CPC linear motion guideways
CPC Linear Motion Guideways
CPC (Chieftek) profile rail linear guides -- ARC, HRC, ERC, WRC, ARD, HRD, ERD, ARR, HRR and LRR families with catalogue engineering data, preload, accuracy and ordering support.
CPC linear guide families
CPC (Chieftek Precision Co.) manufactures four-row ball bearing and roller-type profile rail linear guides. Documented ball series include ARC (automation), HRC (heavy load), ERC (heavy load alternative configuration), and WRC (wide rail). Cover-strip variants are ARD, HRD and ERD. Roller series are ARR (low profile), HRR (standard profile) and LRR (extremely low profile).
Size table by series
Catalogue-documented size envelopes. ERC 25 and ERD 25 only. WRC 21/15 and WRC 27/20. Roller series ARR, HRR and LRR omit size 30.
| Series | Sizes | S | N | L | XL/FXL | Six-hole (-R) |
|---|---|---|---|---|---|---|
| ARC | 15, 20, 25, 30, 35, 45, 55 | Yes | Yes | Yes | No | No |
| HRC | 15, 20, 25, 30, 35, 45, 55 | No | Yes | Yes | No | Yes |
| ERC | ERC 25 only (MS, MN, ML documented) | Yes | Yes | Yes | No | Yes |
| WRC | WRC 21/15, WRC 27/20 | No | Yes | No | No | No |
| ARD | 15, 20, 25, 30, 35, 45, 55 | Yes | Yes | Yes | No | No |
| HRD | 15, 20, 25, 30, 35, 45, 55 | No | Yes | Yes | No | Yes |
| ERD | 25 only | Yes | Yes | Yes | No | Yes |
| ARR | 15, 20, 25, 35, 45, 55 (no size 30) | No | Yes | Yes | Yes | No |
| HRR | 15, 20, 25, 35, 45, 55 (no size 30) | No | Yes | Yes | Yes | No |
| LRR | 15, 20, 25, 35, 45, 55 (no size 30) | No | Yes | Yes | Yes | No |
Ball vs roller comparison
Structural and performance differences between CPC ball and roller guides:
| Dimension | Ball guides (ARC/HRC/ERC/WRC) | Roller guides (ARR/HRR/LRR) |
|---|---|---|
| Contact geometry | Point contact (spherical balls) | Line contact (cylindrical rollers) |
| Load capacity C0 | Standard load capacity | Significantly higher; size 55 long roller 36% higher than ball example |
| Moment stiffness | Standard moment rigidity | Ultra-high; MXL roller 22% higher than long roller example |
| Friction factor | Low start-up and running friction | mu approx 0.001 to 0.002; slightly higher than ball |
| Structural deflection | Increases non-linearly under load | 40% to 50% of comparable ball guide under identical down load |
| Service life ratio | Baseline dynamic life | 3.7x to 5.8x longer than ball under identical load P |
System limits (speed, acceleration, temperature)
Catalogue system limits for CPC linear guides:
| Parameter | Ball guides | Roller guides |
|---|---|---|
| Maximum linear speed | Vmax >= 10 m/s | Vmax = 10 m/s |
| Maximum acceleration | amax = 450 m/s^2 | Not specified in catalogue for rollers |
| Continuous temperature | -40 C to 80 C | -40 C to 80 C |
| Short-term peak temperature | +100 C | +100 C |
Preload classes
Ball guide preload (ARC, HRC, ERC, WRC):
| Code | Preload | Application |
|---|---|---|
| VC | Clearance (+5 to +0 um) | Smooth motion, lowest friction |
| V0 | Light: 0.02C | Precision setups, smooth movement under light load |
| V1 | Medium: 0.05C | High stiffness, high load, precision installations |
| V2 | Heavy: 0.08C to 0.13C | Super high stiffness, maximum precision, ultra-heavy load |
Roller guide preload (ARR, HRR, LRR):
| Code | Preload | Application |
|---|---|---|
| V0 | Light: 0.03C | Smooth motion, low friction in precision setups |
| V1 | Medium: 0.08C | High stiffness, high load, high precision machine tools |
| V2 | Heavy: 0.13C | Extreme rigidity for machining centres and lathes |
Accuracy grades
Accuracy tolerances in micrometres from the CPC catalogue. Roller guides use UP, SP, P and H grades (Normal N not available).
Sizes 15 to 20
| Grade | Height tol. | Width tol. | Height var. | Width var. |
|---|---|---|---|---|
| UP | ±5 um | ±5 um | 3 um | 3 um |
| SP | ±10 um | ±7 um | 5 um | 5 um |
| P | ±15 um | ±10 um | 6 um | 7 um |
| H | ±30 um | ±20 um | 10 um | 15 um |
| N (ball only) | ±70 um | ±40 um | 20 um | 30 um |
Sizes 25 to 35
| Grade | Height tol. | Width tol. | Height var. | Width var. |
|---|---|---|---|---|
| UP | ±5 um | ±5 um | 3 um | 3 um |
| SP | ±10 um | ±7 um | 5 um | 5 um |
| P | ±20 um | ±10 um | 7 um | 7 um |
| H | ±40 um | ±20 um | 15 um | 15 um |
| N (ball only) | ±80 um | ±40 um | 20 um | 30 um |
Sizes 45 to 55
| Grade | Height tol. | Width tol. | Height var. | Width var. |
|---|---|---|---|---|
| UP | ±5 um | ±5 um | 3 um | 3 um |
| SP | ±10 um | ±7 um | 5 um | 5 um |
| P | ±20 um | ±10 um | 7 um | 7 um |
| H | ±40 um | ±20 um | 15 um | 15 um |
| N (ball only) | ±80 um | ±40 um | 25 um | 30 um |
Engineering context
Engineering reference
ARC ball guide ordering decoder
Example ball guide code: ARC 15 N -RM B 2 Z C V1 P /JI I-20-20-1480LU
- ARC -- Automation series ball guide.
- 15 -- Size.
- N -- Standard block length.
- -R -- Six mounting holes (when specified).
- M -- Standard width block.
- B -- Low friction seal.
- 2 -- Two blocks per rail.
- Z -- Inner PU lubrication storage pad.
- C -- Ball chain recirculation.
- V1 -- Medium preload (0.05C).
- P -- Precision accuracy grade.
- /JI I-20-20-1480LU -- Customization, inspection report, hole pitches and rail length with bottom tapping.
Engineering reference
ARR roller guide ordering decoder
Example roller guide code: ARR 35 NM S 2 Z C V1 P /JI I-20-O--20-1480LU
- ARR -- Low profile roller guide.
- 35 -- Size.
- NM -- Standard width, standard block length.
- S -- Standard contact seals.
- 2 -- Two blocks per rail.
- Z -- PU lubrication storage pad.
- C -- Silent roller chain.
- V1 -- Medium preload (0.08C).
- P -- Precision accuracy grade.
- /JI... -- Customization suffixes, lubrication type O for oil, rail suffixes for pitch and length.
Customization codes
Suffix codes appended after accuracy/preload section:
| Code | Meaning |
|---|---|
| J | Butt-jointed slide rail connection for lengths exceeding 4 m |
| I | Delivered with official inspection report |
| S | Special straightness requirements for the rail |
| B | Special customized processing for the block |
| PC | Rail counterbores fitted with plastic caps |
| MPC | Rail counterbores fitted with metal-plastic caps |
| SN | External NBR seal with metal scraper |
| HN | External HNBR seal with metal scraper |
| BL | Extension and contraction support layer for bellows mounting |
| BR / BB / BRB | Black chrome coating on rail, block, or both |
| CR / CB / CRB | Clear chrome coating on rail, block, or both |
| NR / NB / NRB | Nickel coating on rail, block, or both |
| RR / RB / RRB | Raydent coating on rail, block, or both |
| OA | Block installed with standard grease nipple |
| SG | Side grease holes and set screws |
| SB | Stainless steel ball bearings in block |
| DE | Reference edges on opposite sides of block and rail |
| VD | Customized designated preload pressure value |
| TR | Rail bolt-holes without chamfers |
When to specify each CPC series
Engineering theme
ARC
Maximum linear speed (10 m/s) and high acceleration (450 m/s^2) in packaging, warehousing and semiconductor pick-and-place.
Engineering theme
HRC
Heavy radial or lateral loads; six-hole -R configuration for shock loads.
Engineering theme
ERC
Heavy load ball guide with alternative physical configurations; size 25 documented in catalogue.
Engineering theme
WRC
Wide rail for high overturning moments where dual rails cannot fit.
Engineering theme
ARD / HRD / ERD
Cover strip protection in high-contaminant environments.
Engineering theme
ARR / HRR
Precision heavy metal cutting where zero deflection and vibration dampening are mandatory.
Engineering theme
LRR
Extremely low profile roller for space-constrained heavy builds with low centre of gravity.
Evidence and commercial boundary
CPC model tables on this page are bounded to the supplied catalogue extract. ERC and ERD sizes beyond 25, WRC sizes beyond 21/15 and 27/20, roller size 30, and roller maximum acceleration are not specified in the catalogue. Listing CPC does not imply Golden Bearing Company distributes, stocks, authorises or represents CPC unless separately confirmed. Share complete rail/block designation for quotation.
Common questions
ARC (automation), HRC (heavy load), ERC (heavy load alternative), WRC (wide rail), plus cover-strip variants ARD, HRD and ERD. Standard ball bearing models in the supplied catalogue are designated under ARC, HRC or ERC family codes.
ERC 25 and ERD 25 are documented in the catalogue (ERC 25 MS, ERC 25 MN, ERC 25 ML). WRC wide rail sizes are WRC 21/15 and WRC 27/20 in the catalogue tables.
No. ARR, HRR and LRR roller series are documented for sizes 15, 20, 25, 35, 45 and 55. Size 30 is not specified in the catalogue for roller guides.
VC is clearance (+5 to +0 um). V0 is light preload (0.02C). V1 is medium preload (0.05C). V2 is heavy preload (0.08C to 0.13C).
Ball linear guides reach Vmax >= 10 m/s and amax = 450 m/s^2. Continuous operating temperature is -40 C to 80 C.
Roller guides use line contact for higher load capacity and rigidity. Under identical down load, deformation is 40% to 50% of a comparable ball guide. Service life can be 3.7x to 5.8x longer under identical load P.
See the ARC and ARR ordering decoders on this page. Example ARC: ARC 15 N -RM B 2 Z C V1 P /JI I-20-20-1480LU. Example ARR: ARR 35 NM S 2 Z C V1 P /JI I-20-O--20-1480LU.
Codes include J (butt-jointed rails), I (inspection report), PC/MPC (hole caps), SN/HN (scraper seals), coating codes BR/CR/NR/RR families, OA (grease nipple), SG (side grease holes) and others listed in the customization table.
Request an Engineering Quote
Share shaft bore, speed, torque duty and ordering designation for CPC Linear Motion Guideways. Send CPC series (ARC, HRC, ERC, WRC, ARR, etc.), size, block length, preload, accuracy grade, stroke and load duty for engineering quotation.