High Precision Cross Roller Rail and Block Assembly

High Precision Cross Roller Rail and Block Assembly a stationary base and a moving carriage low-friction motion high load

 

The Cross Roller Guide is a limited stroke linear guide that has precision rollers orthogonalized alternately. This product provides rigid yet supple linear motion and is particularly suitable for linear guidance where high rigidity and supple movement is demanded.;

Structure and Characteristic:

Cross Rail and Block Assembly is made of two V- raceway Guide Rail, Roller Cage, Cylindrical Roller and so on, Intersect Lined cylindrical roller do reciprocating motion via grinding V-raceway surface guide rail. Can withstand various loadings to achieve high precision ,smooth and reliable linear motion.

Small rolling friction resistance, stable performance; Small Friction on start, with good dynamic performance; With big Contact area, and a small amount of elastic variety, effective body movement, and easy to achieve high rigidity, high load exercise; The structural design is flexible, easy to install;

The Stroke Length and Roller Numbers

Guideway length Calculation

The guideway length is not less than 1.5 times of the stroke; L>=1.51

Remarks: L: Guideway length (mm); L1: Stroke Length (mm)

Cages length: K<=L-L1/2

Remarks: K: Cages Length (mm)

Calculation of Roller Numbers: n= (K-2a)/f+1

Remarks: n: Roller Numbers (the Decimal Part is ignored)

a: End to End Distance of the cage   f: Space between Rollers

SIZE ITEM NO	Dw(mm)	a(mm)	f(mm)	B(mm)	C1(KN)	C01(KN)
LBV1	1.5	1.5	2.5	3.8	0.107	0.118
LBV2	2	2	4	5.6	0.263	0.274
LBV3	3	2.5	5	7.6	0.545	0.597
LBV4	4	5	7	10	1.05	1.16
LBV6	6	6	9	14	2.06	2.41
LBV9	9	9.5	14	21	5.904	6.74
LBV12	12	10	20	25	12.15	13.77
LBV15	15	14	22	34	19.62	22.32

C1=Rated Dynamic Loading of each Cylindrical Roller;   C01=Rated Static Loading of each Cylindrical Roller;

Precision  For matched Mounting Surface

The Structure of crossing roller guideways matched mounting surface is showing as the below:

The Precision of matched mounting surface influences the precision and function of movement directly, so it is better to improve the mounting surfaces precision by getting higher precision.

A side: Its precision directly influence the movement precision;

B&C sides: Parallelism directly influence preloading;

Verticality: Verticality opposite to A side influences the rigidity that installed preloading directions

Therefore, we suggest to improve the precision on mounting surface, and the precision valve must border on parallelism value.

Preloading Methods

Showing as the right drawing, the preloading is usually adjusted by preloading adjusted screws,whose size and specification are the same as the installing screws, the screw center is the half of the guideways height

The preloading value varied from machine tools to machine tools and equipments to equipments, Over preloading will decrease the guideways lifespan and damage the raceway, at the same time, the cylindrical rollers will be easily deflected and locked by themselves when in the operation, Therefore, we usually recommend to use 0 preloading or less preloading.

If Higher precision and rigidity are required. The below assembly board as left drawing or the wedge block as the right will be recommended;

Crossing roller guideway can be operated in high temperature, but not more than 100

The speed should better not more than 30m/min

Grease:

The function for grease is to decrease the friction and fray, when the speed is higher (V>=15m/min).grease N32 (GB443-84) will be recommend, when in 40 and the movement viscosity is 28.8-35.2mm2/S, It only needs to grease constantly or imperatively; when the speed is lower( V<15m/min),lithium greast (GB7324-942#) will be recommended;

High Precision Cross Roller Rail and Block Assembly