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LIM-TEC SATELLITE ROLLER SCREW
LIM-TEC SATELLITE ROLLER SCREW
Company Overview and Background
Lim-Tec, publicly listed on NEEQ since 2016, is a pioneering Chinese manufacturer specializing in screw jacks and linear actuators. Founded in 2005 as a joint venture, the company integrates advanced European technology and operates 10 sales offices across China. Lim-Tec expanded into automation control products in 2008 and became a joint-stock company in 2015 with a registered capital of 30 million RMB. By 2019, it invested heavily in CNC machinery and temperature-controlled plants, boosting annual production capacity to 100,000 sets and establishing a machining center for lead screws.
Product Focus: Satellite Roller Screws
Lim-Tec’s core product line centers on satellite roller screws, which convert rotary motion into linear motion with high load capacity due to multiple contact points. The four main types are:
- LM Type: Non-recirculating rollers with multi-head lead screws and triangular tooth profiles, preventing axial displacement.
- LMR Type: Recirculating rollers for high precision positioning, with rollers mounted on tracks and axial movement controlled by cams.
- LMI Type: Inverted roller screws where rollers rotate around the lead screw and move axially within the nut; longer nuts limit stroke length.
- HLM Type: Heavy-loaded roller screws designed for demanding applications.
Bearing units complement these designs. Lead precision grades range from G1 (6µm/300mm) to G9 (200µm/1000mm).
Technical Specifications and Parameters
The document provides comprehensive technical data for satellite roller screws (LM series, diameters 8mm to 99mm), including:
- Mechanical Efficiency (η and η’): High efficiencies between 0.83 and 0.89, with slightly lower values under low mechanical conditions.
- Load Capacities (C0a and C0): Static and dynamic load capacities ranging from approximately 15,000 N to over 160,000 N (static) and 651 kN to 1673 kN (dynamic), depending on screw size and lead.
- Rigidity Factor (Rf): Values around 89 to 164 indicating screw assembly stiffness.
- Axial Interval (Sap): Tight manufacturing tolerances with intervals around 0.04 to 0.05 mm.
- Moments of Inertia (Is, In, Ir): Provided for screw, nut, and roller to assist dynamic design calculations.
- Dimensions: Detailed nominal diameters, external diameters, thread root diameters, and nut/screw length parameters.
- Oiling Mass (Znn, Zss): Lubrication volumes specified for screw nuts and lead screws, critical for maintenance.
Applications
Lim-Tec’s satellite roller screws serve diverse industries including aeronautics, automation, defense, aerospace, equipment manufacturing, 3C electronics, infrastructure (bridges, railways), and automotive sectors. Their products enable heavy load handling and precise linear motion control in demanding environments.
Product Selection and Nomenclature
The company uses a standardized coding system for satellite roller screws that specifies:
- Type (LM, LMR, LMI, HLM)
- Nut type (single, preloaded, double)
- Nut design (cylindrical, flanged, special)
- Seal presence
- Screw diameter and lead
- Thread direction (right, left, mixed)
- Thread accuracy grade
This system guides customers in precise product configuration.
Best Practices and Recommendations
- Select satellite roller screws based on load capacity, mechanical efficiency, rigidity, and precision grade to meet application needs.
- Choose screw type (non-recirculating, recirculating, inverted, heavy-loaded) according to stroke length, load, and precision requirements.
- Ensure proper lubrication using specified oiling masses to maintain performance and longevity.
- Reference detailed dimensional data to guarantee mechanical compatibility.
- Leverage Lim-Tec’s advanced manufacturing and quality control for reliable, high-performance products suitable for critical industrial applications.
Summary of Critical Technical Parameters
| Type | Nominal Diameter (d0, mm) | Screw Lead (P, mm) | Mechanical Efficiency (η) | Dynamic Load Capacity (C0, kN) | Static Load Capacity (C0a, kN) | Moment of Inertia of Screw (Is, kg·mm²/m) | Oiling Mass of Nut (Znn, cm³) |
|---|---|---|---|---|---|---|---|
| HLM 60 | 60 | 15-30 | 0.84-0.89 | 651-665 | 9,990-18,700 | 62-89 | 20-27 |
| HLM 99 | 99 | 15-35 | 0.85-0.89 | 1,301-1,354 | 74,000-220,000 | 93-145 | 400-440 |
| HLM 120 | 120 | 15-40 | 0.83-0.89 | 1,599-1,673 | 160,000-516,000 | 99-164 | 700-750 |
This data supports engineers in selecting satellite roller screws and lead screws optimized for load, efficiency, and dimensional constraints.
Manufacturer Information
Technical data is provided by Lia-Tee® LIM-TEC (Liang Transmission Equipment Co., LTD). Contact via www.lim-tec.com or email [email protected].
Catalog excerpts
On February 25, 2016, Lim-Tec successfully listed on NEEQ（code：836388） The first listed company to make screw jacks and linear actuators in CHINA and expert in China’s linear motion industry. In 2005, Lim-Tec Group and Beijing Reloh International Trade Co.,LTD jointly established Lim-Tec (Beijing) Transmission Equipment Co., Ltd., With the advanced technology and process from Europe, Lim-Tec has rapidly grown into a large domestic professional manufacturer of linear actuators/screw jacks/servo electric cylinder,leading the domestic linear motion industry. Lim-Tec has 10 sales offices in major...
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Satellite Roller Screw Satellite Roller Screw Contents Lim-tec satellite roller screws Lim-tec satellite roller screw selection Lim-tec Satellite Roller screw Dimensions Applications
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Satellite Roller Screw The satellite roller screws are used to transform rotary movements into linear movements. The rolling elements are threaded rollers between the screw and the nut. The high number of points of contact enables satellite roller screws to support very heavy loads. Lim-Tec satellite roller screw is classified as satellite roller screws with no re-circulation (LM types),screws with recirculating rollers (LMR type), the inverted roller screws (LMI type) and heavy-loaded roller screws (HLM type). Bearing units are also proposed to equip the different roller screw designs. The grades...
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LMR Satellite Roller Screw LMR satellite roller screw is precision machined for high precision positioning applications, Meanwhile, high rigidity and load capacity are requested. LMR satellite roller screw comprises main lead screw,nut and roller,the roller is mounted on roller track and holder ensuring distances between roller bearings. The main lead screw is single head or double,the tooth shape is triangle, and the adjacent surface of the lead screws is 90°,tooth shape of internal thread is the same as that of the main lead screw. There is no screw thread on rollers, but the slot is perpendicular...
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Satellite Roller Screw LMI Satellite Roller Screw Motion principles of LMI type satellite roller screw are basically same as LM type satellite roller screw,except that the the nut system is inverted.That is, the roller rotates around the lead screw and moves within the nut axially (LM type satellite roller screw rotates around the nuts). Except the segment that engages with the rollers, the rest of the shaft ends on the main lead screw can be optical shafts or special shafts(such as anti rotation). The length of the nuts will be more than actual stroke required by customer,it will be much longer...
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Satellite Roller Screw Selection Table Guide R = Right hand thread B =1 right hand thread and 1 left hand thread L = Left hand thread Thread accuracy* 0 = Without wiper 1 = With wipers 1 = Cylindrical nut 6 = Nut with single side flange 7 = Nut with central flange 8 = Special nut design 1 = Single nut 2 = Preloaded nut 3 = Double nut Non re-circulation rollers screws Heavy-loaded roller screws Inverted roller screws Recirculating roller screws Customer identification
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Satellite Roller Screw Parameter Annotation: P---Screw lead d1---External diameter Rf---Rigidity factor Is---Moment of inertia of screw In---Moment of inertia of nut inertia Sap---Axial interval D---Reference diameter d2---Thread root diameter η---Mechanical high efficiency of satellite roller screw Ir---Moment of inertia of roller Znn--Oiling mass of screw nut Zss--Oiling mass of Lead screw η'---Mechanical low efficiency of satellite roll
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Parameter Annotation: P---Screw lead D---Reference diameter η---Mechanical high efficiency of satellite roller screw d0---Nominal diameter d1---External diameter η'--- Mechanical low efficiency of satellite roller screw C0---Dynamic load capacity
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Satellite Roller Screw Parameter Annotation: P---Screw lead d1---External diameter Rf---Rigidity factor Is---Moment of inertia of screw In---Moment of inertia of nut inertia Sap---Axial interval D---Reference diameter d2---Thread root diameter η---Mechanical high efficiency of satellite roller screw Ir---Moment of inertia of roller Znn--Oiling mass of screw nut Zss--Oiling mass of Lead screw η'---Mechanical low efficiency of satellite roll
Open the catalog to page 12
Parameter Annotation: P---Screw lead D---Reference diameter η---Mechanical high efficiency of satellite roller screw d0---Nominal diameter d1---External diameter η'--- Mechanical low efficiency of satellite roller screw C0---Dynamic load capacity
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Satellite Roller Screw Parameter Annotation: P---Screw lead d1---External diameter Rf---Rigidity factor Is---Moment of inertia of screw In---Moment of inertia of nut inertia Sap---Axial interval D---Reference diameter d2---Thread root diameter η---Mechanical high efficiency of satellite roller screw Ir---Moment of inertia of roller Znn--Oiling mass of screw nut Zss--Oiling mass of Lead screw η'---Mechanical low efficiency of satellite roll
Open the catalog to page 14
Parameter Annotation: P---Screw lead D---Reference diameter η---Mechanical high efficiency of satellite roller screw d0---Nominal diameter d1---External diameter η'--- Mechanical low efficiency of satellite roller screw C0---Dynamic load capacity
Open the catalog to page 15
Satellite Roller Screw Parameter Annotation: P---Screw lead d1---External diameter Rf---Rigidity factor Is---Moment of inertia of screw In---Moment of inertia of nut inertia Sap---Axial interval D---Reference diameter d2---Thread root diameter η---Mechanical high efficiency of satellite roller screw Ir---Moment of inertia of roller Znn--Oiling mass of screw nut Zss--Oiling mass of Lead screw η'---Mechanical low efficiency of satellite roll
Open the catalog to page 16
Parameter Annotation: P---Screw lead D---Reference diameter η---Mechanical high efficiency of satellite roller screw d0---Nominal diameter d1---External diameter η'--- 低 Mechanical low efficiency of satellite roller screw C0---Dynamic load capacity
Open the catalog to page 17
Satellite Roller Screw Parameter Annotation: P---Screw lead d1---External diameter Rf---Rigidity factor Is---Moment of inertia of screw In---Moment of inertia of nut inertia Sap---Axial interval D---Reference diameter d2---Thread root diameter η---Mechanical high efficiency of satellite roller screw Ir---Moment of inertia of roller Znn--Oiling mass of screw nut Zss--Oiling mass of Lead screw η'---Mechanical low efficiency of satellite roll
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