Description
Size-specific context
Where JDLB 90 sits in the range
JDLB 90 is the largest principal JDLB size in this six-size group, with the highest documented output radial/axial load figures and an additional 100:1 supplemental ratio context. The dual-lead principle lets the assembled mesh be adjusted by moving the worm axially; it does not make the bare shaft interchangeable with another family size.
For size 90, include handling and support details around the larger shaft/housing interfaces as well as the tooth data. If a 100:1 configuration is involved, call it out explicitly in the RFQ.
JDLB 90 size and adjustment data
| Parameter | Specification / guidance |
|---|---|
| Series size | JDLB 90 |
| Drive concept | Dual-lead worm drive with axial backlash adjustment |
| Documented ratio contexts | 14.5, 19.5, 24.5*, 30, 40*, 45, 50*, 60, 80*, 90, 100* |
| Lead-angle examples | 15°05′ at 14.5; 12°14′ at 19.5; 7°40′ at 30; 5°45′ at 45; 4°36′ at 60; 3°15′ at 90; 2°57′ at 100 |
| Adjustment distance V | 13 mm |
| Adjustment coefficient k | 0.025–0.06 mm⁻¹ |
| Clearance adjustment ΔSd | 0.33–0.78 mm |
| Input shaft diameter J | 28 mm |
| Envelope A / B / C | 186 / 234 / 91 mm |
| Drive-level P0 grade | 1 arc minute |
| Drive-level P1 grade | 2–4 arc minutes |
| Documented output radial load Fr2 | 15000 N |
| Documented output axial load Fa2 | 12300 N |
| Material / heat treatment of replacement shaft | Confirm from ordered drawing or approved project specification |
Selected JDLB 90 performance references
| Ratio context | Documented performance reference |
|---|---|
| Ratio 14.5 | At n1=1400 min⁻¹: dynamic efficiency 0.85; rated input power 4.1 kW; output torque 360 Nm; output speed 96.6 min⁻¹. |
| Ratio 45 | At n1=1400 min⁻¹: dynamic efficiency 0.72; rated input power 1.7 kW; output torque 350 Nm; output speed 31.1 min⁻¹. |
| Ratio 100 | At n1=1400 min⁻¹: dynamic efficiency 0.58; rated input power 0.7 kW; output torque 270 Nm; output speed 14.0 min⁻¹. |
Adjustment data for JDLB 90
The documented adjustment range for size 90 uses V=13 mm, k=0.025–0.06 mm⁻¹ and ΔSd=0.33–0.78 mm. These values describe the reducer adjustment context and should not be converted into a standalone tooth tolerance on a replacement shaft.
Ratio, starts and replacement identification
The size-90 mesh table spans these documented ratio contexts: 14.5, 19.5, 24.5*, 30, 40*, 45, 50*, 60, 80*, 90, 100*. Worm start count and lead angle change with the selected ratio, so the reducer size alone is not enough to manufacture a replacement worm.
When the old shaft is worn, read the ratio plate or gearbox record and inspect the mating wheel before finalizing tooth geometry. For JDLB 90, also include the shaft end interfaces and bearing-journal dimensions in the same RFQ.
Replacement RFQ
What to send for a JDLB 90 quote
Send the size-90 reducer reference, ratio, quantity, current worm-shaft drawing or measured sample, and the mating-wheel condition. Mark any surfaces affected by wear so measured damage is not treated as intended geometry.
For JDLB 90, the order review should reflect that the largest principal JDLB size in this six-size group, with the highest documented output radial/axial load figures and an additional 100:1 supplemental ratio context. State the requested 1 arc minute P0 or 2–4 arc minutes P1 drive grade as an assembled-mesh target and include the wheel condition plus the documented V=13 mm adjustment context.
Frequently asked questions
Does JDLB 90 extend to a 100 ratio context?
Yes. The documented mesh/performance tables include 100 as a supplemental ratio context for size 90; the exact worm geometry must match that configuration.
Can JDLB 90 be ordered from the size number alone?
No. The 90 family still contains different ratio/start/lead conditions. Send the ratio and current shaft or wheel data so the tooth relationship can be confirmed.
What if the JDLB 90 wheel is also worn?
Quote the size-90 worm and wheel together when wear or contact condition makes the original mesh uncertain. Pair-level review avoids treating a damaged mating member as a valid reference.
Replacement / service
Use JDLB 90 as a drive-family reference, then confirm the actual shaft
The JDLB 90 page carries documented series context for a dual-lead worm drive, including size-specific envelope, adjustment and selected drive-performance references already shown above. Those figures describe the drive family; they do not define every bearing journal, end feature or replacement shaft dimension.
A JDLB 90 replacement enquiry should identify the exact drive, ratio, mating wheel and supported shaft interfaces, then state whether the work is preventive spare supply or a correction after wear/backlash change. These cases can require different inspection attention.
JDLB 90 order-release checklist
| Release item | Information to supply |
|---|---|
| Drive identity | JDLB 90 size reference plus ratio / model information. |
| Existing shaft | Drawing, sample, or trusted dimensions for journals, shoulders and input/end interfaces. |
| Mating wheel | Current wheel condition and identifying data; include it when tooth geometry or contact is uncertain. |
| Adjustment state | Current axial adjustment/reference position and the reason for replacement or backlash correction. |
| Duty | Input speed, load/torque context, reversals and lubrication condition. |
| Inspection | State whether the order needs dimensional records, material/treatment evidence or pair/assembly checks. |
Where the JDLB 90 shaft sits in a multi-unit drive context
If size-90 units are used in a linked arrangement, show the complete torque path, support locations and station spacing available from the machine documentation. The catalogue arrangement illustrates the concept but does not replace those machine dimensions.
Quote from the real interfaces
Request a Quote / Send RFQ
Send the model or drawing reference, quantity, application and the geometry that controls fit and mesh. Unknown values can be identified for confirmation rather than guessed.
