Linear Guide Roller Bearing Sliding Rail

 

The linear guide roller bearing sliding rail is a type of mechanical component designed to achieve precise linear motion while bearing heavy loads.
It is mainly used in combination with the RD series slider, forming a stable and smooth linear motion system.
With its compact design, high rigidity, and excellent motion accuracy, the linear guide roller bearing sliding rail is widely applied across industries such as automation equipment, packaging machinery, woodworking machinery, and CNC systems.

 

 

RD Series Linear Guide Roller Bearing Sliding Rail

 

The RD series linear guide roller bearing sliding rail is available in two types: interchangeable and non-interchangeable.
Both types share the same specifications and dimensions, but differ in compatibility and assembly precision.

 

The interchangeable linear slide rail allows the slider block and rail to be replaced or combined freely, offering greater flexibility and convenience during installation and maintenance.
However, its combined accuracy is slightly lower than that of the non-interchangeable type, which is designed for ultra-precision applications requiring strict assembly tolerances.

 

Thanks to advanced manufacturing processes, the interchangeable RD series-comparable to HIWIN's interchangeable type-now achieves high-level precision performance, making it an ideal option for customers who do not require paired installation.

 

The specifications and model codes of the linear slide indicate parameters such as size, type, precision grade, and preload level, helping both suppliers and customers accurately confirm product details during ordering.

 

Lubrication Method

 

(1) Grease

Nozzle type

Position of nozzle

 

According to customer's requirements, the front end or rear end of the slider is equipped with oil nozzles for manual oil pumping, and the RD series of linear guide roller bearing sliding rails are specially reserved for oil holes on the side and above of the end cover to install oil nozzles (usually straight oil nozzles) to provide lateral and upper oil pumping. The position of lateral oiling is recommended to be on the non-side datum edge, but it can also be placed on the side datum edge if there is special need. If the customer has the above side oil or top oil demand, please contact us. If the linear slide rail with automatic lubricating grease supply is used, the oil pipe joint can be installed according to the type of connecting pipe.

---

Contact now

 

O-Ring Specifications and Perforation Maximum Allowable Depth

 

Specifications	O-Ring specifications		Maximum allowable depth of perforation Tmax (mm)
	do (mm)	W (mm)
RD 15			3.45
RD 20			4
RD 25			5.8
RD 30			6.2
RD 35			8.65
RD 45			9.5
RD 55			11.6
RD 65			14.5

 

---

 

O Single slider filled with lubricating oil

 

Single slider grease oil quantity

Specifications	Medium load (cm3)	Heavy load [cm3]	Specifications	Medium load [cm3]	Heavy load (cm]]
RD 15	3	-	RD 35	12	14
RD 20	5	6	RD 45	19	23
RD 25	7	8	RD 55	28	35
RD 30	9	10	RD 65	52	63

 

---

 

Lubrication frequency

Confirm grease every 100km of operation, or every 3 to 6 months.

 

(2) Lubricating oil

The construction waste uses lubricating oil with viscous force of about 30 ~ 150cSt to lubricate the linear slide rail. The customer can first explain to us that oil lubrication is required, and the shipped linear slide rail will not be sealed with lubricating oil.

 

(3) Oil supply rate

oil supply rate

Specifications	oil supply rate [cm3/hr)
RD 15	0.14
RD 20	0.14
RD 25	0.167
RD 30	0.2
RD 35	0.23
RD 45	0.3
RD 55	0.367
RD 65	0.433

 

---

 

(4) Walking parallelism accuracy

 

Rail length [mm)	Accuracy class (μm) H	P	SP	UP
~ 100	7	3	2	2
100-200	9	4	2	2
200~300	10	5	3	2
300-500	12	6	3	2
500-700	13	7	4	2
700~900	15	8	5	3
900-1,100	16	9	6	3
1,100-1,500	18	11	7	4
1,500-1,900	20	13	8	4
1,900-2,500	22	15	10	5
2,500-3,100	25	18	11	6
3,100-3,600	27	20	14	7
3,600-4,000	28	21	15	7

 

 

• Scraper blade and bottom dust-proof blade

Prevent the processing of iron or dust particles into the slider, damage the surface of the bead and reduce the life of the linear slide.

• Double-layer oil scraper

Double the scraping effect, even in the heavy cutting environment, foreign matter is completely excluded from the slider.

oil scraper blade

Specifications	Thickness [t1) [mm)	Specifications	Thickness [t1] [mm]
RD 15 ES	2.2	RD 35 ES	2.5
RD 20 ES	2.2	RD 45 ES	3.6
RD 25 ES	2.2	RD 55 ES	3.6
RD 30 ES	2.4	RD 65 ES	4.4

 

---

 

•  Metal Scraper

Can isolate high temperature iron filings or machining sparks, and exclude large volume impurities.

metal scraper

Specifications	Thickness [t2) [mm]	Specifications	Thickness [t2] [mm]
RD 15 SC	1.0	RD 35 SC	1.5
RD 20 SC	1.0	RD 45 SC	1.5
RD 25 SC	1.0	RD 55 SC	1.5
RD 30 SC	1.5	RD 65 SC	1.5

 

---

 

• Bolt cover :linear guide roller bearing sliding rail

In order to prevent cutting powder or foreign matter from invading the slider through the bolt hole and affecting the accuracy, the customer must drive the bolt cover into the bolt hole when installing the slide rail, and each slide rail is equipped with a bolt cover when it is removed.

Slide rail dust cover

Slide rail specification	Mounting screws	Diameter (D) [mm)	Thickness (H) [mm)	Slide rail specification	Mounting screws	Diameter [D] [mm]	Thickness [H] [mm]
RDR15	M4	7.65	1.1	RDR35	M8	14.20	3.3
RDR20	M5	9.65	2.2	RDR45	M12	20.25	4.6
RDR25	M6	11.15	2.5	RDR55	M14	23.5	5.5
RDR30	M8	14.20	3.3	RDR65	M16	26.6	5.5

 

---

 

• Dustproof code slider total length

Unit of total length of slider :mm

Specifications	Total length of slider [L]
	Standard	ZZ	DD	KK
RD15C	68	70	72.4	74.4
RD20C	86	88	90.4	92.4
RD20H	106	108	110.4	112.4
RD25C	97.9	99.9	102.3	104.3
RD25H	114.4	116.4	118.8	120.8
RD30C	109.8	112.8	114.6	117.6
RD30H	131.8	134.8	136.6	139.6
RD35C	124	127	129	132
RD35H	151.5	154.5	156.5	159.5
RD45C	153.2	156.2	160.4	163.4
RD45H	187	190	194.2	197.2
RD55C	183.7	186.7	190.9	193.9
RD55H	232	235	239.2	242.2
RD65C	232	235	240.8	243.8
RD65H	295	298	303.8	306.8

 

---

 

• Friction

This resistance value is the maximum resistance of a single oil scraper blade.

RD series scraper blade resistance

Specifications	Scraper resistance N(kgf)	Specifications	Scraper resistance N[kgf]
RD15	1.96 (0.2)	RD35	3.53 (0.36)
RD20	2.45 (0.25)	RD45	4.21 (0.43)
RD25	2.74 (0.28)	RD55	5.09 (0.52)
RD30	3.31 (0.31)	RD65	6.66 (0.68)

 

 

---

 

Type	Role	Sample files/data
Certificate	Demonstrable product compliance with industry standards	ISO 9001, CE, RoHS, DIN certification
Test Report	Verify product performance parameters	Load testing, fatigue life, coefficient of friction
Material Proof	Clear material composition and heat treatment state	Chemical composition report, metallographic analysis
Patent or design documents	Confirm intellectual property or structural compliance	Patent certificates, 3D models, engineering drawings

 

 

Bearing surface parallelism error [P]

Allowable maximum parallelism error (P) of medical grid Unit: μm

Specifications	Preservation grade Light preloading (zo)	Medium prepressure (ZA)	Heavy preloading (zB)
RD15	5	3	3
RD20	8	6	4
RD25	9	7	5
RD30	11	8	6
RD35	14	10	7
RD45	17	13	9
RD55	21	14	11
RD65	27	18	14

 

---

 

Bearing surface parallelism error (S1)

S1: Maximum allowable error of height

a: Paired rail spacing

K: height error coefficient

height error coefficient

Specifications	Preservation grade
	light preloading izo1	Medium prepressure (ZAI	Heavy preloading (ZB)
K

 

---

 

 

Full-cycle service coverage

 

Stage	Service Content	User Value
Pre-sales	Free technical advice, selection recommend	Reduce procurement risk and avoid technical adaptation issues
In Sale	Logistics tracking, installation guidance	Ensure delivery efficiency and reduce installation errors
After sales	Quality Assurance Service, Lifetime Maintenance	Extend product life cycle and increase repurchase rate

 

Contact now

 

Hot Tags: linear guide roller bearing sliding rail, China linear guide roller bearing sliding rail manufacturers, suppliers, factory, High Precision Linear Guide, Linear Guide Rail Heavy Duty, , linear motion guide