How do Dyno roller codes work?

Ever wonder what all the numbers and letters mean when ordering replacement rollers? Here we’ll explain their meaning and why every roller Dyno manufactures has its own unique code.

Dyno roller codes can consist of up to 12 parts depending on the type of roller being ordered. Each part refers to a critical component which is then used by our workshop team to manufacture your roller correctly and according to specification. We can also provide PDF and .stp file drawings if any of the details are unclear or you would like to import into your design.

Did you know that Dyno uses a roller code generator robot to automatically create roller codes that match the specifications you provide?

1. Tube Diameter

This references the outside diameter of the roller in nearest mm.

20 – 19mm – 20mm
25 – 25mm – 25.4mm
30 – 30mm
32 – 32mm
38 – 38mm
42 – 42mm
48 – 48.3mm
50 – 50mm
51 – 50.8mm
60 – 60mm – 60.3mm
75 – 75mm – 76.3mm
89 – 89mm
114 – 114mm

2. Bearing Type

0 = Bushed Endcap
2 = Thermoplastic Race Bearing with Stainless Steel or Plastic Balls
3c = Steel Bearing with Caged Balls
5 = Precision Bearing, Zinc plated steel housing and bush
7 = Precision Bearing, Thermoplastic housing and bush

3. Bearing Details (optional)

SS = Stainless Steel Precision Bearing
T = Includes locater for tapered elements
B = Blind
G = Greased (extra)
HD – Heavy Duty
SE = Sealed

4. Shaft Size

6 – 6mm Round
8 – 8mm Round
10 – 10mm Round
12 – 12mm Round
16 – 16mm Round
19 – 19mm Round
20 – 20mm Round
Q – 10mm Round with 8mm across the flats
11H – 11mm Hex
16H – 16mm Hex

5. Sprocket or Pulley Details (optional)

Z = Chain Sprocket
TB = Toothed Belt Sprocket
MV = Mini-v Pulley
14 = Number of Teeth (can also be 11, 20 etc.)
S = Single Row
D = Double Row
F = Fixed Drive
L = Loose (accumulation) Drive
GP = Double Groove O-Band Pulley

6. Tube Material

This will also include the wall thickness when non-standard thicknesses are being used e.g. G3.6 refers to Galvanised Steel Tube that has a 3.6mm thick wall.

AL = Aluminium
D = Dyno pipe
G = Galvanised Steel
P = Plastic or PVC
N = Stainless Steel
B = Black Mild Steel

7. Shaft Material

AL = Aluminium
MS = Mild Steel
SS = Stainless Steel
ZP = Zinc Plated Mild Steel

8. Shaft Type

SP = Spring Loaded
F = Fixed
L = Loose
SP/L = Spring loaded one end, fixed the other

9. Shaft Extra’s (optional)

DL = Cross Drilled
FL = Flats
FT = Female Threads
MT = Male Threads
SL = Slots

10. Length of Roller

OBL = Over Bearing Length (measurement of roller from the outside of roller bearings)
IF = Inside Frame Width
TL = Tube Length (Excluding Bearings)

11. Shaft Length

Standard shaft length is typically OBL + 30mm with 15mm equal extensions out each end. We can also accommodate longer or shorter shafts with different extensions each end.

12. Roller Extra’s (Optional)

T = Tapered Tube or Tapered Elements (depending on tube material)
GR = Grooves, will also include number and spacing from outside of bearing to center of groove e.g. 1GR85 references a single groove at 85mm.
RC = Rubber Coated, this is typically a natural rubber sleeve which is fitted onto the tube and not bonded.