PRODUCT · Linear Motion
Ground straight rack
Straight racks · ground teeth · 20° pressure angle; ground flanks, high pitch accuracy, induction hardened — for laser-cutting gantries, CNC machine X/Y axes and other high-precision long-travel linear drives.
Last updated Reviewed by Luo Genwen, Production Plant Manager
Specifications · Selector
Ground straight rack selector
All 34 standard sizes from the catalogue PDF. Search by code or filter by module and length. All dimensions in mm.
Complete size table · 34 sizes (static version for printing and full-text search)
| Code | Module M | Length L | Teeth z | b | hk | h0 | A | L3 | Holes n | h | d1 | d2 | t | A1 | L2 | d3 | Pitch err /300mm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 11 010 050 | 1 | 499.51 | 159 | 15 | 15 | 14 | 62.44 | 124.88 | 4 | 6 | 4.5 | 8 | 5 | 29 | 441.5 | 5.7 | 0.022 |
| 11 11 010 100 | 1 | 999.03 | 318 | 15 | 15 | 14 | 62.44 | 124.88 | 8 | 6 | 4.5 | 8 | 5 | 29 | 941 | 5.7 | 0.022 |
| 11 11 015 050 | 1.5 | 499.51 | 106 | 17 | 17 | 15.5 | 62.44 | 124.88 | 4 | 7 | 6 | 9.5 | 7 | 29 | 441.5 | 5.7 | 0.022 |
| 11 11 015 100 | 1.5 | 999.03 | 212 | 17 | 17 | 15.5 | 62.44 | 124.88 | 8 | 7 | 6 | 9.5 | 7 | 29 | 941 | 5.7 | 0.022 |
| 11 11 020 050 | 2 | 502.65 | 80 | 24 | 24 | 22 | 62.83 | 125.66 | 4 | 8 | 7.5 | 11.5 | 7 | 31.3 | 440.1 | 5.7 | 0.022 |
| 11 11 020 100 | 2 | 1005.31 | 160 | 24 | 24 | 22 | 62.83 | 125.66 | 8 | 8 | 7.5 | 11.5 | 7 | 31.3 | 942.7 | 5.7 | 0.022 |
| 11 11 030 050 | 3 | 508.94 | 54 | 29 | 29 | 26 | 63.62 | 127.23 | 4 | 9 | 10 | 15 | 9 | 34.4 | 440.1 | 7.7 | 0.024 |
| 11 11 030 100 | 3 | 1017.88 | 108 | 29 | 29 | 26 | 63.62 | 127.23 | 8 | 9 | 10 | 15 | 9 | 34.4 | 949.1 | 7.7 | 0.024 |
| 11 11 040 050 | 4 | 502.65 | 40 | 39 | 39 | 35 | 62.83 | 125.66 | 4 | 12 | 10 | 15 | 9 | 37.5 | 427.7 | 7.7 | 0.025 |
| 11 11 040 100 | 4 | 1005.31 | 80 | 39 | 39 | 35 | 62.83 | 125.66 | 8 | 12 | 10 | 15 | 9 | 37.5 | 930.3 | 7.7 | 0.025 |
| 11 11 050 050 | 5 | 502.65 | 32 | 49 | 39 | 34 | 62.83 | 125.66 | 4 | 12 | 14 | 20 | 13 | 30.1 | 442.4 | 11.7 | 0.025 |
| 11 11 050 100 | 5 | 1005.31 | 64 | 49 | 39 | 34 | 62.83 | 125.66 | 8 | 12 | 14 | 20 | 13 | 30.1 | 945 | 11.7 | 0.025 |
| 11 11 060 050 | 6 | 508.94 | 27 | 59 | 49 | 43 | 63.62 | 127.23 | 4 | 16 | 18 | 26 | 17 | 31.4 | 446.1 | 15.7 | 0.026 |
| 11 11 060 100 | 6 | 1017.88 | 54 | 59 | 49 | 43 | 63.62 | 127.23 | 8 | 16 | 18 | 26 | 17 | 31.4 | 955 | 15.7 | 0.026 |
| 11 11 080 050 | 8 | 502.65 | 20 | 79 | 79 | 71 | 62.83 | 125.66 | 4 | 25 | 22 | 33 | 21 | 26.6 | 449.5 | 19.7 | 0.027 |
| 11 11 080 100 | 8 | 1005.31 | 40 | 79 | 79 | 71 | 62.83 | 125.66 | 8 | 25 | 22 | 33 | 21 | 26.6 | 952 | 19.7 | 0.027 |
| 11 11 100 100 | 10 | 1005.31 | 32 | 99 | 99 | 89 | 62.83 | 125.66 | 8 | 32 | 33 | 48 | 32 | 125.7 | 753.96 | 19.7 | 0.028 |
| 21 11 010 050 | 1 | 499.51 | 159 | 15 | 15 | 14 | 62.44 | 124.88 | 4 | 6 | 4.5 | 8 | 5 | 29 | 441.5 | 5.7 | 0.022 |
| 21 11 010 100 | 1 | 999.03 | 318 | 15 | 15 | 14 | 62.44 | 124.88 | 8 | 6 | 4.5 | 8 | 5 | 29 | 941 | 5.7 | 0.022 |
| 21 11 015 050 | 1.5 | 499.51 | 106 | 17 | 17 | 15.5 | 62.44 | 124.88 | 4 | 7 | 6 | 9.5 | 7 | 29 | 441.5 | 5.7 | 0.022 |
| 21 11 015 100 | 1.5 | 999.03 | 212 | 17 | 17 | 15.5 | 62.44 | 124.88 | 8 | 7 | 6 | 9.5 | 7 | 29 | 941 | 5.7 | 0.022 |
| 21 11 020 050 | 2 | 502.65 | 80 | 24 | 24 | 22 | 62.83 | 125.66 | 4 | 8 | 7.5 | 11.5 | 7 | 31.3 | 440.1 | 5.7 | 0.022 |
| 21 11 020 100 | 2 | 1005.31 | 160 | 24 | 24 | 22 | 62.83 | 125.66 | 8 | 8 | 7.5 | 11.5 | 7 | 31.3 | 942.7 | 5.7 | 0.022 |
| 21 11 030 050 | 3 | 508.94 | 54 | 29 | 29 | 26 | 63.62 | 127.23 | 4 | 9 | 10 | 15 | 9 | 34.4 | 440.1 | 7.7 | 0.024 |
| 21 11 030 100 | 3 | 1017.88 | 108 | 29 | 29 | 26 | 63.62 | 127.23 | 8 | 9 | 10 | 15 | 9 | 34.4 | 949.1 | 7.7 | 0.024 |
| 21 11 040 050 | 4 | 502.65 | 40 | 39 | 39 | 35 | 62.83 | 125.66 | 4 | 12 | 10 | 15 | 9 | 37.5 | 427.7 | 7.7 | 0.025 |
| 21 11 040 100 | 4 | 1005.31 | 80 | 39 | 39 | 35 | 62.83 | 125.66 | 8 | 12 | 10 | 15 | 9 | 37.5 | 930.3 | 7.7 | 0.025 |
| 21 11 050 050 | 5 | 502.65 | 32 | 49 | 39 | 34 | 62.83 | 125.66 | 4 | 12 | 14 | 20 | 13 | 30.1 | 442.4 | 11.7 | 0.025 |
| 21 11 050 100 | 5 | 1005.31 | 64 | 49 | 39 | 34 | 62.83 | 125.66 | 8 | 12 | 14 | 20 | 13 | 30.1 | 945 | 11.7 | 0.025 |
| 21 11 060 050 | 6 | 508.94 | 27 | 59 | 49 | 43 | 63.62 | 127.23 | 4 | 16 | 18 | 26 | 17 | 31.4 | 446.1 | 15.7 | 0.026 |
| 21 11 060 100 | 6 | 1017.88 | 54 | 59 | 49 | 43 | 63.62 | 127.23 | 8 | 16 | 18 | 26 | 17 | 31.4 | 955 | 15.7 | 0.026 |
| 21 11 080 050 | 8 | 502.65 | 20 | 79 | 79 | 71 | 62.83 | 125.66 | 4 | 25 | 22 | 33 | 21 | 26.6 | 449.5 | 19.7 | 0.027 |
| 21 11 080 100 | 8 | 1005.31 | 40 | 79 | 79 | 71 | 62.83 | 125.66 | 8 | 25 | 22 | 33 | 21 | 26.6 | 952 | 19.7 | 0.027 |
| 21 11 100 100 | 10 | 1005.31 | 32 | 99 | 99 | 89 | 62.83 | 125.66 | 8 | 32 | 33 | 48 | 32 | 125.7 | 753.96 | 19.7 | 0.028 |
Static copy of the selector data for reference and printing; use the interactive selector above to filter, sort and request a quote. All dimensions in mm; full range and tolerances per the PDF catalogue.
Click a column header to sort. Racks butt-joint to any length. Dimensions in mm. Source: Wolfer gear-rack catalogue. Download PDF catalogue ↗
FAQ
Common questions about this series
Ground straight rack: what size range does the table cover?
The table lists 34 standard racks: module 1–10, standard lengths 500 / 503 / 509 / 999 / 1005 / 1018 mm (20–318 teeth per piece). Racks can be butt-jointed end to end for longer travel; other modules, lengths and mounting-hole patterns are made to drawing.
Ground straight rack: what is it and when should I use it?
Straight racks · ground teeth · 20° pressure angle; ground flanks, high pitch accuracy, induction hardened — for laser-cutting gantries, CNC machine X/Y axes and other high-precision long-travel linear drives. Choose ground racks (Grade 6, induction hardened HRC 50–55) for laser gantries, CNC axes and any drive where positioning accuracy and long life matter; milled racks (about Grade 7) are the economical option for medium-accuracy automation and conveying. Helical teeth run smoother at speeds above roughly 60 m/min and carry about 30% more load per face width, at the cost of axial thrust on the pinion bearings.
Ground straight rack: can I order a size that is not in the table, or just one piece?
Yes. Everything on this page is made to drawing, and the table is only the standard-size subset of the catalogue. Minimum order quantity is one piece — we routinely make single replacement parts for OEMs whose original supplier has discontinued the item. Send a DWG, STEP or PDF drawing (or a sample part): you get a formal quotation within 24 hours after the information is complete, and the first article ships within 30 days of drawing approval, with inspection records.
Ground straight rack: what do I need to send to get a quote?
Send the drawing or: module, straight or helical (with helix angle), length and number of teeth, cross-section (height × width), mounting-hole pattern, accuracy class and hardening requirement, whether ends must be matched for jointing, and quantity. Tell us the pinion you use so pitch and profile match.