Description

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Product Specifications

RD Square Guideway is used in the slider cylindrical roller bearing, its total contact area is large, can bear a lot of load, and ball linear guide is used in the slider spherical roller bearing, can bear the load correlation is small.

This has the advantage that the total contact area is small, which corresponds to a smaller frictional resistance.

RD-Square-Guideway01

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Product Structure

Construction-of-RD-Series

Rolling circulation system: Block, Rail, End cap.Circulation path, rollers
Lubrication system: Grease nipple and piping joint
Dust protection system: End seal, Bottom seal,Cap, Double seals and Scraper

Product Features

Optimized Design

RD series roller linear guides feature a smooth, continuous roller recirculation system. Using advanced finite element analysis, the block and rail structures are optimized for maximum performance.

Superior Rigidity in All Directions

Rollers replace balls to create line contact with the rail and block. This minimizes elastic deformation under heavy loads, delivering exceptional rigidity and high-precision motion.

Ultra-High Load Capacity

The DB (45°-45°) configuration supports loads in all directions-vertical and horizontal-allowing the guideway to handle heavy loads in a compact design.

Long Service Life

Designed according to ISO 14728-1, the basic dynamic load rating is based on a 100 km rated life. The actual lifespan depends on the working load, and roller guides offer reliable long-term performance under demanding conditions.

Product Display

Applications of RD Square Guideway

The RD Square Guideway is widely used in various industries and equipment that require high rigidity, precision, and heavy load capacity, including:

Automation systems
Transportation equipment
CNC machining centers
Heavy-duty cutting machines
CNC grinding machines
Injection molding machines
Plano millers
Electric discharge machines (EDM)
Equipment requiring high rigidity
Equipment requiring high load capacity

Accuracy Class

The accuracy of RD series linear slide rail is divided into four levels: high, precision, ultra-precision and ultra-high precision. Customers can choose the accuracy according to the accuracy requirements of the equipment.

Guide rail accuracy grade

1. Accuracy of non-interchangeable

Unit: mm

ltem	RD-15,20.
Accuracy Class	Advanced(H)	Precision level[P]	Ultra-precision level[SP]	Ultra high precision grade[UP)
Dimensional tolerance of height H	± 0.03	0 -0.03	0 -0.015	0 -0.008
Dimensional tolerance of width N	± 0.03	0 -0.03	0 -0.015	0 -0.008
Variation of height H	0.01	0.006	0.004	0.003
Variation of width N	0.01	0.006	0.004	0.003

Unit: mm

Model	RD-25,30,35
Accuracy Class	Advanced(H)	Precision level(P)	Ultra-precision level[SP)	Ultra high precision grade(UP)
Dimensional tolerance of height H	± 0.04	0 -0.04	0	0 -0.01
Dimensional tolerance of height H	± 0.04	0 -0.04	-0.02	0 -0.01
Dimensional tolerance of width N	± 0.04	0 -0.04	0 -0.02	0 -0.01
Variation of height H	0.015	0.007	0.005	0.003
Variation of width N	0.015	0.007	0.005	0.003

Unit: mm

Model	RD-45,55
Accuracy Class	Advanced(H)	Precision level(P)	Ultra-precision level[SP)	Ultra high precision grade[UP]
Dimensional tolerance of height H	± 0.05	0 -0.05	0	0
Dimensional tolerance of height H	± 0.05	0 -0.05	-0.03	-0.02
Dimensional tolerance of width N	± 0.05	0 -0.05	0 -0.03	0 -0.02
Variation of height H	0.015	0.007	0.005	0.003
Variation of width N	0.02	0.01	0.007	0.005

Model	RD-65
Accuracy Class	Advanced (H)	Precision level (P)	Ultra-precision level (SP)	Ultra high precision grade (UP)
Dimensional tolerance of height H	± 0.07	0 -0.07	0 -0.05	0 -0.03
Dimensional tolerance of width N	± 0.07	0 -0.07	0	0
Dimensional tolerance of width N	± 0.07	0 -0.07	-0.05	-0.03
Variation of height H	0.02	0.01	0.007	0.005
Variation of width N	0.025	0.015	0.01	0.007

[2] Accuracy of interchangeable

Unit: mm

Model	RD-15,20.
Accuracy Class	Advanced (H)	Precision level (P)
Dimensional tolerance of height H	± 0.03	± 0.015
Dimensional tolerance of width N	± 0.03	± 0.015
Variation of height H	0.01	0.006
Variation of width N	0.01	0.006

Model	RD-25,30,35
Accuracy Class	Advanced (H)	Precision level (P)
Dimensional tolerance of height H	± 0.04	± 0.02
Dimensional tolerance of width N	± 0.04	± 0.02
Variation of height H	0.015	0.007
Variation of width N	0.015	0.007

Unit; mm

Model	RD-45,55
Accuracy Class	Advanced	Precision level
Accuracy Class	[H]	[P]
Dimensional tolerance of height H	± 0.05	± 0.025
Dimensional tolerance of width N	± 0.05	± 0.025
Variation of height H	0.015	0.007
Variation of width N	0.02	0.01

Unit :mm

Model	RD-65
Accuracy Class	Advanced (H)	Precision grade (P)
Dimensional tolerance of height H	± 0.07	± 0.035
Dimensional tolerance of width N	± 0.07	± 0.035
Variation of height H	0.02	0.01
Variation of width N	0.025	0.015

(3)Accuracy of Running Parallelism

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
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

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Pre-pressure

Chamfering of Linear Guideways

The pre-pressure is to give the roller load force in advance, that is, to increase the diameter of the roller, and to use the negative gap between the roller and the raceway to give the pre-pressure, which can improve the rigidity of the linear slide and eliminate the gap. The RD series linear slide provides the following three standard preloads.

Pre-compression level table

Preservation grade	Code	Pre-pressure	Condition
Light Preload	Z0	0.02C - 0.04C	Certain load direction, lowimpact, low precision required
Medium Preload	ZA	0.07C -0.09C	High rigidity required, high precision required
Heavy Preload	ZB	0.12C - 0.14C	Super high rigidity required, with vibration and impact

Note: 1. In prepressure, C is dynamic rated load

The figure on the right shows the relationship between the rigidity performance, friction resistance and service life of the linear slide under different preloading conditions. Customers can choose the appropriate preloading level according to the rigidity and service life requirements of the equipment, but for small specifications, it is recommended to choose the preloading below the medium preloading to avoid excessive preloading and reduce its service life.

the relationship betweenthe rigidity, friction and nominal life

Product Qualification

DLY products are produced according to ISO9001 standard. All products are 100% during production and before shipment. Our factory offer 12 months warranty for guarantee products quality. Please do not hesitate to cooperate with us.

Delivery, Shipping And Serving

These products are not kept in large stock, so it usually takes about 7–20 days to arrange production and delivery. Due to their heavy weight and long size, shipment is typically made by sea. If you have any requirements, please feel free to contact us for discussion.

FAQ

Q: Can I get a sample?

A: Yes, of course, we will provide samples for cooperation.

Q: How about your price?

A: We will ensure the quality of the products and give you the best price.

Q: Why do we choose your company?

A: Our company has been a professional bearing manufacturer for more than 20 years. We pay more attention to quality. For each shipping, there are professionalisms to check quality of products.

Q: What is the delivery time?

A: We have stock for most of the bearings. For small quantity, we will arrange delivery about 1-5 days, if you need Urgently, please confirm them with us.

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