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A metal linear guide rail with a sliding block and handle. The rail has green and red end caps and allows smooth, precise movement for machinery or industrial equipment.

PG Series

PG Series Positioning Guideway

Block Type
Square (H, L), Flange (W)
Model Size
20 - 55
Load Type
Heavy, Super Heavy
Dynamic Load Rating
27.1 [kN] - 184.9 [kN]
Sensor Resolution
Up to 1 [µm] (external digital sensors)
Repeatability
±1 [µm] - ±10 [µm] (by sensor type)
Measuring Length
Up to 25 [m]

Start customizing your product with our configurator

Hiwin's positioning guideway system integrates a linear guideway with a magnetic encoder. This solution offers the high stiffness and rigidity of a guideway while obtaining high precision from the magnetic encoder. The encoder is a non-contact measuring sensor and the magnetic strip is embedded to prevent possible damage caused from external materials. These features ensure a longer service life.

The measuring side of a PG axis is the Incremental Position Measurement System. The standard sensor S fits sizes 20–55 and external A, D and CD sensors fit sizes 20–45, all reading the magnetic scale embedded in this rail. View Incremental Position Measurement System →

Applications

  • Oily, dusty and high-vibration environments
  • High-humidity and high-temperature environments
  • Long-travel position measurement (up to 25 m)

Variants

The second letter is the block type: PGHH square, PGHW flange, PGHL low-profile square (sizes 25-55 only). After the size, C is heavy load and H super heavy load; the final letter is the block mounting direction, A from the top, B from the bottom, C either (B and C mountings are catalogued for flange blocks).

Part Number Block Type Model Size (mm) Load Type Dynamic Load Rating (kN) Configure
PGHH20CA Square 20 Heavy 27.1 Configure ↗
PGHH20HA Square 20 Super Heavy 32.7 Configure ↗
PGHH25CA Square 25 Heavy 34.9 Configure ↗
PGHH25HA Square 25 Super Heavy 42.2 Configure ↗
PGHH30CA Square 30 Heavy 48.5 Configure ↗
PGHH30HA Square 30 Super Heavy 58.6 Configure ↗
PGHH35CA Square 35 Heavy 64.6 Configure ↗
PGHH35HA Square 35 Super Heavy 77.9 Configure ↗
PGHH45CA Square 45 Heavy 103.8 Configure ↗
PGHH45HA Square 45 Super Heavy 125.3 Configure ↗
PGHH55CA Square 55 Heavy 153.2 Configure ↗
PGHH55HA Square 55 Super Heavy 184.9 Configure ↗
PGHW20CA Flange 20 Heavy 27.1 Configure ↗
PGHW20HA Flange 20 Super Heavy 32.7 Configure ↗
PGHW25CA Flange 25 Heavy 34.9 Configure ↗
PGHW25HA Flange 25 Super Heavy 42.2 Configure ↗
PGHW30CA Flange 30 Heavy 48.5 Configure ↗
PGHW30HA Flange 30 Super Heavy 58.6 Configure ↗
PGHW35CA Flange 35 Heavy 64.6 Configure ↗
PGHW35HA Flange 35 Super Heavy 77.9 Configure ↗
PGHW45CA Flange 45 Heavy 103.8 Configure ↗
PGHW45HA Flange 45 Super Heavy 125.3 Configure ↗
PGHW55CA Flange 55 Heavy 153.2 Configure ↗
PGHW55HA Flange 55 Super Heavy 184.9 Configure ↗
PGHW20CB Flange 20 Heavy 27.1 Configure ↗
PGHW20HB Flange 20 Super Heavy 32.7 Configure ↗
PGHW25CB Flange 25 Heavy 34.9 Configure ↗
PGHW25HB Flange 25 Super Heavy 42.2 Configure ↗
PGHW30CB Flange 30 Heavy 48.5 Configure ↗
PGHW30HB Flange 30 Super Heavy 58.6 Configure ↗
PGHW35CB Flange 35 Heavy 64.6 Configure ↗
PGHW35HB Flange 35 Super Heavy 77.9 Configure ↗
PGHW45CB Flange 45 Heavy 103.8 Configure ↗
PGHW45HB Flange 45 Super Heavy 125.3 Configure ↗
PGHW55CB Flange 55 Heavy 153.2 Configure ↗
PGHW55HB Flange 55 Super Heavy 184.9 Configure ↗
PGHW20CC Flange 20 Heavy 27.1 Configure ↗
PGHW20HC Flange 20 Super Heavy 32.7 Configure ↗
PGHW25CC Flange 25 Heavy 34.9 Configure ↗
PGHW25HC Flange 25 Super Heavy 42.2 Configure ↗
PGHW30CC Flange 30 Heavy 48.5 Configure ↗
PGHW30HC Flange 30 Super Heavy 58.6 Configure ↗
PGHW35CC Flange 35 Heavy 64.6 Configure ↗
PGHW35HC Flange 35 Super Heavy 77.9 Configure ↗
PGHW45CC Flange 45 Heavy 103.8 Configure ↗
PGHW45HC Flange 45 Super Heavy 125.3 Configure ↗
PGHW55CC Flange 55 Heavy 153.2 Configure ↗
PGHW55HC Flange 55 Super Heavy 184.9 Configure ↗
PGHL25CA Square (low) 25 Heavy 34.9 Configure ↗
PGHL25HA Square (low) 25 Super Heavy 42.2 Configure ↗
PGHL30CA Square (low) 30 Heavy 48.5 Configure ↗
PGHL30HA Square (low) 30 Super Heavy 58.6 Configure ↗
PGHL35CA Square (low) 35 Heavy 64.6 Configure ↗
PGHL35HA Square (low) 35 Super Heavy 77.9 Configure ↗
PGHL45CA Square (low) 45 Heavy 103.8 Configure ↗
PGHL45HA Square (low) 45 Super Heavy 125.3 Configure ↗
PGHL55CA Square (low) 55 Heavy 153.2 Configure ↗
PGHL55HA Square (low) 55 Super Heavy 184.9 Configure ↗

Part numbers & options

How a part number reads

PGH W 25 C A E 1/2 T 1600 E ZA P I / II / E2 + KK + measuring module (spaces between decoded positions)

PGH
Series — PGH positioning guideway
W
Block type — W flange · H square · L square (low)
25
Model size — 20 · 25 · 30 · 35 · 45 · 55
C
Load type — C heavy · H super heavy
A
Block mounting type — A from top · B from bottom · C top or bottom
E
Block build — E special block · none standard block
1
Blocks with sensor — total per rail
2
Blocks per rail — total count
T
Rail mounting type — R from top · T from bottom (bottom mounting affixes the magnetic strip to the rail)
1600
Rail length — in mm
E
Rail build — E special rail · none standard rail
ZA
Preload code — Z0 light · ZA medium · ZB heavy
P
Precision code — C · H · P · SP · UP
I
Rails with magnetic strip — count per axis
II
Rails per axis — count
E2
Lubrication — E2 self-lubricant block · blank standard block
KK
Dust protection — DD · ZZ · KK
+S+01 1 10+A 1 1+S32
Position measuring module — sensor (S standard 5 mm pole pitch · A external analog 1 mm · D external digital 1 mm · CD external digital 2 mm high precision) · cable length 01–25 m · connector 0–8 · 10 standard / 11 metal tube · signal translator A (standard sensor only) · resolution (1 = 5 µm · 2 = 10 µm) · output signal (1 = 5V RS422/TTL · 2 = 24V open collector) · display (LD · UPLD · H10 · H11 · S32 · S33 · S42 · S43)

The configurator assembles this number for you, with drawings and 3D CAD. Configure ↗

Accuracy classes

Five classes from Normal to Ultra Precision. Height and width tolerances tighten from ±0.1 mm at Normal to 0/-0.01 mm at Ultra Precision, with running parallelism tabulated by rail length; PGH 20, 45 and 55 follow the HG-series accuracy standards.

  • C Normal — General positioning work where the encoder, not the rail geometry, carries the accuracy budget.
  • H High — Automation and transfer equipment needing consistent travel accuracy.
  • P Precision — Machine tools and measuring equipment; height tolerance closes to 0/-0.04 mm.
  • SP Super Precision — High-precision stages where geometric error must stay within a few microns per rail section.
  • UP Ultra Precision — The tightest class: 0/-0.01 mm dimensional tolerance and 2 µm running parallelism on short rails.

Preload

Preload is set as a fraction of the basic dynamic load rating C.

  • Z0 Light Preload — 0-0.02C. Smooth, low-friction motion for light, constant loads.
  • ZA Medium Preload — 0.05C-0.07C. The general-purpose setting for positioning applications.
  • ZB Heavy Preload — 0.10C-0.12C. Maximum stiffness for machine tools and high-vibration installations.

Other Linear Guideways

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How buying works

Spec it in the configurator: drawings, 3D CAD, and a quote to follow.

HIWIN series are configured to your application, not bought off the shelf. Start from your loads and speeds if you are still choosing a size.

Rather talk it through? Request a quote from an application engineer.