Heavy Load Linear Ball Guides - TO Series
TOH-CA/HA: Square Type
IMTEK TO Series heavy duty square type linear guides meets the growing demand for linear motion systems capable of handling heavy loads with heavy rigidity and long-term precision.
Built on IMTEK’s years of experience in linear motion area, TO Series represents a stable and reliable solution for you if your machine design requires high stiffness, smooth movement and consistent accuracy when the machines work in heavy load operating conditions.
Different from lighter models, square linear guides TOH model are with a robust rail structure and an optimized ball circulation design, suitable for applications, such as CNC machining centers, heavy cutting machinery and industrial automation systems demanding durability and precision.
- Linear guide block fixing method:
Lock from above(TOH-CA/HA); - Different length of TO series Flange type:
-CA/CB/CC for normal length
-HA/HB/HC for extra length of linear guide block. - Different materials of IMTEK linear ball guides:
-Alloy steel for normal series products.
-Stainless steel material, a new version for special application environment.
Design Advantages and Structure
TOH series features a square cross-section rail providing you superior rigidity and stability. Its geometry effectively resists deformation under heavy loads and high moment conditions. Each linear rail and block is precisely ground to achieve a high level of straightness and dimensional accuracy, ensuring smooth and repeatable linear motion even under fluctuating or dynamic loads. Internal raceway geometry is to distribute load evenly in four directions, radial, reverse radial, and both lateral sides, achieving what engineers refer to as “equal load in four directions.”
This balanced structure enhances overall service life and maintains precision in long-term use.
- High Rigidity and Load Capacity – Square design enhances stiffness and ensures consistent motion under heavy loads.
- Precision Ground Rails and Blocks – Ensures smooth operation with minimal friction and superior positioning accuracy.
- Long Service Life – Optimized contact geometry and advanced heat treatment extend service life.
- Excellent Impact Resistance – Ideal for high-speed and high-load automation equipment
Technical Data
- Basic Information
- Model Name
- Model Name
- Dimentions
| Series | TO Series |
| Size | 15/20/25/30/35/45/55/65 |
| Block Type | Square |
| Load Type | heavy load/super heavy load |
| Block Fixing Method | lock from above |
| Length of Rail | 100~6000mm |
| Numbers of Block | 1/2/3/4/5/6/ |
| Accuracy level | C(normal);H(high);P(precision) |
| Certification | ISO 9001/ISO 14001 |
| Block Dimensions | TOH-15/20/25/30/35/45/55/65-CA/HA |
| Installation Width(W) | 34; 44; 48; 60; 70; 86; 100; 126 |
| Combination Height(H) | 28; 30; 40; 45; 55; 70; 80; 90 |
| Length(L) | 61.4; 77.5/92.2; 84/104.6; 97.4/120.4; 112.4/138.2; 139.4/171.2; 166.7/204.8; 200.2/259.6 |
| Thread(M*l) | M4*5; M5*6; M6*8; M8*10; M8*12; M10*17; M12*18; M16*20 |
| Hole Spacing(B) | 26; 32; 35; 40; 50; 60; 75; 76 |
| Hole Spacing(C) | 26; 36/50; 35/50; 40/60; 50/72; 60/80; 75/95; 70/120 |
| Block Material | 20CrMo |
| Rail Dimensions | TOR 15/20/25/30/35/45/55/65 |
| Width(WR) | 15; 20; 22; 28; 34; 45; 53; 63 |
| Height(HR) | 15; 17.5; 22; 26; 29; 38; 44; 53 |
| Hole Pitch(p) | 60; 60; 60; 80; 80; 105; 120; 150 |
| D×h×d | 7.5*5.3*4.5; 9.5*8.5*6; 11*9*7; 14*12*9; 20*17*14; 23*20*16; 26*22*18 |
| Static Capacity C0(kN) | 23.47; 36.68/47.96; 52.82/69.07; 71.87/93.99; 93.88/122.77; 146.71/191.85; 211.23/276.23; 287.48/420.17 |
| Dynamic Capacity C(kN) | 14.7; 27.1/32.7; 34.9/42.2; 48.5/58.6; 64.6/77.9; 103.8/125.3; 125.3/184.9; 213.2/277.8 |
| Rail Material | S55c Alloy Steel |
Application Cases
Precision Processing Machine
TOH Series heavy-duty square type linear guides are widely used in high-performance industrial equipment, including:
·Machining Center ·NC Lathes
·Precision Processing Machine ·Heavy Cutting Machines
·Marble cutting machine ·Grinding Machines
·Injection Machines ·Punch
·Automation Devices ·Transportation Equipment
·Measuring Instrument
In each of these fields, TOH linear guides contribute to improved positioning accuracy, smoother motion, and longer equipment service life.
Automated Guided Vehicle
Compared with standard or compact linear guide models, TOH Series delivers a significantly higher load rating and moment capacity Its square rail structure resists torsion and vibration during operation, maintaining smoother travel even when subjected to heavy-duty or unbalanced loads. For machine tool designers, this means more flexibility in frame design and less concern about deformation under large moment forces. For users, it means greater reliability, longer replacement cycles, and stable machining precision.
For warehouse automation equipment, linear guides may be used together with ball screws or linear modules to support transfer, positioning, and auxiliary handling axes. Read more about linear guides and modules for AS/RS motion units.
Why Choose IMTEK
IMTEK uses high-carbon chromium steel for both rails and sliders, with the surfaces finished through advanced grinding and anti-corrosion treatment processes. Every component is inspected for dimensional consistency and parallelism before assembly. This strict quality control ensures the product’s interchangeability and installation accuracy when used in combination with other IMTEK linear motion components. All TOH series products are manufactured under IMTEK’s standard production process, which covers material preparation, precision machining, heat treatment, grinding, assembly, and final inspection. By maintaining full control of each step, IMTEK guarantees that every linear guide meets stable mechanical performance and consistent product quality.
Every TOH rail and block is precision ground and heat-treated under controlled conditions to achieve optimal surface hardness and wear resistance. Combined with a low-friction ball circulation path, TOH linear guides maintain consistent motion without stick-slip or sudden resistance changes.
This combination of precision finishing and material quality ensures a long operating life of linear bearings, even under continuous operation or harsh industrial environments. You benefit from reduced maintenance frequency and lower overall operation costs.
The optional lubrication port design allows easy application of grease or oil, and automatic lubrication systems can also be integrated based on customer requirements. Suitable lubrication management helps sustain performance over millions of travel cycles.
