Manufacturer of Linear Motion SystemsManufacturer of Linear Motion Systems
4215 Pleasant Rd
Fort Mill, SC 29708

Customer Service

800-284-9784

Manufacturer of Linear Motion SystemsManufacturer of Linear Motion Systems

Curved Rail Linear System (CR40 Series)


For applications where you don’t want to move in a straight line, we offer our curved rail linear guide products.

The rails are machined from carbon steel blanks, then surface heat treated to provide a hard wear resistant surface.   Additional post treatment results in a satin black color appearance.  Standard catalog products available now are straight, 90-degree turn, and 180 degree turn rail sections.   These are standard off-the-shelf items for those who wish to build their own systems.   CR40 Series Carriages are designed with three cam roller wheels for smooth movement.

CR40 Curved Rail Product Family

For OEM applications we will make “custom” rail sections.


For many applications our standard catalog offering listed below will allow you to construct a complete system.

Below is a list of components required to make the example closed loop curved rail system in the sketch below.

CR40 Example System

Example Bill of Materials (BOM)

Part Number Description Qty
1CR40-L470-NBStraight Rail Section, Length is 470 mm2
2CR40-R200-A180-NB180 Deg, 200 mm radius Turn Section2
3CR40-C3-M6-NBCarriage with M6 threaded holes1

Rail sections for any of the straight or turn pieces can be "butt" join together to allow smooth transition of the carriage as it moves along the track.

To assist in making the best possible alignment on your end during installation, it is advisable to purchase an alignment tool.

It is important to also note that the base upon which you install the rail sections should machined flat and of good structural integrity.

CR40 Alignment Tool Photo of alignment tool

CR40 Series Rail Section Features

  • Black Color Satin Finish Appearance
  • Heat Treated Surface Hardened Rails
  • Straight Rail Lengths up to 1220 mm (48 inches)
  • 90 Degree Turn Sections with radius of 150 mm
  • 180 Degree Turn Sections with radius as small as 100 mm

Typical Lead-time is 2-3 days



Carriage and Rail Assembly Photos


CR40 Rail and Block Assembly End View

Below are photos of the CR40-C3-NO-NB Carriage with and without a straight rail section.

CR40 Assembly View 01
CR40 Assembly View 02
CR40 Assembly End View Drawing

Carriage assembly is made of square shaped plate (12.7 mm thick) with three cam roller bearings attached. It is made of unhardened steel to allow for additional machining if customer wishes to add their own mounting holes.

Total height from bottom of rail to top of carriage is 28.7 mm.

Clearance between the bottom of the each cam roller to the bottom of the rail is approximately 1.3 mm.

CR40 Carriage Preload Adjustment Screw
CR40 Carriage with M6 Holes
CR40 Carriage with No Holes

Below is a list of available Carriage Assemblies ready and in stock.

   PART NUMBER    Series
Size
Axial
Static
Load Cap.

(N)
Axial
Static
Load Cap.

(lbs)
Radial
Static
Load Cap.

(N)
Radial
Static
Load Cap.

(lbs)
Moment
Static
Roll Mx.

(N-m)
Moment
Static
Roll My.

(N-m)
Moment
Static
Roll Mz.

(N-m)
Carriage
Width


(mm)
Carriage
with
Tapped
Holes
Net
Wt.

(kg)
Net
Wt.

(lbs)
Price


(USD)
2D
PDF
Drawing
CR40-C3-M6-NB40133.430222.4502.636.03.075.0Yes0.531.1$169.00
CR40-C3-NO-NB40133.430222.4502.636.03.075.0No0.541.2$169.00

Below are some example part numbers with product pictures.

CR40 Loading Diagram
CR40 Straight Rail Part Number Example
CR40 Carriage and 180 Degree Turn Example
CR40 90 Degree Turn Rail Section

For a system consisting of carriages and rails the typical lead-time is 2-3 days.

Lubricant Requirements

Applying a small amount of an NLGI #2 lithium-based grease with no solid additives such as MoS2 (molybdenum disulfide) along the surface where the cam roller wheel contacts the rail is recommended for quiet operation and long life.

Alignment Tool

Part number is CR40-ALIGNTOOL

Price is $50.00 each

CR40 Alignment Tool

Below is a list of available Rail Sections ready and in stock.

Clicking on the part number will immediately take you to our online store.
   PART NUMBER    Series
Size
Rail
Section
Type
Rail
Length

(mm)
Rail
Length

(inches)
Turn
Radius

(mm)
Turn
Radius

(inches)
Rail
Material
Net
Wt.

(kg)
Net
Wt.

(lbs)
Price

(USD)
2D
PDF
Drawing
CR40-L170-NB40Straight1706.7Steel0.360.8$112.50
CR40-L320-NB40Straight32012.6Steel0.691.5$150.00
CR40-L470-NB40Straight47018.5Steel1.002.2$187.50
CR40-L620-NB40Straight62024.4Steel1.353.0$225.00
CR40-L770-NB40Straight77030.3Steel1.683.7$262.50
CR40-L920-NB40Straight92036.2Steel2.004.4$300.00
CR40-L1070-NB40Straight107042.1Steel2.335.1$337.50
CR40-L1220-NB40Straight122048.0Steel2.665.7$375.00
CR40-R150-A90-NB4090 Deg Turn1505.9Steel0.972.1$180.00
CR40-R100-A180-NB40180 Deg Turn1003.9Steel1.182.6$210.00
CR40-R150-A180-NB40180 Deg Turn1505.9Steel1.523.4$240.00
CR40-R200-A180-NB40180 Deg Turn2007.9Steel1.884.2$270.00
CR40-R250-A180-NB40180 Deg Turn2509.8Steel2.224.9$300.00
CR40-R300-A180-NB40180 Deg Turn30011.8Steel2.555.6$360.00
CR40-R350-A180-NB40180 Deg Turn35013.8Steel2.896.4$420.00