The Roller Linear Guide uses cylindrical rollers as rolling elements, replacing traditional steel balls. The roller and raceway are in line contact, and the contact stress is much lower than point contact at the same size, so the rigidity and load bearing capacity are 2 to 3 times that of ball guides. The Hualong HRG series is based on the DB45°—— 45°combination design, with equal rigidity in all four directions, making it particularly suitable for heavy duty cutting machines, large gantry equipment, forging presses, and other applications that require absorption of impact loads. The roller retainer adopts a patented circulation structure to ensure smooth roller backflow, avoiding sliding and collision. The rated lifespan is calculated at 100km, and the ball bearing is 50km for better durability.
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A linear motion block (also called linear guide slider) is a core component paired with linear guides in mechanical systems which equipped with internal rolling elements (e.g., steel balls, rollers) to reduce friction for low noise and smooth operation.
Roller bearing guide rails are precision linear motion components which consist of a fixed rail, a movable slider, and cylindrical rollers (replacing balls) as the rolling elements. The unique design provides a larger contact area, resulting in higher load capacity, greater rigidity, and improved vibration dampening.
1. Ultra high rigidity: Roller linear contact forms a "surface support", which increases stiffness by more than 300% compared to ball bearings and reduces dynamic deformation by 60%.
2. Four directional equal rigidity: DB45° combination design makes the rigidity in the up, down, left, and right directions almost the same, adapting to multidimensional forces in heavy cutting.
3. Long life: The rated life is calculated based on 100km (50 km for ball bearings). The HRG series runs 1135 kilometers under an external load of 15kN, with no peeling between the raceway and roller surface. It runs 1500 kilometers at a speed of 120 m/min without any abnormalities.
4. Low friction and high speed: Optimize the gap between the roller end face and the reflux device, with a speed of up to 120 m/min and a friction coefficient of about 0.005.
5. Sealing and Scraping: Metal scraper and rubber wiper are standard, which can effectively isolate high temperature iron chips and chip fluid.
6. Pre compression options: Provide Z0 light preloading from 0.02C to 0.04C, ZA medium preloading from 0.07C to 0.09C, ZB heavy preloading from 0.12C to 0.14C to increase system resonance frequency and suppress cutting chatter.
Linear guides are classified by rolling elements
01
Ball Type：HGH、HEG、HWE、HMG、HQG
Point contact, smooth operation, suitable for high speed, medium and light loads.
02
Roller Type：HRG
Wire contact, extremely high rigidity, suitable for heavy loads and high rigidity requirements.
Linear guides are classified by installation method
Square Type：
All series have a square shape
Lock screw at the top of the slider, small width, saves space.
Flange Type：
Partial specifications of HGH, HEG, HWE, and HRG
The "ear" locking screws on both sides of the slider have a large installation surface for greater stability.
Hualong has 35 years of experience in heavy duty applications in the roller type linear guidance field. We operate a 50000 square meter heavy duty processing factory, equipped with a German high precision gantry guide rail grinder with a length of 8 meters and a straightness of ≤ 0.003mm/m, and an Austrian Aixie Lin controllable atmosphere heat treatment line to ensure that the hardness of each HRG guide rail is uniform and the depth of the hardened layer is ≥ 1.5mm.
Why do global heavy duty customers choose Hualong HRG roller guide rails?
1. Replace imports, shorten delivery time by 60%
Fully compatible with roller guide mounting dimensions from THK, INA, NSK and other brands, with comparable performance and a price reduction of 30 40%. Non standard customization takes 15 to 20 days for delivery, while imports typically take 8 to 12 weeks.
2. Controllable quality throughout the entire process
From the raw materials of bearing steel SUJ2, heat treatment to profile grinding, all are completed internally, and each precision level H/P/SP/UP is truly traceable.
3. Specialized options for harsh environments
Standard metal scraper to resist large particle debris; Optional KK double layer oil scraper, metal scraper, or SH high dustproof for woodworking and graphite workshops. E2 self lubrication module does not require centralized fuel supply and is suitable for heavy duty applications at high altitudes or in clean rooms.
4. Global localization services
Agents are set up in Germany, Türkiye, India and other countries. Multilingual engineers provide 24h remote assistance, and can send our local technical team to the site to guide the parallelism commissioning and preloading adjustment.
How to collaborate with us?
1. Selection consultation: Provide 23 65 mm rail width, length, Z0/ZA/ZB preload class, H/P/SP/UPaccuracy grade. Our team will reply with selection suggestions and send a 3D model and mounting dimension comparison table within 24 hours.
2. Sample testing: For heavy duty applications, it is recommended to purchase 1 to 2 sets of samples for bench testing. The standard specification stock is HRG25 45, and a small sampling fee will be charged for non standard specifications, which will be returned after confirming the order.
3. Order production: Standard products will be shipped within 3 to 5 working days; Non standard customization such as E value, countersunk hole, and extended slider HRG requires 15 20 working days.
4. Logistics and after sales: An installation manual and torque value table will be provided along with the goods. 12 month warranty, lifetime technical support.
Certification Certificate
CE and ISO certification certificates:
Hualong linear guide strictly follows the ISO 9001:2015 control standard and has passed CE certification. This means that the traceability of each guide rail, pre production testing, and chemical composition analysis of each batch of materials are all systematic. The CE and ISO marks represent that our products can directly enter the EU market without the need for secondary rectification. Provide you with visible compliance and reliability.
FAQ
Q: Is the speed of HRG roller guide limited?
A: Recommended ≤ 120 m/min, higher speeds require the use of a ball guide.
Q: Do roller guides need more frequent lubrication?
A: Similar to ball bearings, grease should be replenished every 100 km or 3 to 6 months. Suggest shortening the workload to monthly.
Q: Can HRG and ball guide installation dimensions be interchangeable?
A: The mounting hole spacing and rail width are the same, but the slider height is different, and the bearing height needs to be redesigned.
Q: What is the friction coefficient of roller guide rail?
A: About 0.005 0.008, slightly higher than the 0.004 of the ball, but the starting friction torque is equivalent.
Q: Is it suitable for high dust environments?
A: The standard metal scraper can resist large particles, and for higher protection, KK or SH high dustproof can be selected.
Q: What is the minimum accuracy level of the HRG series?
A: H level meets the requirements of general milling machines, while P level or above is used for precision machining of molds and grinders.
Q: Is the noise of roller guide greater?
A: At the same speed, it is slightly higher than the ball, but by optimizing the roller profile, it has been reduced to below 75dB.
Q: Can E2 self lubricating be installed?
A: Yes, it's possible. Page 57 of the manual provides a size chart for the E2 self lubrication module of the RG series. The E2 self lubrication module is also suitable for the roller type and does not require centralized fuel supply.
Q: How to estimate the lifespan of roller guides?
A: Using the formula L=(C/P)³ × 100 km, the load coefficient fw, hardness coefficient fh, and temperature coefficient ft are the same as the ball bearing version.
Q: Do you provide stainless steel HRG guide rails?
A: Customization is required. The standard is bearing steel, with surface rust proof oil treatment. Special environments can choose black chromium plating or electroless nickel plating.
As one of the leading roller linear guide manufacturers and suppliers in China, our products have good reputation in the market. Please rest assured to wholesale bulk roller linear guide made in China here from our factory. Welcome to view our website for more information.