Linear Guideway

I. Complete Part-Number Structure (HIWIN Example)

HGW25CA2R1600ZAPⅡ DD

1. HG: Series (high-assembly ball-type guideway)
2. W: Slider shape (W = flange type; H = square type)
3. 25: Rail width 25 mm (core specification)
4. C: Standard slider length (H = extended-length slider)
5. A: Top-mounting hole configuration (common for flange sliders)
6. 2: Quantity of sliders per rail
7. R: Top-mounting rail
8. 1600: Rail length (mm)
9. ZA: Preload grade (Z0 = no preload; ZA = light preload; ZB = medium preload)
10. P: Precision grade (C = normal; H = high; P = precision; SP/UP = superprecision)
11. Ⅱ: Matched set of 2 rail assemblies
12. DD: Dust-proof accessory (standard / reinforced / metal scraper)

II. Mainstream Series and Applications

1. Ball-type (most widely used)

HG (high-assembly): Four-row balls, heavy-load capacity and high rigidity; size range 15-65 mm; for machine tools and general automation equipment.

EG (low-assembly): Compact and lightweight; size range 9-30 mm; for small-size machinery and linear modules.

MGN / MGW (miniature): Size range 3-15 mm; for precision instruments and semiconductor equipment.

2. Roller-type (heavy-duty)

RG: Roller-contact design; rigidity is 2-3 times higher than ball-type guides; size range 25-65 mm; for heavy-cutting machine tools, gantry systems and heavy-duty machinery.

3. Low-noise / Special-purpose

QG: Low0noise version; for medical equipment and clean-room environments.

Stainless-steel series: Rust-resistant; for food-processing, medical and outdoor-application scenarios.

IV. Precision and Preload (Key Performance Parameters)

1. Precision Grades (Running parallelism)

C (Normal): ±0.1 mm; general-purpose automation

H (High): ±0.03 mm; precision-grade machinery

P (Precision): ±0.01 mm; machine tools and laser-processing equipment

SP / UP (Super-precision): ±0.005 mm; semiconductor and inspection-measurement equipment

2. Preload Grades (Eliminate clearance, improve rigidity)

Z0: No preload; light-load, low-speed conditions

ZA (Z1): Light preload; general-purpose and cantilever-load applications

ZB (Z2): Medium preload; heavy-load and cutting-process applications

Model	Wr(mm)	H(mm)	W(mm)	L(mm)	Cr(kN)	Cor(kN)	max speed (m/min)	Slider W₁(kg)	Guideway W₂(kg/m)
HGH15CA	15	24	34	57.5	12.8	19.2	240	0.20	1.31
HGH20CA	20	30	44	77.5	27.1	36.7	240	0.30	2.21
HGH25CA	23	36	48	84.0	34.9	52.8	240	0.51	3.21
HGH30CA	28	42	60	97.4	48.5	71.9	220	0.78	4.47
HGH35CA	34	48	70	109.4	64.2	94.5	220	1.12	6.30
HGH45CA	45	60	86	134.0	93.3	137	180	2.10	9.60
HGH55CA	53	70	100	160.0	138	202	180	3.35	13.9