Standard cross roller rail sets
L1000 & L1001
Deep groove and anti-creep rail sets
L1002 + L1003
Needle roller rail sets
L1004
Anti-friction coated rail sets
L1005 & L1006
Our cross roller rail sets are of the highest quality.
Parallelism of rolling plane A&B | graph below |
Allowable height tolerance (h) | ±0,02 |
Paired mutual height tolerance (h) | 0,01 |
Allowable width tolerance (w) | +0, -0,02 |
Parallelism
Lubrication:
The units are lubricated with lithium soap lubricant.
Relubricate if required.
Length (mm) Above | Length (mm) Below | Straightness (μ) |
0 | 50 | 2,0 |
50 | 100 | 2,0 |
100 | 160 | 3,0 |
160 | 310 | 3,0 |
310 | 510 | 4,0 |
510 | 600 | 4,0 |
Load capacity depends on:
Load calculations
Calculations of retainer length and number of rollers:
Worked example:
Assume L1000.09-400 with a stroke of 250mm:
Cage length = 400 - (250/2) = 275mm
Roller Ø = 9mm with a pitch (see table) of 18mm:
Number of rollers = 275/18 = 15
Load rating of system = load/roller* x no. of rollers (a pair of rollers) = 2420N x 15 = 36,300N
*See product table for allowable load per roller.
Allowable load rating with a 3x safety factor compared to static load
Plastic cage
L1008.###-PR-xxx
Plastic cage with steel rollers, for horizontal and vertical use.
Steel cage
L1008.###-AA-xxx
Steel cage with steel rollers, for horizontal use only.
Order no. | d | p | h | w | Cage material |
L1008.020-PR-xxx | 2 | 3,9 | 5 | 0,75 | Plastic - black |
L1008.030-PR-xxx | 3 | 5,0 | 7 | 1,00 | Plastic - black |
L1008.060-PR-xxx | 6 | 8,5 | 14 | 2,00 | Plastic - black |
L1008.090-PR-xxx | 9 | 14,0 | 20 | 3,00 | Plastic - black |
L1008.020-AA-xxx | 2 | 4 | 5,5 | 0,80 | Steel |
L1008.030-AA-xxx | 3 | 5 | 7,5 | 0,50 | Steel |
L1008.060-AA-xxx | 6 | 12 | 14 | 0,80 | Steel |
L1008.090-AA-xxx | 9 | 18 | 19,5 | 1,00 | Steel |
L1008.120-AA-xxx | 12 | 22 | 25 | 1,20 | Steel |
Roller load ratings (per roller)
Rail size | Max. dynamic load Co N | Max. static load C N | Allowable* load N |
1 | 125 | 144 | 48 |
2 | 290 | 290 | 95 |
3 | 630 | 760 | 250 |
4 | 1230 | 1170 | 390 |
6 | 2570 | 2630 | 870 |
9 | 7190 | 7270 | 2420 |
12 | 14700 | 13100 | 4300 |
The more rollers the greater the load capacity
* Allowable load is 1/3 of max. static load/roller, to allow a safety factor in calculations of 3.
Type GA
Type GB
Type GC
Rail size | GA l | GB l | GC l |
1 | 1,5 | - | - |
2 | 2 | 3 | - |
3 | 2 | 2 | 3 |
6 | 3 | 3 | 5 |
9 | 3 | 4 | 6 |
12 | 3 | 5 | 8 |
End screw
Rail | h | d1 | d2 | d3 | l1 | l2 | A/F |
3 | 3 | M3 | 2,3 | 5 | 12 | 5 | 2,5 |
6 | 5 | M5 | 3,9 | 8 | 20 | 8 | 4 |
9 | 6 | M6 | 4,6 | 8,5 | 30 | 12 | 5 |
12 | 8 | M8 | 6,25 | 11,3 | 40 | 17 | 6 |
Recommended torque for pre-load screws
Rail size | Set screw size | Torque to Nm |
1 | M2 | 0,008 |
2 | M3 | 0,012 |
3 | M4 | 0,05 |
4 | M4 | 0,08 |
6 | M5 | 0,2 |
9 | M6 | 0,4 |
Fixing screws
Rail size | d1 | d2 | d3 | h | l1 | l2 | A/F | Torque to Nm |
3 | M3 | 2,3 | 5 | 3 | 12 | 5 | 2,5 | 1,0 |
4 | M4 | 3,1 | 5,8 | 4 | 15 | 7 | 3 | 2,4 |
6 | M5 | 3,9 | 8 | 5 | 20 | 8 | 4 | 4,8 |
9 | M6 | 4,6 | 8,5 | 6 | 30 | 12 | 5 | 8,1 |
11 | M8 | 6,25 | 11,3 | 8 | 40 | 17 | 6 | 19,7 |
Caged rolling elements
Part no. | For rail size | p | d | Allowable load/roller (N) |
L1002.BN04 | 4 | 6,5 | 4,5 | 850 |
L1002.BN06 | 6 | 8,5 | 6,5 | 1800 |
Suitable for horizontal + vertical applications.
Load capacity depends on:
Load calaculations
Calculations of retainer length and number of rollers:
Type NB
Used for 90% of uses - horizontal or vertical applications.
Type NC
Used where rails of different lenghts are used. Only mount to longest rail.
To mount rails to structure.
Order no. | For rail size | d1 | l1 |
L1002.FS04 | 4 | M2,5 | 12 |
L1002.FS06 | 6 | M3 | 16 |
Five rail profi le sizes, M and V parts mate together. A system normally requires 2 M rails, 2 V rails, 2 needle roller rail cages and 4 end stops. Higher load capacity than cross roller rail sets. Improved rigidity and less sensitive to dirt and dust. Long and short lengths can be combined in a system.
Cage length = Rail length - (Stroke/2)
= 500-(200/2) = 400mm
For a L1004.M22 rail the cage that suits is L1004.HW10 This has a roller pitch of 4,0mm, so in a 400mm length there are 100 pairs of rollers see needle roller cage table L1004.HW10. Cage specifi cation therefore 2 x L1004. HW10-0100.
The load rating per pair of rollers is 2500N, so load capacity is 100 x 2500N = 250,000 N so the rail selected is suitable with a high safety factor.
Maximum speed = 50m/min
Maximum acceleration = 15g (150m/sec2)
To attain the maximum speed and acceleration capability without skidding of the rollers (which can result in cage creep), the linear system must be suitably preloaded.
Cage | Roller pitch | Max. dynamic load per roller C (N) | Use with |
L1004.HW10 | 4,0 | 2,500 | L1004.22 |
L1004.HW15 | 4,5 | 4,000 | L1004.25 |
L1004.HW20 | 5,5 | 7,300 | L1004.30 |
L1004.HW25 | 6,0 | 12,500 | L1004.35 |
L1004.HW30 | 7,0 | 18,500 | L1004.45 |
L1004
Standard needle roller rail set
L1005
Anti-friction coated rail set
- Medium duty
L1006
Anti-friction coated rail set
- Heavy duty
Dim. | 22 | 25 | 30 | 35 | 45 |
d | M4 | M6 | M6 | M6 | M6 |
w | 10 | 14 | 18 | 19 | 29 |
l1 | 10 | 11 | 12 | 16 | 20 |
l2 | 6 | 7 | 8 | 10 | 12 |
h | 7,5 | 10,5 | 10,5 | 11,5 | 15,6 |
Standard end pieces are GM type
Rail size | GM type | GV type | GFV type |
22 | L1004.GM22 | L1004.GV22 | L1004.GFV22 |
25 | L1004.GM25 | L1004.GV25 | L1004.GFV25 |
30 | L1004.GM30 | L1004.GV30 | L1004.GFV30 |
35 | L1004.GM35 | L1004.GV35 | L1004.GFV35 |
45 | L1004.GM45 | L1004.GV45 | L1004.GFV45 |
Ordering example:
Four rails (two M and two V), with needle roller cage and end straps.
L1004.M35-0700 - 2 rails
L1004.V35-0700 - 2 rails
Needle roller cage - 2 pieces
L1004.GM35 - 4 pieces, 4 end stops
22 | 25 | 30 | 35 | 45 | |
l1 | 30 | 40 | 40 | 50 | 60 |
d1 | M6 | M8 | M10 | M12 | M12 |
d2 | 4,6 | 6,25 | 7,9 | 9,5 | 9,5 |
d3 | 8,5 | 11,3 | 13,9 | 15,8 | 15,8 |
l2 | 18 | 25 | 22 | 25 | 35 |
h | 6 | 8 | 10 | 12 | 12 |
A/F | 5 | 6 | 8 | 10 | 10 |
L1006.V coated - V rail
L1005.M coated - M rail
• Minimises vibration • Improves rigidity • Tolerant to dirt and particles • Max. speed 20m/min • Max. temp 50°C
Part No. | Width of bearing surface (cm) | Dynamic load rating/cm2 C (N) | Static load rating/cm2 C0 (N) |
L1006.V22 | 1,05 | 4500 | 7500 |
L1006.V25 | 1,15 | 4500 | 7500 |
L1006.V30 | 1,50 | 4500 | 7500 |
L1006.V45 | 1,75 | 4500 | 7500 |
L1006.V55 | 2,45 | 4500 | 7500 |
Part No. | Width of bearing surface (cm) | Dynamic load rating/cm2 C (N) | Static load rating/cm2 C0 (N) |
L1005.M03 | 0,30 | 4500 | 7500 |
L1005.M06 | 0,60 | 4500 | 7500 |
L1005.M09 | 1,20 | 4500 | 7500 |
L1005.M12 | 1,60 | 4500 | 7500 |
Load ratings:
Load/cm2 (see table above) (N)
Width of bearing surface (cm)
Length of rail (cm)
C= rating x width x length
Load calculation example:
Take L1006.V30-600
Length of rail 600mm (60cm)
Width of bearing surface (cm)
- see table 1.50cm
Dynamic load rating (N)
4500 x (60 x 1.5) = 405,000 N
= 405 kN
Static load rating (N)
7500 x (60 x 1.5) = 675,000 N
= 675 kN
Inaccurate assembly
Inaccurate assembly or machining of surfaces will lead to low accuracy and cage creep which affects system reliability and life.
Cage creep
High speeds or off -set loads, high levels of vibration can cause cage creep.
End screws
These function to prevent the cage falling out. They are not designed as end stops. If this is required it should be designed into your system.
Ensure structure is rigid and machined accurately
All burrs, dents, dust, etc. on the table and base need to be reduced.
Pre-load adjustment; too much preload can cause damage & reduced life. We recommend to used no or a small amount of pre-load.
Adjusting screw
Clamp
Taper block
1. Apply a low viscosity oil on contact surface, fix rail (1,2 & 3) lightly.
5. Move the table to one end and adjust pre-load screw slightly.
2. Temporarily fix the rail in adjusted side (4)
6. Move table to the other end and repeat.
3. Disassemble end screw from one end, and carefully insert roller retainer to nearly the centre of the rail.
Replace the end screw.
Slowly move table back and forth to the rail end, and adjust roller retainer position to rail centre.
7. Return the table back to centre and lock the preload adjusting screw slightly. Adjust the clearance of table to zero. For fi nal adjustment of preload, set correct torque value with a torque wrench and prepare to lock the rail fixing screw.
4. Fix gauges both in centre and the side of the table.
8. Finally surely lock the rail.
0 : Loading on to pre-load adjusting screw
X : Loading off to pre-load adjusting screw
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Portfield Works
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or + 44 (0) 1483 266 774
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