Laser cutting machine rack and pinion pit avoidance guide（Shop·Install·use·maintain）

1. Module selection：The laser machine must be M2 Start，Not recommended M1.5

Module is the core parameter of gears，Represents tooth size and load-bearing capacity。Laser cutting machine is a high-speed reciprocating、Equipment that frequently accelerates and decelerates，High requirements for gear strength。The common industry standard is：Available for small desktop computers M1.5，1325、1530、2040 Other standard modelsMust use M2 and above modulus。M1.5 Small tooth shape，Broken teeth are prone to occur during high-speed operation、Skipping teeth、accelerated wear、Issues such as the return error becoming larger。Many low-priced equipment are used to reduce costs M1.5，No problem with short-term use，but 3–6 The accuracy dropped significantly after a few months，Repair costs are extremely high。

2. Accuracy level：If you don’t understand, just choose DIN 6–7 class

Precision directly determines the cutting effect。Many customers only look at the brand，Regardless of accuracy level，Finally, it appears that the circle is not round.、Cut square but not square、corner fillets、Problems such as large backlash。Commonly used grades of laser cutting machines are DIN 6、DIN 7、DIN 8。Recommended export models and high-precision fiber laser machines DIN 6 class；Common commercial laser machine use DIN 7 The most stable level；DIN 8 Mostly used in low-end devices，Not suitable for export and high-demand scenarios。

3. Tooth shape selection：Helical teeth are best，But the mainstream uses straight teeth

From the perspective of theoretical performance，Helical gear meshing area is larger、Runs more smoothly、less noise、Higher accuracy，But the cost is high、Requires pairing、Weak versatility。Straight teeth are easy to process、low price、Easy to replace、Strong versatility、Sufficient stock。Current laser cutting machine industry 90% Use straight teeth above，Only a few ultra-high-precision machines use helical gears。For the vast majority of users，Straight teeth are cost-effective、stability、Best choice for maintenance costs。

4. Material must be selected S45C or S50C，Reject inferior materials

The standard material of laser machine gear isS45C medium carbon structural steel，Good toughness、Wear-resistant、Not easy to chip teeth。Overload、high power、24 It is recommended to upgrade equipment that operates continuously for hours.S50C high carbon steel，higher intensity、Longer life。Used by some low-priced products on the market Q235 Ordinary steel，Cannot be quenched effectively、Not wear-resistant、Easy to deform，Never choose。

5. The hardness must reach HRC 50–55，Must be quenched

Gears must undergo high frequency quenching，otherwise 1–3 It will be seriously worn out within a few months。The standard hardness range isHRC 50–55。Common equipment selection HRC 50 That’s it；Overload、high speed、Recommendations for running equipment for long periods of time HRC 55。If the hardness is too low, it will wear out quickly.；If the hardness is too high, the brittleness will increase.，prone to chipping of teeth。

6. Install pit avoidance：Concentricity is key

Gear installation eccentricity、tilt、Disagree，Will directly cause running jitter、Noise gets louder、Poor meshing、Unilateral wear、Cutting accuracy decreases。A meter must be calibrated during installation.，The concentricity error is controlled within 0.02mm within，To ensure long-term stable operation。

7. Lubrication and maintenance：No maintenance=Early scrapping

Laser cutting environment is dusty，Dust entering the tooth surface will accelerate wear。Special gear oil or high-temperature grease must be used for regular maintenance。Lack of lubrication will cause high temperatures、bite to death、Problems such as tooth surface peeling。It is recommended to check the lubrication status once a month，Thorough cleaning every quarter。

1. Brand star ranking（Export level reference）

★★★★★ top brands：Kefir Kamo、Atlanta Atlanta。Highest accuracy、The most stable quality、expensive，Used in high-end equipment and high-standard export scenarios。

★★★★☆ First-line brand：YYC、Taiying。Stable quality、Accuracy and reliable、High cost performance，It is the most commonly used choice for exporting to Europe and the United States.。

★★★☆☆ Second-tier brands：Domestic elite、German standard。Meet the needs of commercial laser machines，Stability and price balance。

★★☆☆☆ low-end brand：Unlabeled small factory products。Accuracy is not up to standard、No quenching、Easy to deform、short life，Not recommended for export and long-term use。

2. Rack module：It is also necessary M2 Start

The rack module must match the gear，Laser machineMinimum selection M2。M1.5 Only suitable for small devices，Standard models must use M2。Insufficient modulus will lead to insufficient load、Running jitter、Decreased accuracy、shortened lifespan。

3. Accuracy level：Select precision straight teeth for commercial use

Commonly used laser cutting machines JIS 7 class、DIN 8 Precision straight teeth。Export model suggestions DIN 7 class，General commercial equipment DIN 8 level is stable enough。The lower the accuracy, the cheaper the price，However, cutting graphics are prone to deformation.、corner fillets、Problems such as large backlash。

4. Tooth shape：How to choose between helical and straight teeth

Helical teeth are smooth、mute、High precision，But the price is high、Trouble pairing。Straight teeth are highly versatile、low cost、Easy to maintain、Sufficient stock。95% Laser cutting machine uses straight teeth，Helical gears are only used in high-precision special scenarios。

5. Material and hardness：S45C、S50C、HRC 50、HRC 55

The standard rack material isS45C，Quenching hardnessHRC 50。Heavy equipment usageS50C，hardnessHRC 55。Unquenched racks must not be used，3 It will wear out in a few months、rust、stuck，causing equipment failure。

6. The installation must be straightened、Smooth docking

Improper installation of the rack will cause the gantry to deviate、Cutting graphics deformation。If the docking is uneven, tooth skipping will occur.、impact、Lost step、Motor overload。Installation must be calibrated with a ruler and table，Straightness is controlled at 0.02mm/m within。

7. Screw fixation：Not too loose or too tight

Loose screws can cause the rack to shift、Accuracy deteriorates；Over-tightening the screws will cause rack deformation、Poor meshing。It is recommended to use a torque wrench to tighten according to standard torque，Ensure long-term stability。

8. Dustproof and rustproof：Essential for laser environment

Laser cutting produces a large amount of metal dust，Easy to enter the tooth surface causing rapid wear。It is recommended to install a dust cover，Clean up dust regularly、Replenish lubrication、Do a good job in rust prevention，Can significantly extend service life。

9. Long stroke splicing：Docking accuracy determines the operating effect

Long stroke equipment requires multiple racks to be connected，Height difference at the docking point、The gap must be controlled to a very small range，Otherwise, there will be obvious vibration when running at high speed.、noise、Decreased accuracy。