7.3	9.6

Note: The ambient operating temperature for all product series is –20°C to +40°C (for –40°C to +70°C, please consult your local engineer); for the exact reduction ratio, please contact a Lim-Tec engineer.

Selection Table Guide

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

SJB450			Increase the load
SJB450			450kN				320kN				200kN				100kN
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	54.3	13.6	333.14	48.84	126.19	18.50	236.90	34.73	89.73	13.15	148.06	21.71	56.08	8.22	74.03	10.85	28.04	4.11
900	34.9	8.7	346.94	32.70	134.41	12.67	246.72	23.25	95.58	9.01	154.20	14.53	59.74	5.63	77.10	7.27	29.87	2.81
700	27.1	6.8	353.97	25.95	142.37	10.44	251.71	18.45	101.24	7.42	157.32	11.53	63.27	4.64	78.66	5.77	31.64	2.32
500	19.4	4.8	361.55	18.93	151.14	7.91	257.10	13.46	107.48	5.63	160.69	8.41	67.17	3.52	80.34	4.21	33.59	1.76
300	11.6	2.9	377.47	11.86	160.45	5.04	268.42	8.43	114.10	3.58	167.76	5.27	71.31	2.24	83.88	2.64	35.66	1.12
100	3.9	1.0	399.18	4.18	165.99	1.74	283.86	2.97	118.04	1.24	177.41	1.86	73.77	0.77	88.71	0.93	36.89	0.39
50	1.9	0.5	415.74	2.18	173.36	0.91	295.64	1.55	123.28	0.65	184.77	0.97	77.05	0.40	92.39	0.48	38.53	0.20

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